Ruby on rails 3 Rails 3-通过rspec对PUT方法进行正确测试

我有一个modelTeacherLeader，它为其他表保留外键。我可以更新这个表，并尝试为我的控制器编写测试（通过rspec）

我的模型：

#  id         :integer         not null, primary key
#  user_id    :integer
#  teacher_id :integer
#

class TeacherLeader < ActiveRecord::Base  
  belongs_to :user
  belongs_to :teacher

  validates :teacher_id, 
              :uniqueness => { :message => "already a class-head" }
end

当我尝试运行我的规格时，我得到：

1) TeacherLeadersController PUT 'update for signed-in school-heads should update teacher leader with correct params
     Failure/Error: put :update, :id => @teacher_leader, :teacher_id => @teacher.id
     NoMethodError:
       undefined method `[]' for nil:NilClass
     # ./app/controllers/teacher_leaders_controller.rb:57:in `update'
     # ./spec/controllers/teacher_leaders_controller_spec.rb:150:in `block (4 levels) in <top (required)>'

1）TeacherLeadersController PUT“已登录校长的更新应使用正确的参数更新教师领导
失败/错误：put:update，：id=>@teacher\u leader，：teacher\u id=>@teacher.id
命名错误：
nil:NilClass的未定义方法“[]”
#./app/controllers/teacher\u leaders\u controller.rb:57:in'update'
#./spec/controllers/teacher\u leaders\u controller\u spec.rb:150:in‘block（4级）in’

---

但我的应用程序工作！我在测试中做错了什么？

您的控制器需要一个

参数[:teacher\u leader]

散列，但您的测试没有提供它。试试这个：

it "should update teacher leader with correct params" do
  put :update, :id => @teacher_leader, :teacher_leader => { :teacher_id => @teacher.id }
  # ...

---

确保您的规格包装有

descripe teacher leaders controller

块。例如：

describe TeacherLeadersController do
  describe "PUT 'update" do
    #...

    describe "for signed-in school-heads" do
      it "should update teacher leader with correct params" do
        put :update, :id => @teacher_leader, :teacher_id => @teacher.id
      end
    end
  end
end

…然后您应该能够正确使用

put

方法

此外，您忘了将

：teacher\u leader

属性传递给测试下的控制器。尝试

put:update，：id=>something，：teacher\u leader=>{some\u attributes\u here}

---

无论如何，我强烈建议您模拟控制器规范中的所有数据库查询（活动记录调用）。为了测试参数是否持久化，您应该使用请求规范（或其他进行集成/验收测试的方法）。请参阅示例：

可能是

put:update，：id=>@teacher\u leader.id，…

？

it "should update teacher leader with correct params" do
  put :update, :id => @teacher_leader, :teacher_leader => { :teacher_id => @teacher.id }
  # ...

describe TeacherLeadersController do
  describe "PUT 'update" do
    #...

    describe "for signed-in school-heads" do
      it "should update teacher leader with correct params" do
        put :update, :id => @teacher_leader, :teacher_id => @teacher.id
      end
    end
  end
end