Save.php: Fixed exception (file size, mime type) for non-existing uploads

extension/qfq/qfq/Save.php

@@ -327,6 +327,14 @@ class Save {
     /**
      * Process all Upload Formelements for the given $recordId. After processing &$formValues will be updated with the
      * final filenames.
+     *
+     * Constellation: # FILE OLD   FILE NEW     FILESIZE
+     *                1 none       none
+     *                2 none       new
+     *                3 exist      no change
+     *                4 delete     none
+     *                5 delete     new
+     *
      * @param $recordId
      * @throws CodeException
      * @throws DbException
@@ -339,6 +347,7 @@ class Save {
 
         $sip = new Sip(false);
         $newValues = array();
+        $vars=array();
 
         $formValues = $this->store->getStore(STORE_FORM);
         $primaryRecord = $this->store->getStore(STORE_RECORD); // necessary to check if the current formElement exist as a column of the primary table.
@@ -362,10 +371,27 @@ class Save {
             $column = $formElement[FE_NAME];
             $pathFileName = $this->doUpload($formElement, $formValues[$column], $sip, $modeUpload);
 
-            $pathFileNameTmp = empty($pathFileName) ? $primaryRecord[$column] : $pathFileName;
+            if($modeUpload==UPLOAD_MODE_DELETEOLD && $pathFileName==''){
+                $pathFileNameTmp='';  // see '4'
+            } else {
+                if (empty($pathFileName)) {
+                    $pathFileNameTmp = $primaryRecord[$column]; // see '3'
+                } else {
+                    $pathFileNameTmp = $pathFileName; // see '1,2,5'
+                }
+            }
+
             // Get latest file information
-            $vars = HelperFile::getFileStat($pathFileNameTmp);
-            $this->store->appendToStore($vars, STORE_VAR);
+
+            if($pathFileNameTmp=='') {
+                // No new upload and no existing: take care to remove previous upload file statistics.
+                $this->store->unsetVar(VAR_FILE_MIME_TYPE, STORE_VAR);
+                $this->store->unsetVar(VAR_FILE_SIZE, STORE_VAR);
+            } else {
+                $vars = HelperFile::getFileStat($pathFileNameTmp);
+                $this->store->appendToStore($vars, STORE_VAR);
+            }
+
 
             // If given: fire a sqlBefore query
             $this->evaluate->parse($formElement[FE_SQL_BEFORE]);