ActiveRecord和关联排序

Question

我有这样一个简单的AR协会:

Question    has_many :answers

Answer      belongs_to :question

with
  `question_id` int(11) NOT NULL,
  `is_accepted` tinyint(1) DEFAULT NULL,

在答案中.我只有一个is_accpeted答案,我想知道是否有一个容易排序到顶部(只是一个订单)？

谢谢

编辑:这是我的答案课:

class Answer < ActiveRecord::Base
    belongs_to :question 
end 

Answer 1

答案在您的架构中

`is_accepted` tinyint(1)

对于许多数据库,ActiveRecord存储布尔值true和falseas 1和0

所以

question = Question.find(23)
questions.answers.order("is_accepted DESC")

应该做你想做的事.

您也可以将其添加为默认订单.

class Question
  has_many :answers, :order => "is_accepted DESC" # rails 3
  has_many :answers, -> { order "is_accepted DESC" } # rails 4
end

现在question.answers将始终首先以"is_accepted"开头.