ruby-on-rails - 使用嵌套资源和关联的 FactoryGirl 对象的 Controller 的 RSpec 测试失败

Question

我正在构建一个项目来学习 Rails 和测试，并努力解决引导嵌套资源的 Controller 的 RSpec 测试中的错误。我的代码在浏览器中按预期工作。我相信问题与我的测试设置和 FactoryGirl 对象的关联有关。我需要故障排除和修复 Controller 规范方面的帮助。

这是 cardio_exercises_controller.rb

class CardioExercisesController < ApplicationController

# :get_member is defined in the private method at the bottom of this file,
# and takes the member_id provided by the routing and
#converts it to a @member object.

before_action :get_member    

# GET member/1/cardio_exercises
# GET member/1/cardio_exercises.json
def index
@cardio_exercises = @member.cardio_exercises
end

# GET member/1/cardio_exercises/1
# GET member/1/cardio_exercises/1.json
def show
 cardio_exercise = @member.cardio_exercises.find(params[:id])
end

# GET member/1/cardio_exercises/new
def new
@member = Member.find(params[:member_id])
@cardio_exercise = @member.cardio_exercises.build
end

# GET member/1/cardio_exercises/1/edit
def edit
@cardio_exercise = @member.cardio_exercises.find(params[:id])
end

# POST member/1/cardio_exercises
# POST member/1/cardio_exercises.json
def create
@cardio_exercise = @member.cardio_exercises.build(cardio_exercise_params)

if @cardio_exercise.save
flash[:success] = "Cardio exercise was successfully created."
redirect_to member_cardio_exercises_path(@member)
else
render 'new'
end
end  

# PATCH/PUT member/1/cardio_exercises/1
# PATCH/PUT member/1/cardio_exercises/1.json
def update
@cardio_exercise = @member.cardio_exercises.find(params[:id])
if @cardio_exercise.update(cardio_exercise_params)
flash[:success] = "Cardio exercise was successfully updated."
redirect_to member_cardio_exercises_path(@member)
else
 render 'edit'
end
end

# DELETE member/1/cardio_exercises/1
# DELETE member/1/cardio_exercises/1.json
def destroy
@cardio_exercise = @member.cardio_exercises.find(params[:id])
@cardio_exercise.destroy
respond_to do |format|
  format.html { redirect_to (member_cardio_exercises_path(@member)), notice: 'Cardio exercise was    successfully destroyed.' }
format.json { head :no_content }
end
end


private
# The get_member action converts the member_id given by the routing
# into an @member object, for use here and in the view.

def get_member
@member = Member.find(params[:member_id])
end


def cardio_exercise_params
params.require(:cardio_exercise).permit(:title, :duration, :calories_burned, :date, :member_id)
end
end

这是 cardio_exercises_controller_spec.rb

require 'rails_helper'

RSpec.describe CardioExercisesController, :type => :controller do
before :each do
  @member = FactoryGirl.create(:member)
  @cardio_exercise = FactoryGirl.create(:cardio_exercise)      
  @cardio_exercise_attributes = FactoryGirl.attributes_for(:cardio_exercise, :member_id => @member)
end

describe "GET index" do
it "assigns all cardio_exercises as @member.cardio_exercises" do     
  get :index, { :member_id => @member  }
  expect(assigns(:cardio_exercises)).to eq(@member.cardio_exercises)
end
end

describe "GET show" do
it "assigns the requested cardio_exercise as @member.cardio_exercise" do
  get :show, { :member_id => @member, :id => @cardio_exercise }    
  expect(assigns(:cardio_exercise)).to eq(@member.cardio_exercise)  
end
end 

describe "GET new" do
it "assigns a new cardio_exercise as @member.cardio_exercise" do
  get :new, { :member_id => @member }
  expect(assigns(:cardio_exercise)).to be_a_new(CardioExercise)
end
end

describe "GET edit" do
it "assigns the requested cardio_exercise as @member.cardio_exercise" do      

end
end

describe "POST create" do
describe "with valid params" do
  it "creates a new CardioExercise" do        
    expect {          
      post :create, { :member_id => @member, :cardio_exercise => @cardio_exercise_attributes }
    }.to change(CardioExercise, :count).by(1)         
  end

  it "assigns a newly created cardio_exercise as @cardio_exercise" do
    post :create, { :member_id => @member, :cardio_exercise => @cardio_exercise_attributes }        
    expect(assigns(:cardio_exercise)).to be_a(CardioExercise)
    expect(assigns(:cardio_exercise)).to be_persisted
  end

  it "redirects to the created cardio_exercise" do
    post :create, { :member_id => @member, :cardio_exercise => @cardio_exercise_attributes }
    expect(response).to redirect_to(CardioExercise.last)
  end  
  end
  end

  describe "PUT update" do
  describe "with invalid params" do

  xit "updates the requested cardio_exercise" do
    #put :update, { id: @member.id, member_id: cardio_exercise: @cardio_exercise.id }
  end

  xit "assigns the requested cardio_exercise as @member.cardio_exercise" do

  end

  xit "redirects to the cardio_exercise" do

  end
  end

  describe "with invalid params" do
  xit "assigns the cardio_exercise as @member.cardio_exercise" do

  end

  xit "re-renders the 'edit' template" do

    expect(response).to render_template("edit")
  end
  end
  end

  describe "DELETE destroy" do
  it "destroys the requested cardio_exercise" do
  expect {
    delete :destroy, { :member_id => @member, :id => @cardio_exercise }
  }.to change(CardioExercise, :count).by(-1)
  end

  it "redirects to the cardio_exercises list" do      
  delete :destroy, { :member_id => @member, :id => @cardio_exercise }
  expect(response).to redirect_to(member_cardio_exercises_url)
  end
  end
  end

这些是相关的工厂:

FactoryGirl.define do
  factory :cardio_exercise do
    title "My cardio exercise"
    duration 30
    calories_burned 300
    date "2014-11-15"       
    association :member     
  end
end


FactoryGirl.define do
factory :member do
    first_name {Faker::Name.first_name}
    last_name {Faker::Name.last_name}
    age 21
    height 75
    weight 195
    goal "fffff" * 5
    start_date "2014-11-15"     
  end
end

routes.rb 包含: 资源:成员做 资源:cardio_exercises 结束

members.rb 包含: has_many :cardio_exercises, :dependent => :destroy

cardio_exercises.rb 包含: 属于:成员

Rspec 失败/错误:

1) CardioExercisesController GET show assigns the requested cardio_exercise as @member.cardio_exercise
 Failure/Error: get :show, { :member_id => @member, :id => @cardio_exercise }
 ActiveRecord::RecordNotFound:
   Couldn't find CardioExercise with 'id'=25 [WHERE "cardio_exercises"."member_id" = $1]

2) CardioExercisesController POST create with valid params redirects to the created cardio_exercise
 Failure/Error: expect(response).to redirect_to(CardioExercise.last)
 NoMethodError:
   undefined method `cardio_exercise_url' for #<CardioExercisesController:0x00000008bba960>

3) CardioExercisesController DELETE destroy destroys the requested cardio_exercise
 Failure/Error: delete :destroy, { :member_id => @member, :id => @cardio_exercise }
 ActiveRecord::RecordNotFound:
   Couldn't find CardioExercise with 'id'=34 [WHERE "cardio_exercises"."member_id" = $1]

4) CardioExercisesController DELETE destroy redirects to the cardio_exercises list
 Failure/Error: delete :destroy, { :member_id => @member, :id => @cardio_exercise }
 ActiveRecord::RecordNotFound:
   Couldn't find CardioExercise with 'id'=35 [WHERE "cardio_exercises"."member_id" = $1]

我认为“未找到记录”错误表明成员(member)和有氧运动模型之间的关联存在问题。 Controller 未通过其 ID 找到有氧运动。在为 RSpec 进行设置时我错过了什么？修复设置的最佳方法是什么？

未定义的方法错误似乎是由我在 CardioExercise 上调用最后一个方法引起的。我发布到示例中的创建方法。 CardioExercise 是类(class)。有人可以解释为什么该调用会触发错误，以及如何修复它吗？

感谢您的帮助!

Answer 1

您创建了两个独立的对象/记录:member 和 cardio_exercise。您应该将 @member 传递给工厂 cardio_exercise 以连接它们。

@member = FactoryGirl.create(:member)
@cardio_exercise = FactoryGirl.create(:cardio_exercise, member: @member)  

PS 当你在没有设置的情况下创建cardio_exercise 时，member 工厂会在表 members 中创建新记录并使用此新记录分配 cardio_exercise

更新

关于“获取索引”

您创建 @member 时没有任何关联的 cardio_exercises。您稍后添加了它们，对象 @member 对此一无所知。您应该重新加载对象以从数据库中获取数据

expect(assigns(:cardio_exercises)).to eq(@member.reload.cardio_exercises)

有时我会将关系转换为数组并对结果进行排序以避免顺序不同时测试失败