Removing an element from a form will keep the inputfilter alive

[Damu112]

Steps to reproduce:

• Create a form with at least two elements
• Remove one element during runtime using $form->remove('name');
• Render, submit and validate the form

Result:

Validation will fail because the inputfilter (which is required by default) still remains in the form. However, as the element itself doesn't exist anylonger, no message will be generated ($form->getMessages(); will be empty in case of no other valdiation errors).

Workaround:

Also remove the inputfilter:

$form->remove('name');
$form->getInputFilter()->remove('name');

[blanchonvincent]

👍
@bakura10, input filter must be valid only with the elements in the forms.

[bakura10]

Use validation groups on forms for that.

[blanchonvincent]

@bakura10 Yeah agree, but you think the match must not have to exist ?
Validation group is used to limitied the validation (like an update), not for a normal use case, no ?

[Damu112]

Well, does it even make sense to keep the input definition in the form when the element is removed? No element -> no data -> no input required.

Or do I miss something here?

[weierophinney]

The form and the input filter are separate objects. To keep them informed of the state of one another requires further coupling. This is precisely why validation groups were created -- if you're changing the set of elements in the form, then you should also set the validation group so that it only includes what you plan to validate.