Rails洗劫和自我加入關聯查詢

Question

鑒於這些關聯...

class User < ActiveRecord::Base
  has_many :orders

  has_many :followers, through: :follower_follows, source: :follower
  # follower_follows "names" the Follow join table for acessing through the follower association
  has_many :follower_follows, foreign_key: :followee_id, class_name: "Follow"

  has_many :followees, through: :followee_follows, source: :followee
  # followee_follows "names" the Follow join table for accessiing through the followee association
  has_many :followee_follows, foreign_key: :follower_id, class_name: "Follow"  
end

class Order < ActiveRecord::Base
  belongs_to :user
end

...和控制器...

class OrdersController < ApplicationController
  def index
    @q = Order.ransack(params[:q])
    @orders = @q.result.includes(:user, :followers)
    # I'am not sure if the includes method is corrects
  end
end

...在我看來...

<%= search_form_for @q do |f| %>
  <%= f.label :user_id_eq %>
  <%= f.search_field :user_id_eq %>

  <%= f.submit "search" %>
<% end %>

我有這種情況：

ID = 1的用戶=>管理員角色

ID = 2的用戶=> user_id = 1的關注者

ID = 3的用戶=> user_id = 1的關注者

# select * from follows;
 id | follower_id | followee_id |         created_at         |         updated_at         
----+-------------+-------------+----------------------------+----------------------------
  1 |           2 |           1 | 2017-12-09 22:30:03.299006 | 2017-12-09 22:30:03.299006
  2 |           3 |           1 | 2017-12-09 22:30:03.304564 | 2017-12-09 22:30:03.304564

問題是：

如何設置要通過f.search_field：user_id_eq（或其他任何東西）查找的點菜，以獲取user_id = 1擁有的所有訂單商品加上user_id = 2並擁有user_id = 3的所有訂單商品？

非常感謝您的支持。

Answer 1

Order.ransack(user_id_eq_any: [1,2,3]).result

f.search_field :user_id_eq_any

Rails + Ransack-下拉列表集合？

如果要輸入作為選擇，請參考上面的答案，添加“ multiple”屬性以允許選擇多個

Answer 2

在您回答之后，我嘗試了：

Order.ransack(user_followees_id_eq: 17).result

看來這就像我想要的那樣。