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嘿,我想在模型窗體中獲得django自動完成燈的值,並相應地爲下一個字段生成選擇。如何讀取django自動完成燈值以動態生成選擇?

class GroupPropertiesForm(forms.ModelForm): 
    <strike>fields['equipment_grade']: forms.ChoiceField(
      choices=[(o.id, str(o)) 
        for o in GroupProperties.objects.all(group=???group???)]</strike> 
class Meta: 
    model = GroupProperties 
    fields = ('group', 'bells') 
    widgets = { 
     'group': autocomplete.ModelSelect2(
      url='groups-autocomplete') 
     ) 
    } 

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