minor #7494 Minor fix in postLoad event (file uploading) (Prisacari Dmitrii)

This PR was submitted for the master branch but it was merged into the 2.7 branch instead (closes #7494).

Discussion
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Minor fix in `postLoad` event (file uploading)

Minor fix in `postLoad` event (file uploading). Added accessor methods in FileUploader class to make it possible to get $targetDir from outside.

Commits
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f16d3ed Minor fix in  event (file uploading)

Author: xabbuh

controller/upload_file.rst

@@ -247,6 +247,11 @@ logic to a separate service::
 
             return $fileName;
         }
+
+        public function getTargetDir()
+        {
+            return $this->targetDir;
+        }
     }
 
 Then, define a service for this class:
@@ -447,9 +452,13 @@ controller.
             {
                 $entity = $args->getEntity();
 
+                if (!$entity instanceof Product) {
+                    return;
+                }
+
                 $fileName = $entity->getBrochure();
 
-                $entity->setBrochure(new File($this->targetPath.'/'.$fileName));
+                $entity->setBrochure(new File($this->uploader->getTargetDir().'/'.$fileName));
             }
         }