Rails將活動記錄結果拆分為數組/哈希

Question

可以說我有一個Activerecord結果，例如：

order.order_numbers

它返回一個ActiveRecord_Associations_CollectionProxy

=> [#<OrderNumber id: 53425, Order_number: "01100", Order_number_id: 5391, Order_number_status_id: 1, comment: nil, updated_at: "2016-11-18 16:20:36">,
 #<OrderNumber id: 53426, Order_number: "04503", Order_number_id: 5391, Order_number_status_id: 1, comment: nil,  updated_at: "2016-11-18 16:19:49">,
 #<OrderNumber id: 53427, Order_number: "011004", Order_number_id: 5391, Order_number_status_id: 2, comment: nil, updated_at: "2016-11-18 16:19:49">,
 #<OrderNumber id: 53428, Order_number: "004505", Order_number_id: 5391, Order_number_status_id: 1, comment: nil, updated_at: "2016-11-18 16:19:49">,
 #<OrderNumber id: 53429, Order_number: "4506", Order_number_id: 5391, Order_number_status_id: 2, comment: nil,  updated_at: "2016-11-18 16:19:49">,
 #<OrderNumber id: 53430, Order_number: "4507", Order_number_id: 5391, Order_number_status_id: 1, comment: nil, updated_at: "2016-11-18 16:19:49">]

注意Order_number_status_id ，其中1表示打開 ，2表示關閉 。

如果我想根據“ 已關閉 ”狀態將其拆分並將結果輸出到單獨的數組中，怎么辦？ 我只想將未結訂單放入他們自己的數組中，但是每當它從一個關閉的數字變為一個打開的數字時，就開始一個新的數組。

在上面的示例中，結果將是

• Array_1將包含ID 53425和53426

• Array_2將包含id53428

• Array_3將包含ID 53430

因此，它將把它分成3個不同的散列或數組，這些散列或數組僅包含未結訂單編號，所有這些均位於單個數組中。

[[#<OrderNumber id: 53425, Order_number: "01100", Order_number_id: 5391, Order_number_status_id: 1, comment: nil, updated_at: "2016-11-18 16:20:36">,
 #<OrderNumber id: 53426, Order_number: "04503", Order_number_id: 5391, Order_number_status_id: 1, comment: nil,  updated_at: "2016-11-18 16:19:49">,], [<OrderNumber id: 53428, Order_number: "004505", Order_number_id: 5391, Order_number_status_id: 1, comment: nil, updated_at: "2016-11-18 16:19:49">], [<OrderNumber id: 53430, Order_number: "4507", Order_number_id: 5391, Order_number_status_id: 1, comment: nil, updated_at: "2016-11-18 16:19:49">]]

我願意接受有關輸出格式的建議。

Answer 1

為什么不只是.split？ 數組＃拆分

order.order_numbers.split{|o| o.Order_number_status_id == 0}

Answer 2

您可以使用group_by

最適合你的情況

Answer 3

看看標准方法Enumerable＃chunk 。

您可以執行以下操作：

order.order_numbers.chunk { |o_num| o_num.Order_number_status_id == 1 }.each{|a, b| p b}

將結果保存在新數組中以刪除不必要的片段。