Question

我正在开发一个从Steam API读取数据的小型Rails 3应用程序。我所看到的是，我创建的任何ActiveRecord模型的模型属性都没有保存到数据库中，如果我debug它们也不输出。

这是我的样本模型

class NonPlayableApp < ActiveRecord::Base
  attr_accessor :name, :steam_id
  attr_accessible :name, :steam_id
end

迁移文件为：

class CreateNonPlayableApps < ActiveRecord::Migration
  def change
    create_table :non_playable_apps do |t|
      t.string :name
      t.string :steam_id
      t.timestamps
    end
  end
end

以下是使用Rails控制台进行的一些测试，当我在控制器和inspect或yaml模型中尝试时，我得到相同的结果：

irb(main):001:0> temp = NonPlayableApp.new( steam_id: 33333, name: "Testing" )
=> #<NonPlayableApp id: nil, name: nil, steam_id: nil, created_at: nil, updated_at: nil>
irb(main):002:0> temp.steam_id
=> 33333
irb(main):003:0> temp.name
=> "Testing"
irb(main):004:0> temp.save
   (0.1ms)  begin transaction
  SQL (4.0ms)  INSERT INTO "non_playable_apps" ("created_at", "name", "steam_id", "updated_at") VALUES (?, ?, ?, ?)  [["created_at", Fri, 26 Feb 2016 19:40:37 UTC +00:00], ["name", nil], ["steam_id", nil], ["updated_at", Fri, 26 Feb 2016 19:40:37 UTC +00:00]]
   (8.8ms)  commit transaction
=> true
irb(main):005:0> temp.steam_id
=> 33333
irb(main):006:0> temp
=> #<NonPlayableApp id: 64, name: nil, steam_id: nil, created_at: "2016-02-26 19:40:37", updated_at: "2016-02-26 19:40:37">
irb(main):007:0> temp2 = NonPlayableApp.first
  NonPlayableApp Load (1.6ms)  SELECT "non_playable_apps".* FROM "non_playable_apps" LIMIT 1
=> #<NonPlayableApp id: 64, name: nil, steam_id: nil, created_at: "2016-02-26 19:40:37", updated_at: "2016-02-26 19:40:37">
irb(main):008:0> temp2.steam_id
=> nil
irb(main):009:0> temp2.name
=> nil

我错过了什么？

Answer 1

attr_accessor :name, :steam_id会覆盖Rails为这些属性自动生成的setter和getter方法。

只需从模型中删除attr_accessor :name, :steam_id行。

Rails简单模型属性未保存到数据库

1 个答案: