how to return json encoded form errors in symfony

Question

I want to create a webservice to which I submit a form, and in case of errors, returns a JSON encoded list that tells me which field is wrong.

currently I only get a

Answer 1

This does the trick for me

 $errors = [];
 foreach ($form->getErrors(true, true) as $formError) {
    $errors[] = $formError->getMessage();
 }