When form is submitted via JSON and data is set using field.process(None, data), Optional always stops the validation chain, because it checks only field.raw_data which will always be None.
Fix for issue #842 .
Optional validator should check field.data to validate fields correctly.
When form is submitted via JSON and data is set using
field.process(None, data),Optionalalways stops the validation chain, because it checks onlyfield.raw_datawhich will always beNone.Fix for issue #842 .
Optionalvalidator should checkfield.datato validate fields correctly.