Django 从另一端使用 ManyToMany 而不是 ForeignKey

Question

In a specific Django app, I have a DB Model class A that is considered as the main class and many other models are connected to it weather through one to one relationship (like B ) or one to many relationship (like C ). 因此，实现此类的直接方法是：

class A(Model):
    b = OneToOneField('B', on_delete=CASCADE)
    # other fields

class B(Model):
    # some fields

class C(Model):
    a = ForeignKey(A, on_delete=CASCADE)
    # other fields

现在，当我想创建一个新的 object 的A时，顺序将是：

• 创建B object
• 创建A object 并将创建的B object 链接到它
• 创建C object 并将创建A object 链接到它。

这种情况在更大范围内发生，许多模型与 model A相关联。 But I want to have all the relations seen in the A class so that when I want to create an object of A , I go to create all the related objects first after validating them regardless the relationship, then create new A object and link all those与之相关的对象。 所以，我这样做了：

class A(Model):
    b = OneToOneField('B', on_delete=CASCADE)
    c = ManyToManyField('C')                      # as there is no OneToManyField

class B(Model):
    # some fields

class C(Model):
    # some fields

但是这个解决方案似乎不太好，因为C应该只有一个A object。

这样做是否可以接受，或者是否有另一种好的做法？

Answer 1

OneToMany 等于 ForeignKey 构造函数。

class A(Model):
    b = OneToOneField('B', on_delete=CASCADE)
    c = Foreignkey('C', on_delete=CASCADE)

class B(Model):
    # some fields

class C(Model):
    # some fields

对我来说似乎完全没有问题。