Thanks for your answer,
I've tried but i get an error:
Am Montag, 10. Februar 2020 17:18:38 UTC+1 schrieb Massimo Di Pierro:
>
> You need to 1) extend Validator and 2) provide an options method. This
> should do:
>
>
> from pydal.validators import Validator
>
> class IS_IN_SET_CONDITIONAL(Validator):
> def __init__(self, liste, expression, error_message="Value not
> allowed"):
> self.expression = expression
> self.error_message = error_message
> self.liste = liste
>
> def __call__(self, value):
> if self.expression:
> if value in self.liste:
> return (value,None)
> else:
> return(value, self.error_message)
>
> else:
> return (value, None)
> def options(self):
> return self.liste
>
> On Sunday, 9 February 2020 21:58:25 UTC-8, Fabian wrote:
>>
>> Hello Guys,
>>
>> I made a Validator which should check if the value is in the list, but
>> only if an expression is True.
>> It works fine BUT it produces no dropdown. Hope you can help me:
>>
>> Class:
>>
>> class IS_IN_SET_CONDITIONAL():
>> def __init__(self, liste, expression, error_message="Value not
>> allowed"):
>> self.expression = expression
>> self.error_message = error_message
>> self.liste = liste
>>
>> def __call__(self, value):
>> if self.expression:
>> if value in liste:
>> return (value,None)
>> else:
>> return(value, self.error_message)
>>
>> else:
>> return (value, None)
>>
>>
>> Field:
>>
>> Field("Letter", label="Letter", requires=IS_IN_SET_CONDITIONAL(['A', 'B',
>> 'C'], Expression)),
>>
>>
>>
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