In Django, how to populate a generic relation from a single form field?
在我们的应用程序中，我们有一个
在填充非通用ForeignKey字段时，可以使用ModelChoiceField。我们的问题是我们找不到一个多元素的schoicefield，它的选择将由
如何通过尽可能多地重用现有的django代码来解决这个问题？
你可以这样做：
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 | class YourForm(forms.ModelForm): your_field = forms.ChoiceField() def __init__(self, *args, **kwargs): super(YourForm, self).__init__(*args, **kwargs) your_generic_relations_objects = list(FirtsModel.object.all()) + list(SecondModel.objects.all()) # and etc object_choices = [] for obj in your_generic_relations_objects: type_id = ContentType.objects.get_for_model(obj.__class__).id obj_id = obj.id form_value = 'type:%s-id:%s' % (type_id, obj_id) display_text = str(obj) object_choices.append([form_value, display_text]) self.fields['your_field'] = forms.ChoiceField(choices=object_choices) class Meta: model = YourModel fields = [ 'your_field' # and others ] def save(self, *args, **kwargs): object_string = self.cleaned_data['your_field'] matches = re.match("type:(\d+)-id:(\d+)", object_string).groups() content_type_id = matches[0] object_id = matches[1] content_type = ContentType.objects.get(id=content_type_id) self.instance.object_id = object_id self.instance.content_type = content_type return super(YourForm, self).save() |