IS_IN_SET Conditional produces no Dropdown

[Fabian]

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)),

[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

[Fabian]

Thanks for your answer,

I've tried but i get an error: