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glenrobertson/data_required_if.py

Created June 15, 2015 21:09
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Conditional DataRequired wtforms validator
Raw
data_required_if.py
class DataRequiredIf(wtforms.validators.DataRequired):
"""
Similar to DataRequired
Only evaluates if func(form.data) evaluates to True
"""
def __init__(self, func, *args, **kwargs):
super(DataRequiredIf, self).__init__(*args, **kwargs)
self.func = func
def __call__(self, form, field):
if self.func(form.data):
super(DataRequiredIf, self).__call__(form, field)
else:
raise wtforms.validators.StopValidation()
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