Question

I have an ‘inlineformset_factory’, and I’m trying figure out how to set attributes for the individual fields. I haven’t come up with any way to add them besides using javascript (which would be hacky and bad).

In the end I’d like something like:

<input id="id_authorbook_set-0-title" type="text" name="authorbook_set-0-title" maxlength="255" placeholder="Title" autofocus="autofocus">

I know adding custom attributes is possible when using normal Forms or even ModelForms with attrs={'foo': 'bar', 'placeholder': 'Username'}, but haven’t been able to find any way to do the same with formset factories.

Is there a solution?
Thanks for the help.

Answer 1

What you describe as working, the attrs argument, is passed to a form widget, which means you need form fields and thus a form.

inlineformset_factory is a formset_factory for ModelForms.

Tying the two together, you need to define a custom ModelForm and pass that to the factory as the form argument.

You could also define a custom formset which iterates through the active forms, does the same overrides, and pass that to the inlineformset_factory.

class MyMF(forms.ModelForm):
    class Meta:
        model = Foo

    def __init__(self, *args, **kwargs):
        super(MyMF, self).__init__(*args, **kwargs)
        self.fields['foo'].widget.attrs = {'foo': 'bar'}

inlineformset_factory(form=MyMF)