Rails宝典之第四式: 将查询移位Model

沿着Rails宝典之第三式: 通过关联做查询的脚步，我们可以进一步简化代码:

class Task < ActiveRecord::Base
  belongs_to :project

  def self.find_incomplete
    find_all_by_complete(false, : order => 'created_at DESC')
  end
end

class ProjectsController < ApplicationController
  def show
    @project = Project.find(param[:id])
    @tasks = @project.tasks.find_incomplete
  end
end

class TasksController < ApplicationController
  def index
    @tasks = Task.find_incomplete
  end
end