Question

嗨我有很多关联，其中'帖子'有很多'感觉'，我想知道如何找到具有用户特定感觉的所有帖子。我的感觉模型有一个'名字'属性。

class User < ActiveRecord::Base
  has_many :posts, :dependent => :destroy
  devise :database_authenticatable, :registerable,
         :recoverable, :rememberable, :trackable, :validatable
end

class Post < ActiveRecord::Base
  has_many :feelingships
  has_many :feelings, :through => :feelingships
  belongs_to :user
end

class Feeling < ActiveRecord::Base
  has_many :feelingships
  has_many :posts, :through => :feelingships
end


class Feelingship < ActiveRecord::Base
  belongs_to :post
  belongs_to :feeling
  attr_accessible :post_id, :feeling_id
end

我尝试了这个，但它说我有错误的关联：“ActiveRecord :: ConfigurationError：没有找到名为'感觉'的关联;也许你拼错了它？”

 def feeling
  @user = User.find(params[:id])
  @feed_items= @user.posts.includes(:feeling).where(
          ['`feelings`.name = ?', params[:feeling]])
  @feed_items = @feed_items.paginate(:per_page => "10", :page => params[:page])
render 'shared/_feed', :layout => 'head_layout'
end

Answer 1

includes参数应为:feelings - 注意复数，即你的关联名称。

所以它应该是：

@user.posts.includes(:feelings)

Rails 3：在has_many关联上调用数据库

1 个答案: