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我有两个模型Hotel，Theme并且我已经has_and_belongs_to_many对其应用了关联。

我的迁移是

class CreateHotelsThemesTable < ActiveRecord::Migration
  def up
    create_table :hotels_themes, :id => false do |t|
        t.references :hotel
        t.references :theme
    end
    add_index :hotels_themes, [:hotel_id, :theme_id]
    add_index :hotels_themes, :hotel_id
  end

  def down
    drop_table :hotels_theme
  end
end

型号是：

class Theme < ActiveRecord::Base
  attr_accessible :theme_names
  has_and_belongs_to_many :hotels
end



class Hotel < ActiveRecord::Base
  attr_accessible :hotel_name, :stars, :location
  validates :hotel_name, :stars, :location, :presence => true
  has_and_belongs_to_many :thumes
end

其中一些记录是：

theme
=> #<Theme id: 5, theme_names: "Friends", created_at: "2013-08-24 20:13:00", updated_at: "2013-08-24 20:13:00">

    hotel
=> #<Hotel id: 2, hotel_name: "vijay shree1", stars: "2", location: "South Goa", created_at: "2013-08-24 15:59:53", updated_at: "2013-08-24 15:59:53">

当我跑

>> theme.hotels
=> [#<Hotel id: 2, hotel_name: "vijay shree1", stars: "2", location: "South Goa", created_at: "2013-08-24 15:59:53", updated_at: "2013-08-24 15:59:53">]

工作，但是当我跑步时

>> hotel.themes
!! #<NoMethodError: undefined method `themes' for #<Hotel:0x007f6cd007c080>>

我不明白为什么会发生这种情况，我使用了 has_and_belongs_to_many 关联。提前感谢您对我的帮助。

4

1 回答 1

4

好像有错别字：has_and_belongs_to_many :thumes。

我认为这是您的问题的原因

于 2013-08-24T21:38:13.407 回答