Django forms request.user

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I think you can achieve this by overriding the __init__() method of the form, passing in an instance of User and filtering the queryset using that user. Something like this:

class TrophiesForm(ModelForm):
    used_his = forms.ModelMultipleChoiceField(queryset=Gun.objects.filter(user__id=1))

    def __init__(self, user, *args, **kwargs):
        super(TrophiesForm, self).__init__(*args, **kwargs)
        self.fields['used_his'].queryset = User.objects.filter(pk = user.id)

In your view you can pass in the appropriate (currently logged in) instance of User. 

def my_trophies(request, *args, **kwargs):
    user = request.user
    form = TrophiesForm(user)
    ...

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