Symfony2: How to find out the form errors

How to find out the form errors in Symfony2. Just add that code to your Controller:

if ($form->isValid()) {
...

} else {
    foreach($form->getChildren() as $child) {
        foreach( $child->getErrors() as $error) {
            print($error->getMessageTemplate()); 
        }
    }
}

It takes into consideration only the errors of the form fields. If you want to check errors of the form too, add that:

foreach ($form->getErrors() as $error) {
    print($error->getMessageTemplate());
}

How to found out extra fields in Symfony2 form?

If you encounter this error message while working with Symfony2 forms, follow my advice.

This form should not contain extra fields.

This way to find out the fields that are considered "extra" is very simple. I use the code quite frequently. Here it is:

$data = $request->request->all();

print("REQUEST DATA<br/>");
foreach ($data as $k => $d) {
    print("$k: <pre>"); print_r($d); print("</pre>");
}

$children = $form->all();

print("<br/>FORM CHILDREN<br/>");
foreach ($children as $ch) {
    print($ch->getName() . "<br/>");
}

$data = array_diff_key($data, $children);
//$data contains now extra fields

print("<br/>DIFF DATA<br/>");
foreach ($data as $k => $d) {
    print("$k: <pre>"); print_r($d); print("</pre>");
}
...
$form->bind($data);

Have a nice day!

How to get a form name from the twig-template in Symfony2?

It's pretty easy.

{{ form.vars.name }}

ACL - access control list

An access control list (ACL), with respect to a computer file system, is a list of permissions attached to an object. An ACL specifies which users or system processes are granted access to objects, as well as what operations are allowed on given objects. Each entry in a typical ACL specifies a subject and an operation. For instance, if a file has an ACL that contains (Alice, delete), this would give Alice permission to delete the file. (c) wikipedia There is a useful article from Symfony tutorial with good explanation http://symfony.com/doc/current/cookbook/security/acl_advanced.html