Proposal: default to false for CheckableTypes with null values

[tegola]

Since unchecked checkboxes are not posted (as per html spec), and since the Form class has the handy feature of returning null values when a field is not present in the POST, I find myself doing this in every form:

public function alterFieldValues(array &$values)
{
	$checkboxNames = ['name1', 'name2', 'name3'];

	foreach ($checkboxNames as $name) {
		if ($values[$name] == null) {
			$values[$name] = false;
		}
	}
}

Basically, I'm converting all known checkbox fields that are null to false. Having the Form class do this automatically would be great.

What do you think?

[kristijanhusak]

@tegola looks like a good idea, but i would like to make it optional, just because of the BC. Will you create a PR to add that feature?

[tegola]

Sorry for the delay.
I don't think I have the knowledge to do it, I couldn't find the time to see how the package works internally.

Where should I put the option and the necessary code to alter the form values?