PublicActivity：獲取用戶的所有不同活動

我正在使用公共活動gem來跟蹤用戶的評論。我想在查詢中獲取所有唯一的用戶註釋。我試圖做以下幾點：PublicActivity：獲取用戶的所有不同活動

PublicActivity::Activity.where(:trackable_type=>"Comment").where(:owner_id => user.id).all.select(:trackable_id).distinct

但我得到的錯誤：

ArgumentError: wrong number of arguments(1 for 0) 
    from (irb):14:in `select' 
    from (irb):14 
    from /Users/ttseng/.rvm/gems/ruby-1.9.3-p448/gems/railties-3.2.15/lib/rails/commands/console.rb:47:in `start' 
    from /Users/ttseng/.rvm/gems/ruby-1.9.3-p448/gems/railties-3.2.15/lib/rails/commands/console.rb:8:in `start' 
    from /Users/ttseng/.rvm/gems/ruby-1.9.3-p448/gems/railties-3.2.15/lib/rails/commands.rb:41:in `<top (required)>' 
    from script/rails:6:in `require' 
    from script/rails:6:in `<main>'

有誰知道如何提取的基礎上trackable_id用戶的獨特的活動？

以供參考，這是我的查詢結果看起來像之前我嘗試獲取獨特的記錄：

enter image description here

來源

2014-09-05 scientiffic

我沒on Rails的控制檯下面，看看我得到了什麼

2.0.0p353 :020 > PublicActivity::Activity.where(id:1).class 
=> ActiveRecord::Relation::ActiveRecord_Relation_PublicActivity_Activity 
2.0.0p353 :021 > PublicActivity::Activity.all.class 
=> ActiveRecord::Relation::ActiveRecord_Relation_PublicActivity_Activity 
2.0.0p353 :022 > PublicActivity::Activity.where(id:1).all.class 
DEPRECATION WARNING: Relation#all is deprecated. If you want to eager-load a relation, you can call #load (e.g. `Post.where(published: true).load`). If you want to get an array of records from a relation, you can call #to_a (e.g. `Post.where(published: true).to_a`). (called from irb_binding at (irb):22) 
W, [2014-09-06T01:47:09.341145 #8594] WARN -- : DEPRECATION WARNING: Relation#all is deprecated. If you want to eager-load a relation, you can call #load (e.g. `Post.where(published: true).load`). If you want to get an array of records from a relation, you can call #to_a (e.g. `Post.where(published: true).to_a`). (called from irb_binding at (irb):22) 
    PublicActivity::Activity Load (0.6ms) SELECT "activities".* FROM "activities" WHERE "activities"."id" = 1 
D, [2014-09-06T01:47:09.343063 #8594] DEBUG -- : PublicActivity::Activity Load (0.6ms) SELECT "activities".* FROM "activities" WHERE "activities"."id" = 1 
=> Array 
2.0.0p353 :023 >

正如你所見，你正在執行select操作array，這就是爲什麼你得到這樣的錯誤[R ArgumentError: wrong number of arguments(1 for 0)

嘗試此相反，

PublicActivity::Activity.where(:trackable_type=>"Comment").where(:owner_id => user.id).select(:trackable_id).distinct

來源

2014-09-05 20:22:02

感謝您的回覆。當我運行沒有「全部」的查詢時，我得到一個不同的錯誤：Hirb錯誤：缺少屬性：查看 /app/config/initializers/public_activity.rb:34:in'初始化' – scientiffic 2014-09-05 20:43:26

事實證明這是一個問題HIRB，這是一個不同的問題。當我刪除自定義初始化代碼時，它可以工作。謝謝！ – scientiffic 2014-09-05 20:46:44

實際上，這會返回一個trackable_id數組，而不是實際的公共活動記錄。是否有可能返回記錄？ – scientiffic 2014-09-05 20:59:12

答案是運行以下命令：

PublicActivity :: Activity.where（：trackable_type => 「註釋」），其中（：owner_id = > user.id）.select（「DISTINCT ON（trackable_id）*」）

來源

2014-09-05 21:17:45 scientiffic

PublicActivity：獲取用戶的所有不同活動

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