在Django的选择小部件中可以选择request.user

Question

I have a model field

is_anonymous = BooleanField(default=False)

I also have a ModelForm . I want this field to be represented with a select widget.

It would be

class MyModelForm(forms.ModelForm):
    class Meta:
        model = MyModel
        fields = ['is_anonymous']
        widgets = {
            'is_anonymous': forms.NullBooleanSelect(),
        }

It works. But I want the select widget to only have two choices true (1) and false (0) and the represented text in each option should be Anonymous for true and self.request.user for false .

I think I have to do this replacement in the views as self.request.user is not available in the ModelForm .

How can I do this?

Answer 1

It's not 100% clear what you want, but if you want to display a select dropdown with only two choices; "Anonymous" which maps to True and "myusername" (ie the username of the current user) which maps to False, you need to override the is_anonymous field's widget's choices attribute:

class MyModelForm(forms.ModelForm):
    def __init__(self, user, *args, **kwargs):
        super(MyModelForm, self).__init__(*args, **kwargs)
        self.fields['is_anonymous'].widget = forms.Select(choices=[
            (True, "Anonymous"),
            (False, user.username)
        ])

    class Meta:
        model = MyModel
        fields = ['is_anonymous']

because we need the user object in our form, we need to pass it manually as a parameter when defining the form in our view. This depends on the type of view you are using, but assuming it's a generic class based CreateView , you need the following:

class MyCreateView(CreateView):
    form_class = MyModelForm
    ...

    def get_form(self, form_class):
        return self.form_class(self.request.user, **self.get_form_kwargs())

    ...