Check with `regex.match()` evaluated before "required attribute missing"

[excalq]

Check with `regex.match()` evaluated before "required attribute missing"

[Peefy]

You can write the following code for the optional attribute using the if filter, and I will change the optional attribute check time in some PR.

check:
     regex.match(description, ...) if description, 'The error message'

[excalq]

Another aspect to this is being unsure if it's possible to do validation on optional fields (if set). I assumed I could do:

check:
    description == None or regex.match(description, ...), 'The error message'

But this produces the same error reported above. My workaround is having the field be non-optional, and setting a default description value in the schema.

[excalq]

Well that makes a lot of sense, thinking Pythonically! Thanks a ton.