Question

我对rails上的ruby还是新手，并不完全理解为什么我收到以下错误：

 undefined local variable or method `user' for #<StatisticsController:0xb9a20d0>

代码：

class StatisticsController < ApplicationController
  before_filter :authenticate, :only => [:index]

  def index

    @title = "Statistics"
    @projects = Project.all 
    @data = []


    Project.all.each do |project|
      projdata = { 'name' => project.project_name.to_s,
                  'values' => [] }

      ['Pre-Sales','Project','Fault Fixing','Support' ].each do |taskname|

          record = Effort.sum( :hours,
          :joins => {:project_task => {:efforts => :user}},
          :conditions => { "project_tasks.efforts.user_id" => user.id,                             
              "project_tasks.project_id" => project.id,
           "project_tasks.task_name" => taskname } )

        projdata[ 'values' ].push( record )
      end

      @data.push( projdata )
    end
  end
end

更新

class StatisticsController < ApplicationController
  before_filter :authenticate, :only => [:index]

  def index

    @title = "Statistics"
    @projects = Project.all 
    @data = []


     User.all.each do |user|
      projdata = { 'name' => user.user_id.to_s,
                  'values' => [] }

      ['Pre-Sales','Project','Fault Fixing','Support' ].each do |taskname|
          user = User.all 
          record = Effort.sum( :hours,
          :joins => {:project_task => {:efforts => :user}},
          :conditions => { "project_tasks.efforts.user_id" => user.id,                             
                           "project_tasks.project_id" => project.id,
                           "project_tasks.task_name" => taskname } )

        projdata[ 'values'].push( record )
      end

      @data.push( projdata )
    end
  end
end

Answer 1

在字符串:conditions => { "project_tasks.efforts.user_id" => user.id,中，您为用户对象调用id，但它未在上面的代码中实例化。

Answer 2

您使用的是devise吗？使用current_user代替user。

修复您的代码：

User.all.each do |user|
  projdata = { 'name' => user.user_id.to_s,
              'values' => [] }

  ['Pre-Sales','Project','Fault Fixing','Support' ].each do |taskname|
      record = Effort.sum( :hours,
      :joins => {:project_task => {:efforts => :user}},
      :conditions => { "project_tasks.efforts.user_id" => user.id,                             
                       "project_tasks.project_id" => project.id,
                       "project_tasks.task_name" => taskname } )

    projdata[ 'values'].push( record )
  end

  @data.push( projdata )
end

所以：删除了流氓user=User.all：）

问题：在一个地方你写user.user_id而另一个你写user.id。这是对的吗？

Answer 3

您的更新根本不会遍历用户; user现在是所有用户的集合。如果要为单个用户获取单独的统计信息，则需要对用户进行迭代。

RoR - 未定义的局部变量或方法`user'

3 个答案: