Django - combining multiple models into the same form class

Question

Is there a way of combining multiple models in the same form class in the form.py file.

Right now I have three Models, and have to create three separate form classes in the form.py file using forms.Modelform for each form class.

I define the model for each form class in the Meta tag,

Something like:

class Form1(forms.ModelForm):

    # FORM META PARAMETERS
    class Meta:
        model = Model 1

class Form2(forms.ModelForm):

    # FORM META PARAMETERS
    class Meta:
        model = Model 2

class Form3(forms.ModelForm):

    # FORM META PARAMETERS
    class Meta:
        model = Model 3

Then I have to combine all three forms (a selection of fields from each Model), in the HTML template, so there is only one submit button.

Then I have to make sure I save each of the 3 forms, in the view.py file, so that things get saved from hitting one submit button

Question

Is there not a way of combining models into one form class to begin with in the form.py file?

It would make the coding upstream in the view, and html template a lot easier, more compact and less repititious! Only 1 form class name to handle!

Also all the error checks would be in one place, and I would be managing fewer form classes that will have different names elsewhere, in other *.py or *.html files, since fields from multiple models would be combined into just one form class, with one name.

Answer 1

I had a coworker as me this question this morning. At the moment, I don't think it's possible but someone with a broader knowledge base than my own might be able to show us how. I think you're probably going to have to inherit from a default forms.Form model to do what you want to do.