在多对多字段上启用Django Admin过滤器

Question

我有一个简单的Django模型,类似于:

class Address(models.Model):
    blah

class MemberData(models.Model):
    user = models.ForeignKey(User)
    addresses = models.ManyToManyField(Address)

我想在admin中公开Address模型,以允许用户通过其关联用户过滤地址记录.例如

class AddressAdmin(admin.ModelAdmin):
    model = Address
    list_filter = [???]

ModelAdmin.list_filter属性允许这样做,但我不确定使用哪个字段名来支持我的多对多关系.如果Address模型直接引用MemberData模型,我可以执行以下操作:

class AddressAdmin(admin.ModelAdmin):
    model = Address
    list_filter = ['memberdata__user']

是否存在间接多对多关系的等效语法？如果没有,是否有任何解决方法来完成同样的目的？

Answer 1

我相信这样的情况,你可以through为你的M2M关系制作一个简单的模型,然后使用正常的语法来遵循(现在显式的)ForeignKeys.就像是:

class Address(models.Model):
    blah

class MemberData(models.Model):
    user = models.ForeignKey(User)
    addresses = models.ManyToManyField(Address,through='MemberAddress')

class MemberAddress(models.Model):
    member = models.ForeignKey(MemberData)
    address = models.ForeignKey(Address)

并在管理员:

class AddressAdmin(admin.ModelAdmin):
    model = Address
    list_filter = ['memberaddress_set__member__user']