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

I am using this, it works quiet well:

/**
 * List all errors of a given bound form.
 *
 * @param Form $form
 *
 * @return array
 */
protected function getFormErrors(Form $form)
{
    $errors = array();

    // Global
    foreach ($form->getErrors() as $error) {
        $errors[$form->getName()][] = $error->getMessage();
    }

    // Fields
    foreach ($form as $child /** @var Form $child */) {
        if (!$child->isValid()) {
            foreach ($child->getErrors() as $error) {
                $errors[$child->getName()][] = $error->getMessage();
            }
        }
    }

    return $errors;
}