How to remove a field from the parent Form in a subclass?

Question

class LoginForm(forms.Form):
    nickname = forms.CharField(max_length=100)
    username = forms.CharField(max_length=100)
    password = forms.CharField(widget=form         


        

Answer 1

I didn't like the fact (or so I understood) that the exclusion of a field in the second class using "class Meta:" still results in the unused field being in the db.

Perhaps the simplest way is to define an abstract class that has the fields shared by both classes. Then the two original classes above become subclasses of this new class. So the example given at the start of this thread might look the following. It's a bit more code, but this way you extend a subclass rather than do an (incomplete) exclusion from a super class.

class LoginForm_Common(forms.Form):
    username = forms.CharField(max_length=100)
    password = forms.CharField(widget=forms.PasswordInput)
    class Meta:
        abstract = True

class LoginForm(LoginForm_Common):
    nickname = forms.CharField(max_length=100)

class LoginFormWithoutNickname(LoginForm_Common):
    pass