Question

假设我有两个这样的模型：

class Comment < ActiveRecord::Base
  belongs_to :user
  named_scope :about_x :conditions => "comments.text like '%x%')"
end

class User < ActiveRecord::Base
  has_many :comments
end

我想使用模型，以便我可以使用'％x％'等文本返回所有用户和所有评论

all_user_comments_about_x = User.comments.about_x

如何进行？

谢谢

Answer 1

尝试以下

class User < ActiveRecord::Base
  has_many :comments
  named_scope :about_x, :joins => :comments, :conditions => ["comments.text like '%x%'"]
end

然后

@comments = User.about_x

Answer 2

如果我理解正确，你需要

# all comments about x and the user who did it
@comments = Comment.about_x(:include => :user)

或

@user = User.first
# all @user's comments about x
@comments = @user.comments.about_x

Rails 2.3使用另一个模型的named_scope或替代

2 个答案: