Question

我与Has_many和Subscriber

使用Sub models关系

class Sub < ActiveRecord::Base

  belongs_to :Subscriber
end

class Subscriber < ActiveRecord::Base
  has_many :subs

end

将记录插入Sub表格时播放

我收到以下错误如下

错误记录

Rails Console.
 a=Subscriber.find(1)
  Subscriber Load (0.0ms)  SELECT  "subscribers".* FROM "subscribers" WHERE "subscribers"."id" = ? LIMIT 1  [["id", 1]]
=> #<Subscriber id: 1, name: "arun", created_at: "2015-12-22 07:38:34", updated_at: "2015-12-22 07:38:34">
irb(main):002:0> a.subs
  Sub Load (0.0ms)  SELECT "subs".* FROM "subs" WHERE "subs"."subscriber_id" = ?  [[nil, 1]]
ActiveRecord::StatementInvalid: SQLite3::SQLException: no such column: subs.subscriber_id: SELECT "subs".* FROM "subs" WHERE "subs"."subscriber_id" = ?

Answer 1

使用

class Sub < ActiveRecord::Base
    belongs_to :subscriber
end

class Subscriber < ActiveRecord::Base 
    has_many :subs
end

使确定您已运行迁移。请勿在关联中使用 CAPITAL 。

你也可以分享你的架构吗？

PS：请缩进你的代码。

Answer 2

使用此belongs_to :subscriber

如果不起作用

将subscriber_id列添加到潜艇

或

键入以下rails命令

rails g migration AddSubscriber_idToSub subscriber_id:integer

然后

rake db:migrate

Rails Active Records SQLite3 :: SQLException：没有这样的列：subs.subscriber_id：SELECT“subs”。* FROM“subs”WHERE“subs”。“subscriber_id”=？

2 个答案: