Zend Form: add error message after form validation

Question

How to add an error message to Zend Form element after the form was already validated?

I'm trying to add error mesages I get from Zend_Auth (now I'm displaying them using flashMessenger).

I tried something like this:

$form->getElement('username')->addErrorMessage('my message');

Answer 1

From the zend form documentation -

addErrorMessage($message): add an error message to display on form validation errors. You may call this more than once, and new messages are appended to the stack.

addError($message): add a message to the custom error messages stack and flag the form as invalid.

If your form is not marked as invalid, it probably doesn't show any error messages. Using addError($message) rather than addErrorMessage($message) will ensure that the element is also marked invalid.