Question

我有以下表达式：

user.clocks.includes(:users, :runs => :user_runs).find_by_id(params[:id])

似乎工作正常。但是当我添加订单时，就像这样：

user.clocks.includes(:users, :runs => :user_runs).orders("users.names").find_by_id(params[:id])

它因以下错误而中断：

ActiveRecord::ConfigurationError: Association named 'user_runs' was not found; perhaps you misspelled it?
app/controllers/clocks_controller.rb:19:in `show'
    test/functional/clocks_controller_test.rb:21:in `__bind_1286475263_942556'

任何想法为什么？

该模型如下所示：

class Clock < ActiveRecord::Base
  has_and_belongs_to_many :users
  has_many :runs
end

class Run < ActiveRecord::Base
  belongs_to :clock
  has_many :user_runs
  has_many :users, :through => :user_runs
end

class UserRun < ActiveRecord::Base
  belongs_to :run
  belongs_to :user
end

继续我的调查我试过这个：

ubiquitous_user.clocks.includes(:runs => :user_runs).find_by_id(params[:id])

我注意到它生成的查询根本没有得到user_runs。有点奇怪。

我已经创建了一组测试来试图弄清楚发生了什么：

  context "A graph of users, clocks, runs, etc" do
    setup do
      @users = []
      10.times do
        @users << Factory.create(:user)
      end
      @clocks = []
      10.times do
        @clocks << Factory.create(:clock, :users => @users)
      end
      @clocks.each do |clock|
        10.times do
          run = Factory.create :run, :clock => clock
          @users.each do |user|
            Factory.create :user_run, :run => run, :user => user
          end
        end
      end
      @user = @users.first
      @clock = @clocks.first
    end

    should "find a clock" do
      assert_not_nil @user.clocks.find(@clock.id)
    end

    should "find a clock with users" do
      assert_not_nil @user.clocks.includes(:users).find(@clock.id)
    end

    should "find a clock with users and runs" do
      assert_not_nil @user.clocks.includes(:users, :runs).find(@clock.id)
    end

    should "find a clock with users, runs and user_runs" do
      assert_not_nil @user.clocks.includes(:users, :runs => :user_runs).find(@clock.id)
    end

    should "find a clock with users order by users.name" do
      assert_not_nil @user.clocks.includes(:users).order("users.name").find(@clock.id)
    end

    should "find a clock with users and runs order by users.name" do
      assert_not_nil @user.clocks.includes(:users, :runs).order("users.name").find(@clock.id)
    end

    should "find a clock with users, runs and user_runs order by users.name" do
      assert_not_nil @user.clocks.includes(:users, :runs => :user_runs).order("users.name").find(@clock.id)
    end
  end

每次测试，但最后一次测试通过。这不是一个错误吗？

Answer 1

不应该是

user.clocks.find_by_id(params[:id], :include => [:users, {:runs => :user_runs}])

Answer 2

我相信这是一个错误，所以我在此报告：https://rails.lighthouseapp.com/projects/8994-ruby-on-rails/tickets/5768

无法通过Rails3上的包含订购

2 个答案: