[Fixed]-Django: How to change a field widget in a Inline Formset

As of Django 1.6, you can use the widgets parameter of modelformset_factory in order to customize the widget of a particular field:

AuthorFormSet = modelformset_factory(Author, widgets={
    'name': Textarea(attrs={'cols': 80, 'rows': 20})
})

and therefore the same parameter for inlineformset_factory (which uses modelformset_factory):

AuthorInlineFormSet = inlineformset_factory(Author, Book, fields=['name'], widgets={
    'name': Textarea(attrs={'cols': 80, 'rows': 20})
})

This is an example of customizing one field using formfield_callback:

def formfield_callback(field):
    if isinstance(field, models.ChoiceField) and field.name == 'target_field_name':
        return fields.ChoiceField(choices = SAMPLE_CHOICES_LIST, label='Sample Label')
    return field.formfield()

FormSet = inlineformset_factory(ModelA, ModelB, extra=1, formfield_callback = formfield_callback)

You need to define a form and update widget in the Meta class. Look at Overriding the default field types or widgets

you can subclass the formset and override the add_fields method. This worked for me and I am using Django 1.5 🙁 .

AuthorInlineFormSet = inlineformset_factory(Author, Book)
class AuthorFormSet(AuthorInlineFormSet):
        def add_fields(self, form, index):
            super(ReferenceForm,self).add_fields(form,index)
            form.fields["name"] = forms.CharField(widget=forms.TextInput())

I know this is a really old thread. Now we can do this using django ModelForm itself.

Add your model form in forms.py with widgets.

forms.py

class QAForm(forms.ModelForm):
    class Meta:
        model = QA
        fields = ['question', 'answer', 'status']
        widgets = {
            'question': widgets.Textarea(
                attrs={
                    'class': 'form-control',
                    'rows': 3,
                    'cols': 40
                }
            ),
            'answer': widgets.Textarea(
                attrs={
                    'class': 'form-control',
                    'rows': 3,
                    'cols': 40
                }
            ),
            'status': widgets.Select(
                attrs={
                    'class': 'form-select'
                }
            )
        }

pass it using from parameter for your modelformset_factory like following in your views.py

views.py

QAFormSet = modelformset_factory(
                                 models.QA,
                                 fields=["question", "answer", "status"],
                                 form=QAForm
                                )