Re: How do I get dynamic choices to a select widget at render time?

On 20/02/2018 11:16 AM, Mike Dewhirst wrote:
> Here is an example of get_choices() output ... it comes from a method
> on the Question model.
>
>  [('A', 'A - Once?'), ('B', 'B - Twice?'), ('C', 'C - Four times?'),
> ('D', 'D - Twelve times?'), ('E', 'E - Continously as changes are
> made?')]
>
> It is available before the the answer form is instantiated ...
>
> class AnswerSingleForm(forms.ModelForm):
>
>     class Meta:
>         model = Answer
>         fields = [
>             'answer',
>             'score'
>         ]
>

This is my new form which seems to work ...

class AnswerSingleForm(forms.ModelForm):

    def __init__(self, *args, **kwargs):

        super(AnswerSingleForm, self).__init__(*args, **kwargs)

        answer = kwargs['instance']

        choices = answer.question.get_choices()

        if len(choices) > 0:

            self.fields['answer'] = forms.ChoiceField(

                choices=choices

            )

    class Meta:

        model = Answer

        fields = [

            'answer',

            'score'

        ]









> So how do I get that set of choices into the Answer form?
>
> I can see from the docs that the form Meta class can have a widgets
> attribute for the 'answer' field. I think I need a ChoiceField widget
> so I can include the choices. I tried using __init__() in the form
> class to get the choices on board at instantiation but still couldn't
> get it going because class Meta doesn't see 'self'.
>
> Thanks for any help
>
> Stumped
>

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