Question

I have a form that is a subclass of BaseInlineFormSet, and for one of the fields in the related model, I like to change its widget. Here is my code for the form:

class MyForm(forms.models.BaseInlineFormSet):
    def __init__(self, *args, **kwargs):
        super(MyForm, self).__init__(*args, **kwargs)

        self.forms[0].error_css_class = 'error'
        self.forms[0].required_css_class = 'required'

    class Meta:
        model = MyModel

        # here I am trying.
        # recommend is an IntegerField in MyModel, which -
        # I like to make it render in the form as a Radio Select (yes, no)
        widgets = {'recommend': {forms.RadioSelect}}

Any help and input is appreciated

Answer 1

An inline formset is a collection of model forms. The Meta class doesn’t belong on the formset, it belongs on a model form.

Usually, you would create the inline formset class using the inlineformset_factory method, which can take form as an argument.

class MyModelForm(forms.ModelForm):
    class Meta:
        model = MyModel
        widgets = {'recommend': forms.RadioSelect()}

MyModelFormSet = inlineformset_factory(ParentModel, MyModel, form=MyModelForm)

If you do have to subclass BaseInlineFormset, you can provide formset as an argument to inlineformset_factory as well.

Have a look at the inline formset documentation for more information.