limit_choice_to在一個ForeignKey特定模型CLASSE的所有對象

Question

例

class Base(): 
    pass 

class A(Base) 
parent=models.Foreignkey("self", limit_choices_to=(all members of the B class) 

class B(Base) 
parent=models.Foreignkey("self", limit_choices_to=(all members of the A class) 

什麼將是limit_choices_to查詢語法，只得到某一類的 對象？）

Answer 1

豈不這項工作呢？

class Base(Model): 
    parent=models.Foreignkey("self") 

    class Meta: 
     abstract = True 


class A(Base): 
    parent=models.Foreignkey("B") 

class B(Base): 
    parent=models.Foreignkey("A")