python - Django在管理员中过滤多对多字段？

Question

我有三个对象:

Thing
  some fields

Bucket
  things = models.ManyToManyField(Thing)

User
  buckets = models.ManyToManyField(Bucket)
  things = models.ManyToManyField(Thing)

在管理员中编辑我的“存储桶”字段时，我希望能够选择事物，但只能选择当前登录用户的“事物”列表中的那些事物。

我该怎么做？换句话说，如何过滤 Bucket admin 中的 Things 列表？

非常感谢您提前提供的帮助。

Answer 1

有一个formfield_for_manytomany .用法和defuz给出的答案类似。

ModelAdmin.formfield_for_manytomany(db_field, request, **kwargs)¶

Like the formfield_for_foreignkey method, the formfield_for_manytomany method can be overridden to change the default formfield for a many to many field. For example, if an owner can own multiple cars and cars can belong to multiple owners – a many to many relationship – you could filter the Car foreign key field to only display the cars owned by the User:

class MyModelAdmin(admin.ModelAdmin):
    def formfield_for_manytomany(self, db_field, request, **kwargs):
        if db_field.name == "cars":
            kwargs["queryset"] = Car.objects.filter(owner=request.user)
        return super(MyModelAdmin, self).formfield_for_manytomany(db_field, request, **kwargs)