multiSql selects no records: a) customizable message, b) throw error on save().

Documentation/Manual.rst

@@ -4354,14 +4354,25 @@ Multi Form
 ----------
 
 `Multi Forms` are like a regular form with the difference that the shown FormElements are repeated for *each* selected record
-(defined by `multiformSql`).
+(defined by `multiSql`).
+
+
++------------------+----------------------------------+------------------------------------------------+
+| Name             |                                  |                                                |
++==================+==================================+================================================+
+| multiSql         | {{!SELECT id, name FROM Person}} |  Query to select MulitForm records             |  
++------------------+----------------------------------+------------------------------------------------+
+| multiMgsNoRecord | Default: No data                 | Message shown if `multiSql` selects no records |
++------------------+----------------------------------+------------------------------------------------+
+
+
 
 The Form is shown as a HTML table.
 
-* `multiFormSql`: Selects the records where the defined FormElements will work on each.
+* `multiSql`: Selects the records where the defined FormElements will work on each.
 
   * A uniq column 'id' or '_id' (not shown) is mandatory and has to reflect an existing record id in table `primary table`.
-  * Additional columns, defined in `multiFormSql`, will be shown on the form in the same line, before the FormElements.
+  * Additional columns, defined in `multiSql`, will be shown on the form in the same line, before the FormElements.
 `
 
 Simple
@@ -4374,7 +4385,7 @@ General:
 Form:
 
 * Per row, the STORE_RECORD is filled with the whole record of the primary table, referenced
-  by `multiFormSql.id`.
+  by `multiSql.id`.
 
 FormElement:
 
@@ -4385,8 +4396,9 @@ FormElement:
 Advanced
 ========
 
-* The FormElement.name do not have to be a column of the primary table.
-* The insert/update/delete SQL statement (of each non-primary table column) has to be individually defined.
+* The `FormElement.name` do not have to be a column of the primary table.
+* If `FormElement.name` is not a column of the primary table, the insert/update/delete SQL statement has to be
+  extra defined.
 
 
 .. _multiple-languages:

extension/Classes/Core/AbstractBuildForm.php

@@ -221,8 +221,7 @@ abstract class AbstractBuildForm {
 
         // No rows: nothing to do.
         if (empty($parentRecords)) {
-            //TODO Meldung konfigurierbar machen.
-            return 'No data';
+            return $this->formSpec[F_MULTI_MSG_NO_RECORD];
         }
 
         // Check for 'id' or '_id' as column name

extension/Classes/Core/Constants.php

@@ -1040,6 +1040,8 @@ const F_ORDER_COLUMN = 'orderColumn';
 const F_ORDER_COLUMN_NAME = 'ord';
 
 const F_SHOW_ID_IN_FORM_TITLE = SYSTEM_SHOW_ID_IN_FORM_TITLE;
+const F_MULTI_MSG_NO_RECORD = 'multiMsgNoRecord';
+const F_MULTI_MSG_NO_RECORD_TEXT = 'No data';
 
 const F_REST_SQL_LIST = 'restSqlList';
 const F_REST_SQL_DATA = 'restSqlData';

extension/Classes/Core/QuickFormQuery.php

@@ -1438,6 +1438,7 @@ class QuickFormQuery {
         Support::setIfNotSet($formSpec, F_ENTER_AS_SUBMIT, $this->store->getVar(SYSTEM_ENTER_AS_SUBMIT, STORE_SYSTEM));
         Support::setIfNotSet($formSpec, F_SESSION_TIMEOUT_SECONDS, $this->store->getVar(SYSTEM_SESSION_TIMEOUT_SECONDS, STORE_SYSTEM));
         Support::setIfNotSet($formSpec, F_FE_REQUIRED_POSITION, F_FE_REQUIRED_POSITION_LABEL_RIGHT);
+        Support::setIfNotSet($formSpec, F_MULTI_MSG_NO_RECORD, F_MULTI_MSG_NO_RECORD_TEXT);
 
         // In case there is no F_MODE defined on the form, check if there is one in STORE_SIP.
         if ($formSpec[F_MODE] == '') {

extension/Classes/Core/Save.php

@@ -75,11 +75,11 @@ class Save {
     public function process() {
         $rc = 0;
 
-        if ($this->formSpec[F_MULTI_SQL] !== '') {
-            $rc = $this->saveMultiForm();
-        } else {
+        if ($this->formSpec[F_MULTI_SQL] == '') {
             $recordId = $this->store->getVar(SIP_RECORD_ID, STORE_SIP . STORE_ZERO);
             $rc = $this->elements($recordId);
+        } else {
+            $rc = $this->saveMultiForm();
         }
 
         return $rc;
@@ -96,10 +96,12 @@ class Save {
 
         $parentRecords = $this->evaluate->parse($this->formSpec[F_MULTI_SQL], ROW_REGULAR);
 
-        // No rows: nothing to do.
+        // No rows: This must be an error, cause MultiForms must have at least one record.
         if (empty($parentRecords)) {
-            //TODO Meldung konfigurierbar machen.
-            return 'No data';
+            throw new \UserFormException(
+                json_encode([ERROR_MESSAGE_TO_USER => $this->formSpec[F_MULTI_MSG_NO_RECORD],
+                    ERROR_MESSAGE_TO_DEVELOPER => 'Query selects no records: ' . $this->formSpec[F_MULTI_SQL]]),
+                ERROR_MISSING_EXPECT_RECORDS);
         }
 
         // Check for 'id' or '_id' as column name