两级深归属与关联的活动管理员过滤器 [英] Active Admin filter on two-level deep belongs_to association

问题描述

说一个人有很多 House 和 House 有很多门。 （因此，门有一个 house_id ，而众议院有一个 person_id 领域）。我在Active Admin中有一个门列表，其中需要一个过滤器，该过滤器允许我选择一个人，并向我显示该人所有房屋中的所有门。

Say a Person has many House and House has many Door. (So Door has a house_id and House has a person_id field). I have a list of Doors in Active Admin, in which I want a filter that allows me to choose a person, and show me all doors in all of that person's houses.

ActiveAdmin.register Door do
  filter :knob_color
  filter :is_open
  filter :has_window

  filter :house_person      # DOESN'T WORK
  filter :house_person_name # DOESN'T WORK

Person 模型表具有一个 name 字段，因此ActiveAdmin应该能够选择该字段

The Person model table has a name field, so ActiveAdmin should be able to pick that up.

我该怎么做？

根据要求，我的情况在模型中更改。

As requested, my situation rephrased in models.

# id:   integer
# name: string
class Person < ActiveRecord::Base
  has_many :houses
end

# id:        integer
# person_id: integer
class House < ActiveRecord::Base
  belongs_to :person
  has_many   :doors
end

# id:         integer
# house_id:   integer
# knob_color: string
# is_open:    boolean
# has_window: boolean
class Door < ActiveRecord::Base
  belongs_to :house
end

推荐答案

您需要使用 has_one <在门上注册人关联/ code>关系通过 house ，然后您可以直接添加过滤器。

You need to register a person association on Door using a has_one relation through house, and then you can add the filter directly.

class Door < ActiveRecord::Base
  belongs_to :house
  has_one :person, through: :house
end

ActiveAdmin.register Door do
  filter :person
end

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