ruby-on-rails - Hartl第10章未定义的局部变量或方法'object'

Question

如清单 10.33所示，我制作了用于创建微帖子的部分表单，<%= render 'shared/error_messages', object: f.object %>并按照说明更新了相应的视图文件。但是，我无法通过 Rspec 测试，因为我不断收到“类的未定义局部变量或方法'对象'......”有什么想法吗？

app/views/shared/_micropost_form.html.erb

<%= form_for(@micropost) do |f| %>
  <%= render 'shared/error_messages', object: f.object %>
  <div class="field">
    <%= f.text_area :content, placeholder: "Compose new micropost..." %>
  </div>
  <%= f.submit "Post", class: "btn btn-large btn-primary" %>
<% end %>

app/views/shared/_error_messages.html.erb

<% if object.errors.any? %>
  <div id="error_explanation">
    <div class="alert alert-error">
      The form contains <%= pluralize(object.errors.count, "error") %>.
    </div>
    <ul>
      <% object.errors.full_messages.each do |msg| %>
        <li>* <%= msg %></li>
      <% end %>
    </ul>
  </div>
<% end %>

应用程序/视图/用户/new.html.erb

<% provide(:title, 'Sign up') %>
<h1>Sign up</h1>

<div class="row">
  <div class="span6 offset3">
    <%= form_for(@user) do |f| %>
      <%= render 'shared/error_messages', object: f.object %>
      <%= render 'fields', f: f %>
      <%= f.submit "Create my account", class: "btn btn-large btn-primary" %>
    <% end %>
  </div>
</div>

应用程序/视图/用户/edit.html.erb

<% provide(:title, "Edit user") %> 
<h1>Update your profile</h1>

<div class="row">
  <div class="span6 offset3">
    <%= form_for(@user) do |f| %>
      <%= render 'shared/error_messages', object: f.object %>
      <%= render 'fields', f: f %>
      <%= f.submit "Save changes", class: "btn btn-large btn-primary" %>
    <% end %>

    <%= gravatar_for @user %>
    <a href="http://gravatar.com/emails" target="_blank">change</a>
  </div>
</div>

认证规范

require 'spec_helper'

describe "Authentication" do

  subject { page }

  describe "signin page" do
    before { visit signin_path }

    it { should have_selector('h1',    text: 'Sign in') }
    it { should have_selector('title', text: 'Sign in') }
  end

  describe "signin" do
    before { visit signin_path }

    describe "with invalid information" do
      before { click_button "Sign in" }

      it { should have_selector('title', text: 'Sign in') }
      it { should have_error_message('Invalid') }

      it { should_not have_link('Users',    href: users_path) }
      it { should_not have_link('Sign out', href: signout_path) }

      describe "after visiting another page" do
        before { click_link "Home" }
        it { should_not have_selector('div.alert.alert-error') }
      end      
    end

    describe "with valid information" do
      let(:user) { FactoryGirl.create(:user) }
      before { sign_in user }

      it { should have_selector('title', text: user.name) }

      it { should have_link('Users',    href: users_path) }
      it { should have_link('Profile', href: user_path(user)) }
      it { should have_link('Settings', href: edit_user_path(user)) }
      it { should have_link('Sign out', href: signout_path) }

      it { should_not have_link('Sign in', href: signin_path) }

      describe "followed by signout" do
        before { click_link "Sign out" }
        it { should have_link('Sign in') }
      end      
    end    
  end  

  describe "authorization" do

    describe "for non-signed-in users" do
      let(:user) { FactoryGirl.create(:user) }

      describe "in the Users controller" do

      it { should_not have_link('Profile', href: user_path(user)) }
      it { should_not have_link('Settings', href: edit_user_path(user)) }

        describe "visiting the edit page" do
          before { visit edit_user_path(user) }
          it { should have_selector('title', text: 'Sign in') }
        end

        describe "submitting to the update action" do
          before { put user_path(user) }
          specify { response.should redirect_to(signin_path) }
        end

        describe "visiting the user index" do
          before { visit users_path }
          it { should have_selector('title', text: 'Sign in') }
        end 
      end

      describe "when attempting to visit a protected page" do
        before do
          visit edit_user_path(user)
          fill_in "Email",    with: user.email
          fill_in "Password", with: user.password
          click_button "Sign in"
        end

        describe "after signing in" do

          it "should render the desired protected page" do
            page.should have_selector('title', text: 'Edit user')
          end

      describe "when signing in again" do
        before do
          visit signin_path
          fill_in "Email", with: user.email
              fill_in "Password", with: user.password
          click_button "Sign in"
            end

        it "should render the default (profile) page" do
          page.should have_selector('title', text: user.name)
        end
          end
        end

      describe "in the Microposts controller" do

        describe "submitting to the create action" do
          before { post microposts_path }
          specify { response.should redirect_to(signin_path) }
        end

        describe "submitting to the destroy action" do
          before { delete micropost_path(FactoryGirl.create(:micropost)) }
          specify { response.should redirect_to(signin_path) }
        end
      end   
    end
  end

    describe "as wrong user" do
      let(:user) { FactoryGirl.create(:user) }
      let(:wrong_user) { FactoryGirl.create(:user, email: "wrong@example.com") }
      before { sign_in user }

      describe "visiting Users#edit page" do
        before { visit edit_user_path(wrong_user) }
        it { should_not have_selector('title', text: full_title('Edit user')) }
      end

      describe "submitting a PUT request to the Users#update action" do
        before { put user_path(wrong_user) }
        specify { response.should redirect_to(root_path) }
      end
    end  

    describe "as non-admin user" do
      let(:user) { FactoryGirl.create(:user) }
      let(:non_admin) { FactoryGirl.create(:user) }

      before { sign_in non_admin }

      describe "submitting a DELETE request to the Users#destroy action" do
        before { delete user_path(user) }
        specify { response.should redirect_to(root_path) }        
      end
    end
  end  
end

用户规范

require 'spec_helper'

describe "User pages" do

  subject { page }

  describe "index" do

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

    before(:all) { 30.times { FactoryGirl.create(:user) } }
    after(:all)  { User.delete_all }

    before(:each) do
      sign_in user
      visit users_path
    end    

    it { should have_selector('title', text: 'All users') }
    it { should have_selector('h1',    text: 'All users') }    

    describe "pagination" do

      it { should have_selector('div.pagination') }

      it "should list each user" do
        User.paginate(page: 1).each do |user|
          page.should have_selector('li', text: user.name)
        end
      end
    end

    describe "delete links" do

      it { should_not have_link('delete') }

      describe "as an admin user" do
        let(:admin) { FactoryGirl.create(:admin) }
        before do
          sign_in admin
          visit users_path
        end

        it { should have_link('delete', href: user_path(User.first)) }
        it "should be able to delete another user" do
          expect { click_link('delete') }.to change(User, :count).by(-1)
        end
        it { should_not have_link('delete', href: user_path(admin)) }
      end
    end     
  end

  describe "signup page" do
    before { visit signup_path }

    it { should have_selector('h1',    text: 'Sign up') }
    it { should have_selector('title', text: 'Sign up') }
  end

  describe "profile page" do
    let(:user) { FactoryGirl.create(:user) }
    let!(:m1) { FactoryGirl.create(:micropost, user: user, content: "Foo") }
    let!(:m2) { FactoryGirl.create(:micropost, user: user, content: "Bar") }   

    before { visit user_path(user) }

    it { should have_selector('h1',    text: user.name) }
    it { should have_selector('title', text: user.name) }
  end  

  describe "microposts" do
      it { should have_content(m1.content) }
      it { should have_content(m2.content) }
      it { should have_content(user.microposts.count) }
    end

  describe "signup" do

    before { visit signup_path }

    let(:submit) { "Create my account" }

    describe "with invalid information" do
      it "should not create a user" do
        expect { click_button submit }.not_to change(User, :count)
      end

      describe "after submission" do
        before { click_button submit }

        it { should have_selector('title', text: 'Sign up') }
        it { should have_content('error') }
      end      
    end

    describe "with valid information" do
      before { valid_signup }

      it "should create a user" do
        expect { click_button submit }.to change(User, :count).by(1)
      end

      describe "after saving the user" do
        before { click_button submit }
        let(:user) { User.find_by_email('user@example.com') }

        it { should have_selector('title', text: user.name) }
        it { should have_success_message('Welcome') }
    it { should have_link('Sign out') }
      end
    end
  end  

  describe "edit" do
    let(:user) { FactoryGirl.create(:user) }
    before do
      sign_in user
      visit edit_user_path(user)
    end

    describe "page" do
      it { should have_selector('h1',    text: "Update your profile") }
      it { should have_selector('title', text: "Edit user") }
      it { should have_link('change', href: 'http://gravatar.com/emails') }
    end

    describe "with invalid information" do
      before { click_button "Save changes" }

      it { should have_content('error') }
    end

    describe "with valid information" do
      let(:new_name)  { "New Name" }
      let(:new_email) { "new@example.com" }
      before do
        fill_in "Name",             with: new_name
        fill_in "Email",            with: new_email
        fill_in "Password",         with: user.password
        fill_in "Confirm Password", with: user.password
        click_button "Save changes"
      end

      it { should have_selector('title', text: new_name) }
      it { should have_success_message }
      it { should have_link('Sign out', href: signout_path) }
      specify { user.reload.name.should  == new_name }
      specify { user.reload.email.should == new_email }
    end    
  end  
end

score 14 · Accepted Answer

哇，现在我觉得自己像个傻瓜......我<%= render 'shared/error_messages' %>在用户字段中留下了一个额外的部分

希望这会帮助遇到同样问题的其他人。

score 8 · Accepted Answer

本教程的当前版本（截至 2013 年 8 月）有一个警告：

（注意：如果您在 9.6 节的练习中实现了清单 9.50 和清单 9.51，您的代码会有所不同...）

...但就像其他人问这些问题一样，我一开始就错过了。同样，如果您在第 9.6 节中进行了练习，请不要编辑您当前的 new.html.erb 和 edit.html.erb 文件。您需要更新的唯一文件<%= render 'shared/error_messages', object: f.object %>是 _fields.html.erb。

score 1 · Accepted Answer

他应该更新教程以提醒我们删除额外的 <%= render 'shared/error_messages' %> 在用户字段部分如上面所说的那样。这是之前的要求遗留下来的。我有同样的问题。不要以为你是个白痴，很少有人会记得这一点。

score 0 · Accepted Answer

对于仍在寻找的任何人，如果您正在遵循 Hartl 教程，请检查该<%= render 'shared/error_messages'...行。app/views/users/_name_email_password_form.html.erb

score 0 · Accepted Answer

这是正确的代码

 <% if error_messages.errors.any? %>
  <div id="error_explanation">
    <div class="alert alert-danger">
      The form contains <%= pluralize(error_messages.errors.count,     "error") %>.
    </div>
    <ul>
    <% error_messages.errors.full_messages.each do |msg| %>
      <li><%= msg %></li>
    <% end %>
    </ul>
  </div>
<% end %>

这是这样做的正确形式

ruby-on-rails - Hartl第10章未定义的局部变量或方法'object'

5 回答 5

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