Manual.rst 365 KB
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.. ==================================================
.. Header hierachy
.. ==
..  --
..   ^^
..    ''
..     ;;
..      ,,
..
.. --------------------------------------------------
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.. Best Practice T3 reST  https://docs.typo3.org/typo3cms/drafts/github/xperseguers/RstPrimer/
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.. External Links: `Bootstrap <http://getbootstrap.com/>`_:
.. Add Images: https://wiki.typo3.org/ReST_Syntax#Images
..
.. -*- coding: utf-8 -*- with BOM.


.. include:: Includes.txt

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.. _general:

General
=======

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* Project homepage: https://qfq.io
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* Latest releases: https://w3.math.uzh.ch/qfq/
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* Development: https://git.math.uzh.ch/typo3/qfq
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.. _installation:

Installation
============

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The following features are only tested / supported on linux hosts:
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* General: QFQ is coded to run on Linux hosts, preferable on Debian derivates like Ubuntu.
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* HTML to PDF conversion - command `wkhtmltopdf`.
* Concatenation of PDF files - command `pdftk`.
* Mime type detection for uploads - command `file`.

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.. _`preparation`:

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Preparation
-----------

Report & Form
^^^^^^^^^^^^^

In PHP 5.x the QFQ extension needs  the PHP MySQL native driver. The following functions are used and are only available with the
native driver (see also: http://dev.mysql.com/downloads/connector/php-mysqlnd/):

* mysqli::get_result (important),
* mysqli::fetch_all (nice to use)

To normalize UTF8 input, the *php5-intl* resp. *php7.0-intl* package is needed by

* normalizer::normalize()

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For the `download`_ function, the programs `pdftk` and `file` are necessary to concatenate PDF files.
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Preparation for Ubuntu 14.04::

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	sudo apt-get install php5-mysqlnd php5-intl
	sudo apt-get install pdftk file                # for file upload and PDF
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	sudo php5enmod mysqlnd
	sudo service apache2 restart

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Preparation for Ubuntu 16.04::
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	sudo apt install php7.0-intl
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	sudo apt install pdftk libxrender1 file pdf2svg       # for file upload, PDF and 'HTML to PDF' (wkhtmltopdf), PDF split
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.. _wkhtml:
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wkhtmltopdf
^^^^^^^^^^^
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`wkhtmltopdf <http://wkhtmltopdf.org/>`_ will be used by QFQ to offer 'website print' and 'HTML to PDF' conversion.
The program is not included in QFQ and has to be manually installed.
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* The Ubuntu package `wkhtmltopdf` needs a running Xserver - this does not work on a headless webserver.

  * Best is to install the QT version from the named website above.
  * In case of trouble with wkhtmltopdf, also install 'libxrender1'.
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In `config-qfq-ini`_ specify the:
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* installed `wkhtmltopdf` binary:

  * `WKHTMLTOPDF = /.../wkhtmltopdf`

* the site base URL:

  * `BASE_URL_PRINT = http://example.com/`

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**Important**: To access FE_GROUP protected pages or content, it's necessary to disable the `[FE][lockIP]` check! `wkhtml`
will access the Typo3 page locally (localhost) and that IP address is different from the client (=user) IP.
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Configure via Typo3 Installtool `All configuration > $TYPO3_CONF_VARS['FE']`: ::
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   [FE][lockIP] = 0

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**Warning**: this disables an important anti-'session hijacking' protection. The security level of the whole installation
will be *lowered*! Again, this is only needed if `wkhtml` needs access to FE_GROUP protected pages & content. As an
alternative to lower the security level, create a separated page subtree which is only accessible (configured via
Typosript) from specific IPs **or** if a FE-User is logged in.

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If there are problems with converting/downloading FE_GROUP protected pages, check `SHOW_DEBUG_INFO = download` to debug.

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**Important**: Converting HTML to PDF gives no error message but RC=-1? Check carefully all includes of CSS, JS, images
and so on! Typically some of them fails to load and wkhtml stops running!


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HTML to PDF conversion
''''''''''''''''''''''

`wkhtmltopdf` converts a website (local or remote) to a (multi)-page PDF file. It's mainly used in `download`_.

Print
'''''

Different browser prints the same page in different variations. To prevent this, QFQ implements a small PHP wrapper
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`print.php` with uses `wkhtmltopdf` to convert HTML to PDF.
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Provide a `print this page`-link (replace {current pageId})::

	<a href="typo3conf/ext/qfq/qfq/api/print.php?id={current pageId}">Print this page</a>

Any parameter specified after `print.php` will be delivered to `wkhtmltopdf` as part of the URL.

Typoscript code to implement a print link on every page::

	10 = TEXT
	10 {
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		wrap = <a href="typo3conf/ext/qfq/qfq/api/print.php?id=|&type=2"><span class="glyphicon glyphicon-print" aria-hidden="true"></span> Printview</a>
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		data = page:uid
	}

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Send Email
^^^^^^^^^^

QFQ sends mail via `sendEmail` http://caspian.dotconf.net/menu/Software/SendEmail/ - a small perl script without a central
configuration.

By default, `sendEmail` uses the local installed MTA, writes a logfile to `typo3conf/mail.log` and handles attachments
via commandline options. A basic HTML email support is implemented.

The latest version is v1.56, which has at least one bug. That one is patched in the QFQ internal version v1.56p1 (see
QFQ GIT sources in directory 'patches/sendEmail.patch').

The Typo3 sendmail eco-system is not used at all.

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Setup
-----

* Install the extension via the Extensionmanager.

  * If you install the extension by manual download/upload and get an error message
    "can't activate extension": rename the downloaded zip file to `qfq.zip` or `qfq_<version>.zip` (e.g. version: 0.9.1).

  * If the Extensionmanager stops after importing: check your memory limit in php.ini.

* Enable the online local-documentation_.
* Copy/rename the file *<Documentroot>/typo3conf/ext/<ext_dir>/config.example.qfq.ini* to
  *<Documentroot>/typo3conf/config.qfq.ini* and configure the necessary values: `config.qfq.ini`_
  The configuration file is outside the extension directory to not loose it during updates.
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* When the QFQ Extension is called the first time on the Typo3 Frontend, the file *<ext_dir>/qfq/sql/formEditor.sql* will
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  played and fills the database with the *Form editor* records. This also happens automatically after each software update of QFQ.
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* Configure Typoscript to include Bootstrap, jQuery, QFQ javascript and CSS files.

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.. _setup-css-js:

Setup CSS & JS
^^^^^^^^^^^^^^
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::

	page.meta {
	  X-UA-Compatible = IE=edge
	  X-UA-Compatible.attribute = http-equiv
	  viewport=width=device-width, initial-scale=1
	}

	page.includeCSS {
		file1 = typo3conf/ext/qfq/Resources/Public/Css/bootstrap.min.css
		file2 = typo3conf/ext/qfq/Resources/Public/Css/bootstrap-theme.min.css
		file3 = typo3conf/ext/qfq/Resources/Public/Css/jqx.base.css
		file4 = typo3conf/ext/qfq/Resources/Public/Css/jqx.bootstrap.css
		file5 = typo3conf/ext/qfq/Resources/Public/Css/qfq-bs.css
	}

	page.includeJS {
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		file01 = typo3conf/ext/qfq/Resources/Public/JavaScript/jquery.min.js
		file02 = typo3conf/ext/qfq/Resources/Public/JavaScript/bootstrap.min.js
		file03 = typo3conf/ext/qfq/Resources/Public/JavaScript/validator.min.js
		file04 = typo3conf/ext/qfq/Resources/Public/JavaScript/jqx-all.js
		file05 = typo3conf/ext/qfq/Resources/Public/JavaScript/globalize.js
		file06 = typo3conf/ext/qfq/Resources/Public/JavaScript/tinymce.min.js
		file07 = typo3conf/ext/qfq/Resources/Public/JavaScript/EventEmitter.min.js
      file08 = typo3conf/ext/qfq/Resources/Public/JavaScript/typeahead.bundle.min.js
		file09 = typo3conf/ext/qfq/Resources/Public/JavaScript/qfq.min.js

		# Only needed in case FormElement 'annotate' is used.
		file10 = typo3conf/ext/qfq/Resources/Public/JavaScript/fabric.min.js
      file11 = typo3conf/ext/qfq/Resources/Public/JavaScript/qfq.fabric.min.js
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	}

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.. _form-editor:
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FormEditor
----------
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Setup a *report* to manage all *forms*:

* Create a Typo3 page.
* Set the 'URL Alias' to `form` (default) or the individual defined value in parameter EDIT_FORM_PAGE (config.qfq.ini).
* Insert a content record of type *qfq*.
* In the bodytext insert the following code:
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::

	# If there is a form given by SIP: show
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	form={{form:SE}}
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	10 {
		# List of Forms: Do not show this list of forms if there is a form given by SIP.
		# Table header.
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		sql = SELECT CONCAT('{{pageId:T}}&form=form&') as _Pagen, '#', 'Name', 'Title', 'Table', '' FROM (SELECT 1) AS fake WHERE  '{{form:SE}}'=''
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		head = <table class="table table-hover qfq-table-50">
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		tail = </table>
		rbeg = <thead><tr>
		rend = </tr></thead>
		fbeg = <th>
		fend = </th>

		10 {
			# All forms
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			sql = SELECT CONCAT('{{pageId:T}}&form=form&r=', f.id) as _Pagee, f.id, f.name, f.title, f.tableName, CONCAT('form=form&r=', f.id) as _Paged FROM Form AS f ORDER BY f.name
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			rbeg = <tr>
			rend = </tr>
			fbeg = <td>
			fend = </td>
		}
	}

.. _config-qfq-ini:

config.qfq.ini
--------------

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+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
| Keyword                     | Example                                         | Description                                                                |
+=============================+=================================================+============================================================================+
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| DB_<n>_USER                 | DB_1_USER=qfqUser                               | Credentials configured in MySQL                                            |
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+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
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| DB_<n>_PASSWORD             | DB_1_PASSWORD=1234567890                        | Credentials configured in MySQL                                            |
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+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
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| DB_<n>_SERVER               | DB_1_SERVER=localhost                           | Hostname of MySQL Server                                                   |
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+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
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| DB_<n>_NAME                 | DB_1_NAME=qfq_db                                | Database name                                                              |
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+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
| DB_INIT                     | DB_INIT=set names utf8                          | Global init for using the database.                                        |
+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
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| DB_INDEX_DATA               | DB_INDEX_DATA = 1                               | Optional. Default: 1.                                                      |
+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
| DB_INDEX_QFQ                | DB_INDEX_QFQ = 1                                | Optional. Default: 1.                                                      |
+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
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| SQL_LOG                     | SQL_LOG=../../sql.log                           | Filename to log SQL commands: relative to <ext_dir> or absolute.           |
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+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
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| SQL_LOG_MODE                | SQL_LOG_MODE=modify                             | *all*: every statement will be logged - this might a lot.                  |
|                             |                                                 | *modify*: log only statements who change data.                             |
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+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
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| MAIL_LOG                    | SQL_LOG=../../mail.log                          | Filename to log `sendEmail` commands: relative to <ext_dir> or absolute.   |
+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
| SEND_E_MAIL_OPTIONS         | SEND_E_MAIL_OPTIONS="-o tls=yes"                | General options. Check: http://caspian.dotconf.net/menu/Software/SendEmail |
+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
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| SHOW_DEBUG_INFO             | SHOW_DEBUG_INFO=auto                            | FE - Possible values: yes|no|auto|download. For 'auto': If a BE User is    |
|                             |                                                 | logged in, a debug information will be shown on the FE.                    |
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+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
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| REDIRECT_ALL_MAIL_TO        | REDIRECT_ALL_MAIL_TO=john@doe.com               | If set, redirect all QFQ generated mails (Form, Report) to the specified.  |
+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
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| CSS_LINK_CLASS_INTERNAL     | CSS_LINK_CLASS_INTERNAL=internal                | CSS class name of links which points to internal tagets                    |
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+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
| CSS_LINK_CLASS_EXTERNAL     | CSS_LINK_CLASS_EXTERNAL=external                | CSS class name of links which points to internal tagets                    |
+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
| CSS_CLASS_QFQ_CONTAINER     |CSS_CLASS_QFQ_CONTAINER=container                | QFQ with own Bootstrap: 'container'.                                       |
|                             |                                                 | QFQ already nested in Bootstrap of mainpage: <empty>                       |
+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
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| CSS_CLASS_QFQ_FORM          | CSS_CLASS_QFQ_FORM=qfq-color-base               | Wrap around QFQ 'Form'                                                     |
+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
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| CSS_CLASS_QFQ_FORM_PILL     |CSS_CLASS_QFQ_FORM_PILL=qfq-color-grey-1         | Wrap around title bar for pills: CSS Class, typically a background color   |
+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
| CSS_CLASS_QFQ_FORM_BODY     |CSS_CLASS_QFQ_FORM_BODY=qfq-color-grey-2         | Wrap around formelements: CSS Class, typically a background color          |
+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
| DATE_FORMAT                 | DATE_FORMAT= yyyy-mm-dd                         | Possible options: yyyy-mm-dd, dd.mm.yyyy                                   |
+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
| FORM_DATA_PATTERN_ERROR     |FORM_DATA_PATTERN_ERROR=please check pa.         | Customizable error message used in validator.js. 'pattern' violation       |
+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
| FORM_DATA_REQUIRED_ERROR    |FORM_DATA_REQUIRED_ERROR=missing value           | Customizable error message used in validator.js. 'required' fields         |
+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
| FORM_DATA_MATCH_ERROR       |FORM_DATA_MATCH_ERROR=type error                 | Customizable error message used in validator.js. 'match' retype mismatch   |
+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
| FORM_DATA_ERROR             |FORM_DATA_ERROR=generic error                    | Customizable error message used in validator.js. 'no specific' given       |
+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
| FORM_BS_COLUMNS             | FORM_BS_COLUMNS=12                              | The whole form will be wrapped in 'col-md-??'. Default is 12 for 100%      |
+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
| FORM_BS_LABEL_COLUMNS       | FORM_BS_LABEL_COLUMNS = 3                       | Default number of BS columns for the 'label'-column                        |
+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
| FORM_BS_INPUT_COLUMNS       | FORM_BS_INPUT_COLUMNS = 6                       | Default number of BS columns for the 'input'-column                        |
+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
| FORM_BS_NOTE_COLUMNS        | FORM_BS_NOTE_COLUMNS = 3                        | Default number of BS columns for the 'note'-column                         |
+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
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| FORM_BUTTON_ON_CHANGE_CLASS | FORM_BUTTON_ON_CHANGE_CLASS=alert-info btn-info | Color for save button after modification                                   |
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+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
| BASE_URL_PRINT              | BASE_URL_PRINT=http://example.com               | URL where wkhtmltopdf will fetch the HTML (no parameter, those comes later)|
+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
| WKHTMLTOPDF                 | WKHTMLTOPDF=/usr/bin/wkhtmltopdf                | Binary where to find wkhtmltopdf.                                          |
+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
| EDIT_FORM_PAGE              | EDIT_FORM_PAGE = form                           | T3 Pagealias to edit a form.                                               |
+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
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| LDAP_1_RDN                  | LDAP_1_RDN='ou=Admin,ou=example,dc=com'         | Credentials for non-anonymous LDAP access. At the moment only one set of   |
+-----------------------------+-------------------------------------------------+ crendentials is supported.                                                 |
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| LDAP_1_PASSWORD             | LDAP_1_PASSWORD=mySecurePassword                |                                                                            |
+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
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| ESCAPE_TYPE_DEFAULT         | ESCAPE_TYPE_DEFAULT=m                           | All variables `{{...}}` get this escape class by default.                  |
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|                             |                                                 | See `variable-escape`_.                                                    |
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+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
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| SECURITY_VARS_HONEYPOT      | SECURITY_VARS_HONEYPOT = email,username,password| If empty: no check. All named variables will rendered as INPUT elements    |
+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
| SECURITY_ATTACK_DELAY       | SECURITY_ATTACK_DELAY = 5                       | If an attack is detected, sleep 'x' seconds and exit PHP process           |
+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
| SECURITY_SHOW_MESSAGE       | SECURITY_SHOW_MESSAGE = true                    | If an attack is detected, show a message                                   |
+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
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| SECURITY_GET_MAX_LENGTH     | SECURITY_GET_MAX_LENGTH = 50                    | GET vars longer than 'x' chars triggers an `attack-recognized`.            |
|                             |                                                 | `ExceptionMaxLength`_                                                      |
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+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
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| GFX_EXTRA_BUTTON_INFO_INLINE| <img src="info.png">                            | Image for `extraButtonInfo`_ (inline)                                      |
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+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
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| GFX_EXTRA_BUTTON_INFO_BELOW | <img src="info.png">                            | Image for `extraButtonInfo`_ (below)                                       |
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+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
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| EXTRA_BUTTON_INFO_POSITION  | SYSTEM_EXTRA_BUTTON_INFO_POSITION=below         | 'auto' (default) or 'below'. See `extraButtonInfo`_                        |
+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
| EXTRA_BUTTON_INFO_CLASS     | SYSTEM_EXTRA_BUTTON_INFO_CLASS=pull-right       | '' (default) or 'pull-right'. See `extraButtonInfo`_                       |
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+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
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| SAVE_BUTTON_TEXT            | SAVE_BUTTON_TEXT =                              | Default text on the form save button. Typically none.                      |
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+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
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| SAVE_BUTTON_TOOLTIP         | SAVE_BUTTON_TOOLTIP = save                      | Default tooltip on the form save button.                                   |
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+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
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| SAVE_BUTTON_CLASS           | SAVE_BUTTON_CLASS = btn btn-default navbar-btn  | Default Bootstrap CSS class for buttons on top of the form                 |
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+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
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| SAVE_BUTTON_GLYPH_ICON      | SAVE_BUTTON_GLYPH_ICON = glyphicon-ok           | Default Icon for the form save button                                      |
+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
| CLOSE_BUTTON_TEXT           | CLOSE_BUTTON_TEXT =                             | Default text on the form close button. Typically none.                     |
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+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
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| CLOSE_BUTTON_TOOLTIP        | CLOSE_BUTTON_TOOLTIP = close                    | Default tooltip on the form close button.                                  |
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+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
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| CLOSE_BUTTON_CLASS          | CLOSE_BUTTON_CLASS = btn btn-default navbar-btn | Default Bootstrap CSS class for buttons on top of the form                 |
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+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
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| CLOSE_BUTTON_GLYPH_ICON     | CLOSE_BUTTON_GLYPH_ICON = glyphicon-remove      | Default Icon for the form close button                                     |
+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
| DELETE_BUTTON_TEXT          | DELETE_BUTTON_TEXT =                            | Default text on the form delete button. Typically none.                    |
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+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
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| DELETE_BUTTON_TOOLTIP       | DELETE_BUTTON_TOOLTIP = delete                  | Default tooltip on the form delete button.                                 |
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+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
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| DELETE_BUTTON_CLASS         | DELETE_BUTTON_CLASS = btn btn-default navbar-btn| Default Bootstrap CSS class for buttons on top of the form                 |
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+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
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| DELETE_BUTTON_GLYPH_ICON    | DELETE_BUTTON_GLYPH_ICON = glyphicon-trash      | Default Icon for the form delete button                                    |
+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
| NEW_BUTTON_TEXT             | NEW_BUTTON_TEXT =                               | Default text on the form new button. Typically none.                       |
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+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
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| NEW_BUTTON_TOOLTIP          | NEW_BUTTON_TOOLTIP = new                        | Default tooltip on the form new button.                                    |
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+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
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| NEW_BUTTON_CLASS            | NEW_BUTTON_CLASS = btn btn-default navbar-btn   | Default Bootstrap CSS class for buttons on top of the form                 |
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+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
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| NEW_BUTTON_GLYPH_ICON       | NEW_BUTTON_GLYPH_ICON = glyphicon-plus          | Default Icon for the form new button                                       |
+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
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| DB_UPDATE                   | DB_UPDATE = auto                                | 'auto': apply DB Updates only if there is a newer version.                 |
|                             |                                                 | 'always': apply DB Updates always, especially play formEditor.sql every    |
|                             |                                                 | time QFQ is called - *not* recommended!                                    |
|                             |                                                 | 'never': never apply DB Updates.                                           |
+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
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| DIRTY_RECORD_TIMEOUT_SECONDS| DIRTY_RECORD_TIMEOUT_SECONDS = 900              | Timeout for record locking. After this time, a record will be replaced     |
+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
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| DOCUMENTATION_QFQ           | DOCUMENTATION_QFQ=http://docs.typo3.org...      | Link to the online documentation of QFQ. Every QFQ installation also       |
|                             |                                                 | contains a local copy: typo3conf/ext/qfq/Documentation/html/Manual.html    |
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+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
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| FILL_STORE_SYSTEM_BY_SQL    | FILL_STORE_SYSTEM_BY_SQL = {{!SELECT s.id AS ...| Specific values read from the database to fill the system store during QFQ |
|                             |                                                 | load. See `fillStoreSystemBySql`_ for a usecase.                           |
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+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
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| FORM_LANGUAGE_A_ID          | FORM_LANGUAGE_A__ID = 1                         | In Typo3 configured pageLanguage id. The number after the 'L' parameter.   |
| FORM_LANGUAGE_B_ID          |                                                 |                                                                            |
| FORM_LANGUAGE_C_ID          |                                                 |                                                                            |
| FORM_LANGUAGE_D_ID          |                                                 |                                                                            |
+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
| FORM_LANGUAGE_A_LABEL       | FORM_LANGUAGE_A_LABEL = english                 | Label shown in *Form editor*, on the 'basic' tab.                          |
| FORM_LANGUAGE_B_LABEL       |                                                 |                                                                            |
| FORM_LANGUAGE_C_LABEL       |                                                 |                                                                            |
| FORM_LANGUAGE_D_LABEL       |                                                 |                                                                            |
+-----------------------------+-------------------------------------------------+----------------------------------------------------------------------------+
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Example: *typo3conf/config.qfq.ini*

::

	; To get internal default values, inactivate the option by commenting (= ';') it.
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	DB_1_USER = qfqUser
	DB_1_SERVER = localhost
	DB_1_PASSWORD = 12345678
	DB_1_NAME = qfq_db
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	DB_INIT = set names utf8
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	; DB_INDEX_DATA = 1
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	; DB_INDEX_QFQ = 1
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	; SQL_LOG = sql.log
	; SQL_LOG_MODE = modify
	; SHOW_DEBUG_INFO = auto
	; REDIRECT_ALL_MAIL_TO = john.doe@example.com
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	CSS_LINK_CLASS_INTERNAL = internal
	CSS_LINK_CLASS_EXT = external
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	; CSS_CLASS_QFQ_CONTAINER =
	; CSS_CLASS_QFQ_FORM =
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	CSS_CLASS_QFQ_FORM_PILL = qfq-color-grey-1
	CSS_CLASS_QFQ_FORM_BODY = qfq-color-grey-2
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	; DATE_FORMAT= yyyy-mm-dd
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	; TECHNICAL CONTACT = john@doe.com
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	; FORM_DATA_PATTERN_ERROR =
	; FORM_DATA_REQUIRED_ERROR =
	; FORM_DATA_MATCH_ERROR =
	; FORM_DATA_ERROR =
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	; FORM_BS_COLUMNS = 12
	; FORM_BS_LABEL_COLUMNS = 3
	; FORM_BS_INPUT_COLUMNS = 6
	; FORM_BS_NOTE_COLUMNS = 3
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	BASE_URL_PRINT=http://example.com/
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	WKHTMLTOPDF=/usr/bin/wkhtmltopdf
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	; EDIT_FORM_PAGE = form
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	; LDAP_1_RDN='ou=Admin,dc=example,dc=com'
	; LDAP_1_PASSWORD=mySecurePassword
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	; ESCAPE_TYPE_DEFAULT=m
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	; SECURITY_VARS_HONEYPOT=email,username,password
	; SECURITY_ATTACK_DELAY=5
	; SECURITY_SHOW_MESSAGE=true
	; SECURITY_GET_MAX_LENGTH=50
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	;SAVE_BUTTON_TEXT =
	;SAVE_BUTTON_TOOLTIP = save
	;SAVE_BUTTON_CLASS = btn btn-default navbar-btn
	;SAVE_BUTTON_GLYPH_ICON = glyphicon-ok

	;CLOSE_BUTTON_TEXT =
	;CLOSE_BUTTON_TOOLTIP = close
	;CLOSE_BUTTON_CLASS = btn btn-default navbar-btn
	;CLOSE_BUTTON_GLYPH_ICON = glyphicon-remove

	;DELETE_BUTTON_TEXT =
	;DELETE_BUTTON_TOOLTIP = delete
	;DELETE_BUTTON_CLASS = btn btn-default navbar-btn
	;DELETE_BUTTON_GLYPH_ICON = glyphicon-trash

	;NEW_BUTTON_TEXT =
	;NEW_BUTTON_TOOLTIP = new
	;NEW_BUTTON_CLASS = btn btn-default navbar-btn
	;NEW_BUTTON_GLYPH_ICON = glyphicon-plus

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	; auto | always | never
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	;DB_UPDATE = auto
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	;RECORD_LOCK_TIMEOUT_SECONDS = 900
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	; Local Documentation (doc fits to installed version):  typo3conf/ext/qfq/Documentation/html/Manual.html
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	;DOCUMENTATION_QFQ = https://docs.typo3.org/typo3cms/drafts/github/T3DocumentationStarter/Public-Info-053/Manual.html

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	;FILL_STORE_SYSTEM_BY_SQL_1 = 'SELECT s.id AS periodId FROM Period AS s WHERE s.start<=NOW() ORDER BY s.start DESC LIMIT 1'
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	; Important: only define an error message, if QFQ should stop running in case of an error or not exact 1 record.
	;FILL_STORE_SYSTEM_BY_SQL_ERROR_MSG_1 = No current period found
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	;FORM_LANGUAGE_A_ID = 1
	;FORM_LANGUAGE_A_LABEL = english
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	;GFX_EXTRA_BUTTON_INFO_INLINE = <img src='info.png'>
	;GFX_EXTRA_BUTTON_INFO_BELOW = <img src='info.png'>
	;EXTRA_BUTTON_INFO_POSITION = auto | below
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	;EXTRA_BUTTON_INFO_CLASS = pull-right
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.. _`CustomVariables`:

Custom variables
^^^^^^^^^^^^^^^^
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It's also possible to setup custom variables in `config.qfq.ini`.

E.g. to setup a contact address and reuse the information inside your installation do:

 * `config.qfq.in`::

		ADMINISTRATIVE_CONTACT = john@doe.com
		ADMINISTRATIVE_ADDRESS = John Doe, Hollywood Blvd. 1, L.A.
		ADMINISTRATIVE_NAME = John Doe

 * Somewhere in a `Form` or in `Report`::

      {{ADMINISTRATIVE_CONTACT:Y}}, {{ADMINISTRATIVE_ADDRESS:Y}}, {{ADMINISTRATIVE_NAME}}

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.. _`fillStoreSystemBySql`:
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Fill STORE_SYSTEM by SQL
^^^^^^^^^^^^^^^^^^^^^^^^
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A specified SELECT statement in `config.qfq.ini`_ in variable `FILL_STORE_SYSTEM_BY_SQL_1` (or `FILL_STORE_SYSTEM_BY_SQL_2`,
or `FILL_STORE_SYSTEM_BY_SQL_3`) will be fired. The query should have 0 (nothing happens) or 1 row. All columns will be
**added** to the existing STORE_SYSTEM. Existing variables will be overwritten. Be careful not to overwrite system values.
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This option is useful to make generic custom values, saved in the database, accessible to all QFQ Report and Forms.
Access such variables via `{{<varname>:Y}}`.

In case QFQ should stop working if a given query does not select exact one record (e.g. a missing period), define an
error message: ::

  FILL_STORE_SYSTEM_BY_SQL_1 = "SELECT name FROM Person WHERE name='Doe'"
  FILL_STORE_SYSTEM_BY_SQL_ERROR_MSG_1 = Too many or to few "Doe's" in our database
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.. _`periodId`:
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periodId
''''''''

This is

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* a usecase, implemented via `fillStoreSystemBySql`_,
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* a way to access `Period.id` with respect to the current period (the period itself is custom defined).
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After a full QFQ installation, three things are prepared:

* a table `Period` (extend / change it to your needs, fill them with your periods),
* one sample record in table `Period`,
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* in `config.qfq.ini`_ the default definition of `FILL_STORE_SYSTEM_BY_SQL_1` will set the variable `periodId` during QFQ load.
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Websites, delivering semester data, schoolyears schedules, or any other type or periods, often need an index to the
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*current* period.
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In `config.qfq.ini`: ::

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	FILL_STORE_SYSTEM_BY_SQL_1 = 'SELECT id AS periodId FROM Period WHERE start<=NOW() ORDER BY start DESC LIMIT 1'
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a variable 'periodId' will automatically computed and filled in STORE SYSTEM. Access it via `{{periodId:Y0}}`.
To get the name and current period: ::

  SELECT name, ' / ', start FROM Period WHERE id={{periodId:Y0}}

Typically, it's necessary to offer a 'previous' / 'next' link. In this example, the STORE SIP holds the new periodId: ::

  SELECT CONCAT('id={{pageId:T}}&periodId=', {{periodId:SY0}}-1, '|Next') AS _Page, ' ', name, ' ', CONCAT('id={{pageId:T}}&periodId=', {{periodId:SY0}}+1, '|Next') AS _Page FROM Period AS s WHERE s.id={{periodId:SY0}}

Take care for minimum and maximum indexes (do not render the links if out of range).

.. _`DbUserPrivileges`:
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DB USER privileges
^^^^^^^^^^^^^^^^^^

The specified DB User needs privileges to the database of at least: SELECT / INSERT / UPDATE / DELETE / SHOW.

To apply automatically QFQ-'DB UPDATE' the following rights are mandatory too: CREATE / ALTER

To get access to the Typo3 installation, 'dbuser' should also have acces to the Typo3 Database with at least SELECT / INSERT / UPDATE / DELETE.



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.. _`ExceptionMaxLength`:

Exception for SECURITY_GET_MAX_LENGTH
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

If it is necessary to use a GET variable which exceeds SECURITY_GET_MAX_LENGTH limit, name the variable with '_<num>' at
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the end. E.g. `my_long_variable_130`. Such a variable has an allowed length of 130 chars. Access the variable as
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usual with the variable name: `{{my_long_variable_130:C:...}}`.


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.. _local-documentation:

Local Documentation
-------------------

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A HTML rendered version is available under: <your site>/typo3conf/ext/qfq/Documentation/html/Index.html
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If you get a 'Page forbidden / not found' there might be some Webserver restrictions. E.g. the Typo3 example of `.htaccess`
in the Typo3 installation folder will forbid access to any extension documentation (which is a good idea on a productive
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server). For a development server instead, deactivate the forbid rule of 'documentation'. In `.htaccess` (snippet from
Typo3 7.6 _.htaccess): ::
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  production:   RewriteRule (?:typo3conf/ext|typo3/sysext|typo3/ext)/[^/]+/(?:Configuration|Resources/Private|Tests?|Documentation|docs?)/ - [F]
  development:  RewriteRule (?:typo3conf/ext|typo3/sysext|typo3/ext)/[^/]+/(?:Configuration|Resources/Private|Tests?|docs?)/ - [F]
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.. _concept:

Concept
=======

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SIPs
----

The following is a technical background information. Not needed to just use QFQ.

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The SIPs (=Server Id Pairs) are uniq timestamps, created/registered on the fly for a specific browser session (=user). Every SIP is
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registered on the server (= stored in a PHP Session) and contains one or more key/value pairs. The key/value pairs never leave
the server. The SIPs will be used:

* to protect values not to be spoofed by anyone,
* to protect values not to be altered by anyone,
* to grant access, e.g.:

  * load and save forms,
  * upload files,
  * download files,
  * PHP AJAX pages.

SIPs becomes invalid, as soon as the current browser session is destroyed. The client (= user) can't manipulate the content
of SIPs - it's only possible to reuse already registered SIPs by the user, who already owns the session.
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Access privileges
-----------------

The Typo3 FE Groups can be used to implement access privileges. Such groups are assigned to
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* Typo3 FE users,
* Typo3 pages,
* and/or Typo3 content records (e.g. QFQ records).

This will be used for general page structure privileges.

A `record base` privileges controlling (e.g. which user can edit
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which person record) will be implicit configured, by the way that records are viewable / editable (or not) through
SQL in the specific QFQ tt-content statements.
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Typo3 QFQ content element
-------------------------

Insert one or more QFQ content elements on a Typo3 page. Specify column and language per content record as wished.

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The title of the QFQ content element will not be rendered on the frontend. It's only visible to the webmaster in the
backend for orientation.
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QFQ Keywords (Bodytext)
^^^^^^^^^^^^^^^^^^^^^^^

 +-------------------+---------------------------------------------------------------------------------+
 | Name              | Explanation                                                                     |
 +===================+=================================================================================+
 | form              | Formname defined in ttcontent record bodytext                                   |
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 |                   | - Fix. E.g.: **form = person**                                                  |
 |                   | - by SIP: **form = {{form}}**                                                   |
 |                   | - by SQL: **form = {{SELECT c.form FROM conference AS c WHERE c.id={{a:C}} }}** |
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 +-------------------+---------------------------------------------------------------------------------+
 | r                 | <record id> The form will load the record with the specified id                 |
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 |                   | - Variants: **r = 123**, by SQL: **r = {{SELECT ...}}**                         |
 |                   | - If not specified, the default is '0'                                          |
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 +-------------------+---------------------------------------------------------------------------------+
 | <level>.db        | Select a DB. Only necessary if a different than the standard DB should be used. |
 +-------------------+---------------------------------------------------------------------------------+
 | <level>.fbeg      | Start token for every field (=column)                                           |
 +-------------------+---------------------------------------------------------------------------------+
 | <level>.fend      | End token for every field (=column)                                             |
 +-------------------+---------------------------------------------------------------------------------+
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 | <level>.shead     | Static start token for whole <level>, independent if records are selected       |
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 |                   | Shown before `head`.                                                            |
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 +-------------------+---------------------------------------------------------------------------------+
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 | <level>.stail     | Static end token for whole <level>, independent if records are selected.        |
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 |                   | Shown after `tail`.                                                             |
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 +-------------------+---------------------------------------------------------------------------------+
 | <level>.head      | Dynamic start token for whole <level>. Only if at least one record is select.   |
 +-------------------+---------------------------------------------------------------------------------+
 | <level>.tail      | Dynamic end token for whole <level>. Only if at least one record is select.     |
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 +-------------------+---------------------------------------------------------------------------------+
 | <level>.rbeg      | Start token for row.                                                            |
 +-------------------+---------------------------------------------------------------------------------+
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 | <level>.rbgd      | Alternating (per row) token.                                                    |
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 +-------------------+---------------------------------------------------------------------------------+
 | <level>.rend      | End token for row. Will be rendered **before** subsequent levels are processed  |
 +-------------------+---------------------------------------------------------------------------------+
 | <level>.renr      | End token for row. Will be rendered **after** subsequent levels are processed   |
 +-------------------+---------------------------------------------------------------------------------+
 | <level>.rsep      | Seperator token between rows                                                    |
 +-------------------+---------------------------------------------------------------------------------+
 | <level>.fsep      | Seperator token between fields (=columns)                                       |
 +-------------------+---------------------------------------------------------------------------------+
 | <level>.sql       | SQL Query                                                                       |
 +-------------------+---------------------------------------------------------------------------------+
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 | <level>.althead   | If <level>.sql is empty, these token will be rendered.                          |
 +-------------------+---------------------------------------------------------------------------------+
 | <level>.altsql    | If <level>.sql is empty, these query will be fired. No sub queries.             |
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 |                   | Shown after `althead`                                                           |
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 +-------------------+---------------------------------------------------------------------------------+
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 | debugShowBodyText | If='1' and config.qfq.ini:*SHOW_DEBUG_INFO = yes*, shows a tooltip with bodytext|
 +-------------------+---------------------------------------------------------------------------------+
 | sqlLog            | Overwrites config.qfq.ini: `SQL_LOG`_ . Only affects `Report`, not `Form`.      |
 +-------------------+---------------------------------------------------------------------------------+
 | sqlLogMode        | Overwrites config.qfq.ini: `SQL_LOG_MODE`_ . Only affects `Report`, not `Form`. |
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 +-------------------+---------------------------------------------------------------------------------+

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Databases
---------

A Typo3 / QFQ Installation needs at least two databases. One for the Typo3 installation and one for QFQ.

QFQ itself can be separated in 'QFQ system' and 'QFQ data' databases, if necessary (than at least three databases are needed).
Furthermore a `Form` can operate on any additional database, specified per `Form`.parameter.dbIndex and configured via `config.qfq.ini`_.

* Option 'A' is the most simple and commonly used.
* Option 'B' separate the T3 and QFQ databases on two database hosts.
* Option 'C' is like 'B' but with a shared 'QFQ data'-database between three 'Typo3 / QFQ' instances.
* Further variants are possible.

+---+----------------+--------------+-------------------------------+------------------------------+----------------------------------+
|   | Domain         | Website Host | T3                            | QFQ system                   | QFQ data                         |
+===+================+==============+===============================+==============================+==================================+
| A | standalone.edu | 'w'          | <dbHost>, <dbname>_t3, <dbnameSingle>_db                                                        |
+---+----------------+--------------+-------------------------------+------------------------------+----------------------------------+
| B | appB1.edu      | 'wApp'       | <dbHostApp>, <dbnameB1>_t3    | <dbHostB1>, <dbnameApp>_db                                      |
+---+----------------+--------------+-------------------------------+------------------------------+----------------------------------+
| B | appB2.edu      | 'wApp'       | <dbHostApp>, <dbnameB2>_t3    | <dbHostB2>, <dbnameApp>_db                                      |
+---+----------------+--------------+-------------------------------+------------------------------+----------------------------------+
| C | appC1.edu      | 'wAppC'      | <dbHostAppC>, <dbnameC1>_t3   | <dbHostC>, <dbnameSysC1>_db  | <dbHostData>_db, <dbNameData>_db |
+---+----------------+--------------+-------------------------------+------------------------------+----------------------------------+
| C | appC2.edu      | 'wAppC'      | <dbHostAppC>, <dbnameC2>_t3   | <dbHostC>, <dbnameSysC2>_db  | <dbHostData>_db, <dbNameData>_db |
+---+----------------+--------------+-------------------------------+------------------------------+----------------------------------+
| C | appC3.edu      | 'wAppC3'     | <dbHostAppC3>, <dbnameC3>_t3  | <dbHostC3>, <dbnameSysC3>_db | <dbHostData>_db, <dbNameData>_db |
+---+----------------+--------------+-------------------------------+------------------------------+----------------------------------+

In `config.qfq.ini`_ mutliple database credentials can be prepared. Mandatory is at least one credential setup like
`DB_1_USER`, `DB_1_SERVER`, `DB_1_PASSWORD`, `DB_1_NAME`. The number '1' indicates the `dbIndex`. Increment the number
to specify further database credential setups.

Often the `DB_1_xxx` is identically to the used Typo3 database credentials.

If not explicit specified, 'QFQ system' and 'QFQ database' will use the same database with the same credentials (setup 'A').

To define separate 'QFQ data' and 'QFQ system', in `config.qfq.ini`_ define  `DB_1_USER`, ... (e.g. 'QFQ data') and `DB_2_USER`,
... (e.g. 'QFQ system') and specify the assignment::

	DB_INDEX_DATA = 1
	DB_INDEX_QFQ = 2

To let a form operate (show, load and save) on a different database, use `Form.parameter.dbIndexData` (see `form-parameter`_).

Different QFQ versions, shared database
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

When using different QFQ versions and a shared 'QFQ data'-database, there is some risk of conflicting
'QFQ system' tables. Best is to always use the same QFQ version on all instances.

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.. _debug:

Debug
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=====

SQL Logging
-----------
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File: `config.qfq.ini`_

.. _SQL_LOG:

* *SQL_LOG*

  * Filename where to log SQL queries and statistical data.
  * File is relative to the extension directory or absolute (starting with '/').
  * Content: SQL queries and timestamp, formName/formId, fe_user, success, affected rows, newly created record
    id's and accessed from IP.
  * The global setting can be overwritten by defining `sqlLog` inside of a QFQ tt-content record.
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.. _SQL_LOG_MODE:

* *SQL_LOG_MODE = all|modify|error|none*

  * *all*: logs every SQL statement.
  * *modify*: logs only statements who might potentially change data.
  * *error*: logs only queries which generate SQL errors.
  * *none*: no query logging at all.
  * The global setting can be overwritten by defining `sqlLogMode` inside of a QFQ tt-content record.

* *SHOW_DEBUG_INFO = [yes|no|auto],[download]*

  If active, displays additional information in the Frontend (FE). This is typically helpful during development.
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  * *yes*:

    * Form:

      * For every internal link/button, show tooltips with decoded SIP on mouseover.
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      * Shows an 'Edit form'-button (wrench symbol) on a form. The link points to the T3 page with the :ref:`form-editor`.
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    * Report: Will be configured per tt-content record.

      *debugShowBodyText = 1*

  * *no*: No debug info.

  * *auto*: Depending if there is a Typo3 BE session, set internally:

    * *SHOW_DEBUG_INFO = yes*  (BE session exist)
    * *SHOW_DEBUG_INFO = no*   (no BE session)

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  * *download*:

    * During a download (especially by using wkhtml), temporary files are not deleted automatically. Also the
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      `wkhtmltopdf` and `pdftk` commandlines will be logged to `SQL_LOG`_. Use this only to debug problems on download.
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.. _REDIRECT_ALL_MAIL_TO:

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Redirect all mail to (catch all)
--------------------------------

File: `config.qfq.ini`_

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* *REDIRECT_ALL_MAIL_TO=john@doe.com*

  * During the development, it might be helpful to configure a 'catch all' email address, which QFQ uses as the final receiver
    instead of the original intended one.

  * The setting will:

    * Replace the 'To' with the configured one.
    * Clear 'CC' and 'Bcc'
    * Write a note and the original configured receiver at the top of the email body.
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.. _variables:

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Variable
========
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Most elements of a Form, FormElement or Report might contain (QFQ) variables. Such variables are surrounded by
double curly braces. Three different types of functionality are provided. Access to:
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* `store-variables`_
* `sql-variables`_
* `column-variables`_
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Some examples, including nesting::
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  # Store
  #---------------------------------------------
  {{r}}
  {{index:FS}}
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  {{name:FS:alnumx:s:my default}}
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  # SQL
  #---------------------------------------------
  {{SELECT name FROM person WHERE id=1234}}
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  # Columns
  #---------------------------------------------
  {{10.pId}}
  {{10.20.pId}}
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  # Nesting
  #---------------------------------------------
  {{SELECT name FROM person WHERE id={{r}} }}
  {{SELECT name FROM person WHERE id={{key1:C:alnumx}} }} # explained below
  {{SELECT name FROM person WHERE id={{SELECT id FROM pf LIMIT 1}} }} # it's more efficient to use only one query
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  * *{{ SELECT "Hello World"   }}* becomes *{{SELECT "Hello World"}}*
  * *{{ varname   }}* becomes *{{varname}}*
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Types
-----
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.. _`store-variables`:
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Store variables
^^^^^^^^^^^^^^^
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Syntax:  *{{VarName[:<store / prio>[:<sanitize class>[:<escape>[:<default>]]]]}}*
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* Example::
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  {{pId}}
  {{pId:FSE}}
  {{pId:FSE:digit}}
  {{name:FSE:alnumx:m}}
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  {{name:FSE:alnumx:m:John Doe}}
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* Zero or more stores might be specified to be searched for the given VarName.
* If no store is specified, the by default searched stores are: **FSRVD** (=FORM > SIP > RECORD > VARS > DEFAULT).
* If the VarName is not found in one store, the next store is searched,  up to the last specified store.
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* If the VarName is not found and a default value is given, the default is returned.
* If no value is found, nothing is replaced - the string '{{<VarName>}}' remains.
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* If anywhere along the line an empty string is found, this **is** a value: therefore, the search will stop.
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 * `store`_
 * `variable-escape`_
 * `sanitize-class`_
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.. _`sql-variables`:
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SQL variables
^^^^^^^^^^^^^
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* The detection of an SQL command is case *insensitive*.
* Leading  whitespace will be skipped.
* The following commands are interpreted as SQL commands:
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  * SELECT
  * INSERT, UPDATE, DELETE, REPLACE, TRUNCATE
  * SHOW, DESCRIBE, EXPLAIN, SET
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* A SQL Statement might contain parameters, including additional SQL statements. Inner SQL queries will be executed first.
* All variables will be substituted one by one from inner to outer.
* The number of variables inside an input field or a SQL statement is not limited.
* A resultset of a SQL statement will be imploded over all: concat all columns of a row, concat all rows - there is no glue string.
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* Example::
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  {{SELECT id, name FROM Person}}
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  {{SELECT id, name, IF({{feUser:T0}}=0,'Yes','No')  FROM Person WHERE id={{r:S}} }}
  {{SELECT id, city FROM Address AS adr WHERE adr.accId={{SELECT id FROM Account AS acc WHERE acc.name={{feUser:T0}} }} }}
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* Special case for `SELECT` input fields and FormElement.type=action `sqlValidate`. To deliver a result array specify an '!' before the SELECT: ::
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   {{!SELECT ...}}
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.. _`column-variables`:
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Column variables
^^^^^^^^^^^^^^^^

Syntax:  *{{<level>.<column>}}*

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Only used in report to access outer columns. See `access-column-values`_ and `syntax-of-report`_.
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There might be name conflicts between VarName / SQL keywords and <line identifier>. QFQ checks first for '<level>',
than for 'SQL keywords' and than for 'VarNames' in stores.
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All types might be nested with each other. There is no limit of nesting variables.

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Very specific: Also, it's possible that the content of a variable is again (including curly braces) a variable - this
is sometimes used in text templates, where the template is retrieved from a record and
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specific locations in the text will be (automatically by QFQ) replaced by values from other sources.

.. _`sanitize-class`:
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Sanitize class
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--------------

* If a value violates a parameter sanitize class, the value becomes an empty string.
* Per store there is a default if sanitizing applies and if yes, which class.

  * Store *C* (Client=Browser) and store *F* (Form) will be sanitized with 'digit'.
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* All `predefined-variable-names`_ have a specific default sanitize class. For these variables, it's not necessary
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  to specify a sanitize class.
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* All other variables (Store: C, F) get by default the sanitize class defined in the corresponding form. If not defined,
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  the default class is 'digit'.
* A default sanitize class can be overwritten by individual definition: *{{a:C:all}}*
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* If there is a sanitized class specified, it applies to all given stores.

For QFQ variables and FormElements:
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+------------------+------+-------+-----------------------------------------------------------------------------------------+
| Name             | Form | Query | Pattern                                                                                 |
+==================+======+=======+=========================================================================================+
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| **alnumx**       | Form | Query | [A-Za-z][0-9]@-_.,;: /() ÀÈÌÒÙàèìòùÁÉÍÓÚÝáéíóúýÂÊÎÔÛâêîôûÃÑÕãñõÄËÏÖÜŸäëïöüÿç            |
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+------------------+------+-------+-----------------------------------------------------------------------------------------+
| **digit**        | Form | Query | [0-9]                                                                                   |
+------------------+------+-------+-----------------------------------------------------------------------------------------+
| **numerical**    | Form | Query | [0-9.-+]                                                                                |
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+------------------+------+-------+-----------------------------------------------------------------------------------------+
| **allbut**       | Form | Query | All characters allowed, but not [ ]  { } % & \ #. The used regexp: '^[^\[\]{}%&\\#]+$', |
+------------------+------+-------+-----------------------------------------------------------------------------------------+
| **all**          | Form | Query | no sanitizing                                                                           |
+------------------+------+-------+-----------------------------------------------------------------------------------------+


Only in FormElement:

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+------------------+------+-------+-----------------------------------------------------------------------------------------+
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| **email**        | Form | Query | [a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\\.[a-zA-Z]{2,}                                         |
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+------------------+------+-------+-----------------------------------------------------------------------------------------+
| **min|max**      | Form |       | Compares the value against an lower and upper limit (numeric or string).                |
+------------------+------+-------+-----------------------------------------------------------------------------------------+
| **min|max date** | Form |       | Compares the value against an lower and upper date or datetime.                         |
+------------------+------+-------+-----------------------------------------------------------------------------------------+
| **pattern**      | Form |       | Compares the value against a regexp.                                                    |
+------------------+------+-------+-----------------------------------------------------------------------------------------+