How does Django Know the Order to Render Form Fields?

Question

If I have a Django form such as:

class ContactForm(forms.Form):
    subject = forms.CharField(max_length=100)
    message = forms.CharField()
    sender = fo         


        

Answer 1

If either fields = '__all__':

class AuthorForm(ModelForm):
    class Meta:
        model = Author
        fields = '__all__'

or exclude are used:

class PartialAuthorForm(ModelForm):
    class Meta:
        model = Author
        exclude = ['title']

Then Django references the order of fields as defined in the model. This just caught me out, so I thought I'd mention it. It's referenced in the ModelForm docs:

If either of these are used, the order the fields appear in the form will be the order the fields are defined in the model, with ManyToManyField instances appearing last.