Django Admin：在ModelForm的構造函數中獲取請求

Question

下面的代碼從下拉菜單中刪除某些值。 它工作正常，但我想要刪除值，如果用戶缺乏某些權限。 如何訪問ModelForm的構造函數中的request.user？還是有更好的方法來完成我想要做的事情？

class AnnouncementModelForm(forms.ModelForm): 

    def __init__(self, *args, **kwargs): 
     super(AnnouncementModelForm, self).__init__(*args, **kwargs) 
     self.fields["category"].queryset = AnnouncementCategory.objects.filter(can_post=True) 

Answer 1

確定這裏是我如何解決它：

def formfield_for_foreignkey(self, db_field, request, **kwargs): 
    if db_field.name == "category" and not request.user.has_perm('can_post_to_all'): 
     kwargs["queryset"] = AnnouncementCategory.objects.filter(can_post=True) 
     return db_field.formfield(**kwargs) 
    return super(AnnouncementAdmin, self).formfield_for_foreignkey(db_field, request, **kwargs) 

Answer 2

How can I access request.user in the ModelForm's constructor?

表單中的構造函數中使用它，只是將請求傳遞給它。

class AnnouncementModelForm(forms.ModelForm): 

    def __init__(self, request, *args, **kwargs): 
     super(AnnouncementModelForm, self).__init__(*args, **kwargs) 
     qs = request.user.foreignkeytable__set.all() 
     self.fields["category"].queryset = qs