django: how to access current request user in ModelForm?

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If you’re using Class Based Views (CBVs) then passing an extra argument in the form constructor (e.g. in get_forms_class) or in form_class will not work, as <form> object is not callable will be shown.

The solution for CBVs is to use get_form_kwargs(), e.g.:

views.py:

class MyUpdateView(UpdateView):

    model = MyModel
    form_class = MyForm

    # Sending user object to the form, to verify which fields to display/remove (depending on group)
    def get_form_kwargs(self):
        kwargs = super(MyUpdateView, self).get_form_kwargs()
        kwargs.update({'user': self.request.user})
        return kwargs

forms.py:

class MyForm(forms.ModelForm):

    def __init__(self, *args, **kwargs):
        self.user = kwargs.pop('user')  # To get request.user. Do not use kwargs.pop('user', None) due to potential security hole

        super(MyForm, self).__init__(*args, **kwargs)

        # If the user does not belong to a certain group, remove the field
        if not self.user.groups.filter(name__iexact="mygroup").exists():
            del self.fields['confidential']

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