ruby-on-rails - 如何在删除:destroy in Rails?中传递ID

Question

非常简单，但我不知道如何通过测试。

我有一个要测试的 friendships Controller (我正在构建类似于 this railscast 的 Rails 应用程序)。它适用于本地主机。这是我创建的测试。 POST #create 已通过。

require 'rails_helper'

RSpec.describe FriendshipsController, type: :controller do
  login_user

  before :each do
    @friend1 = FactoryGirl.create(:user)
  end

  describe "POST #Create" do
    it "adds new friend" do
      expect {
        post :create, params: { friend_id: @friend1.id}
      }.to change(Friendship, :count).by(1)
    end
  end

  describe "DELETE #destroy" do
    it "removes a friend =(" do
      expect {
        delete :destroy, id: @friend1.id
      }.to change(Friendship, :count).by(1)
    end
  end

end

这是实际控制人:

class FriendshipsController < ApplicationController
  def create
    @friendship = current_user.friendships.build(friend_id: params[:friend_id])
    if @friendship.save
      flash[:notice] = "New friend added!"
      redirect_to root_url
    else
      flash[:error] = "Error adding friend"
      redirect_to root_url
    end
  end

  def destroy
    @friendship = current_user.friendships.find(params[:id])
    @friendship.destroy
    flash[:notice] = "Remove friendship"
    redirect_to current_user
  end
end

我还确保 routes.rb 有友谊:resources :friendships

我遇到的问题是传递 ID。我不知道如何传递 id 参数。我认为这与我的工厂有关...？

  1) FriendshipsController DELETE #destroy removes a friend =(
     Failure/Error: @friendship = current_user.friendships.find(params[:id])

     ActiveRecord::RecordNotFound:
       Couldn't find Friendship with 'id'=159 [WHERE "friendships"."user_id" = $1]

我搜索其他 SO destroy 相关的帖子，比如 this one , this , 但它们与我的情况不同。

如何为销毁操作传递 ID 参数？

编辑:(Source)

module ControllerMacros
  def login_user
    before(:each) do
      @request.env["devise.mapping"] = Devise.mappings[:user]
      user = FactoryGirl.create(:user)
      #user.confirm! # or set a confirmed_at inside the factory. Only necessary if you are using the "confirmable" module
      sign_in user
    end
  end
end

正如下面的答案所建议的，我做了:

describe "DELETE #destroy" do
    it "removes a friend =(" do
      friendship = user.friendships.create!(friend_id: @friend1.id)
      expect {
        delete :destroy, id: friendship.id
      }.to change(Friendship, :count).by(1)
    end
  end

但它现在返回这个错误:

FriendshipsController DELETE #destroy removes a friend =(
     Failure/Error: friendship = user.friendships.create!(friend_id: @friend1.id)

     NameError:
       undefined local variable or method `user' for #<RSpec::ExampleGroups::FriendshipsController::DELETEDestroy:0x007fee1ce68c70>

Answer 1

由于您要寻找的是友谊，而不是 Controller 中的用户，因此您需要先建立友谊。在此之前，您还需要知道要登录的用户。尝试先发送:

module ControllerMacros
  def login_user(user)
    before(:each) do
      @request.env["devise.mapping"] = Devise.mappings[:user]
      user ||= FactoryGirl.create(:user)
      sign_in user
    end
  end
end

现在测试看起来像这样:

let(:current_user) { FactoryGirl.create(:user) }
login_user(current_user)

describe "DELETE #destroy" do
  it "removes a friend =(" do
    friendship = current_user.friendships.create!(friend_id: @friend1.id)
    expect {
      delete :destroy, id: friendship.id
    }.to change(Friendship, :count).by(1)
  end
end

你现在应该可以走了。