Sylvain Wallez wrote:
Hi all,
I encountered a problem today: I have a form where a field is required or not depending on the value of another field. I wanted to control this using the validation (with a <wd:assert>) but couldn't as the validators aren't called if the value is null.
To allow this, I wanted to propose that, when a field isn't explicitely marked as required, validators be called even if the value is null.
But then comes another problem, since most validators expect a non-null value and will break on NPE if no value is given.
So what about the following changes:
- when a field isn't marked as required, validators are called even if the value is null,
If a value is not required isn't it always valid on null-values?
- validators that need a value to do their job (e.g. regexp, range, email, etc) will return "true" (valid) for a null value
If the value is null and the field is not required it should be valid without even consulting the validator. Do I miss something?
- other validators (such as assert) will behave according to their semantics with null values.
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