Question

我的AnswersController中有一个destroy方法，它在删除可跟踪对象时也会销毁public_activity记录。

答案控制器活动删除：

 def destroy
    @answer = Answer.find(params[:id])
    if @answer.destroy 
       @activity = PublicActivity::Activity.where(trackable_id: @answer.id, trackable_type: "Answer", owner_id: @answer.user.id).first
       @activity.destroy
       respond_to do |format|
          format.js
       end
    end
 end

我的answers_spec.rb测试失败了：

Answers deletes an answer
 Failure/Error: click_link "delete-answer"
 NoMethodError:
   undefined method 'destroy' for nil:NilClass
 # ./app/controllers/answers_controller.rb:41:in `destroy'
 # (eval):2:in 'click_link'
 # ./spec/requests/answers_spec.rb:20:in `block (3 levels) in <top (required)>'
 # ./spec/requests/answers_spec.rb:19:in `block (2 levels) in <top (required)>'

我认为这是因为您在@activity中可以看到的AnswersController实例变量尚未设置，并且没有公共活动记录可以尝试删除。

有没有办法用答案凭据创建@activity实例变量以便可以删除它或者一种方法来删除destroy方法以便不删除public_activity记录？

answers_spec.rb

//omitted for brevity//

it "deletes an answer" do
    visit root_path
    sign_in_user
    create_and_find_question
    create_answer
    page.should have_selector("div", id: "delete-answer")
    expect {
      click_link "delete-answer"
    }.to change(Answer, :count).by(-1)
  end

answer_helper.rb

module AnswerHelper
  def create_and_find_question
    visit questions_path
    click_link "Ask a Question"
    page.should have_content "Step 1: Upload a Video"
    click_link "Step 2"
    page.should have_content "Step 2: Ask your question"
    fill_in "Title", with: "Ball starting too far left"
    fill_in "Body", with: "my clubface is closed..."
    expect {
      click_button "Save"
    }.to change(Question, :count).by(1) 
    page.should have_content "Question Created"
    page.should have_content "Add your answer"
  end

  def create_answer
    click_link "Add your answer"
    page.should have_selector("div", id: "new_answer")
    fill_in "answer_body", with: "You need to shift your weight better"
    expect {
      click_button "Save Answer"
    }.to change(Answer, :count).by(1) 
    page.should have_content "You need to shift your weight better"
  end
 end

更新

根据Peter在下面的评论，使用rails inbuilt依赖destroy来处理删除相关记录是有意义的。我刚刚尝试将其添加到答案模型中：

has_many：活动，如:: trackable，dependent :: destroy

然而它出错了： NameError - uninitialized constant Answer::Activity:

PublicActivity表称为活动。我应该为这个has_many协会使用什么名字？

Answer 1

虽然我认为你仍然应该尝试找出你的显式删除有什么问题，因为它可能表明代码中的其他地方存在问题，我将在这里回答你关于使用{{1 }}

我认为你得到了has_many，因为关联类的默认名称（即来自单词NameError的非限定Activity）不正确。关联的类是activities。您可以使用PublicActivity::Activity参数指定它，如http://guides.rubyonrails.org/association_basics.html#options-for-has-many中所述。请注意，您指定了关联的类，并让Rails推断出关联的表名;您没有直接指定表名。

stub out：destroy删除请求规范中的public_activity记录

1 个答案: