邁克爾·哈特爾教程第8章錯誤

Question

我經歷邁克爾·哈特爾的教程，我不斷收到此錯誤，每當我測試spec/models/user_spec.rb

rails_projects/sample_app/app/controllers/application_controller.rb:3:in `<class:ApplicationController>': uninitialized constant ApplicationController::SessionsHelper (NameError) 

這是我application_controller.rb文件

class ApplicationController < ActionController::Base 
    protect_from_forgery 
    include SessionsHelper 

    # Force signout to prevent CSRF attacks 
    def handle_unverified_request 
    sign_out 
    super 
    end 

end 

這是我spec/models/user_spec.rb文件

# == Schema Information 
# 
# Table name: users 
# 
# id   :integer   not null, primary key 
# name  :string(255) 
# email  :string(255) 
# created_at :datetime   not null 
# updated_at :datetime   not null 
# 

require 'spec_helper' 

describe User do 

    @user = User.new(name: "Example User", email: "user@example.com", password: "foobar", password_confirmation: "foobar") 
end 

subject { @user } 

    it { should respond_to(:name) } 
    it { should respond_to(:email) } 
    it { should respond_to(:password_digest) } 
    it { should respond_to(:password) } 
    it { should respond_to(:password_confirmation) } 
    it { should respond_to(:remember_token) } 
    it { should respond_to(:authenticate) } 

    it { should be_valid } 

describe "when name is not present" do 
    before { @user.name = " " } 
    it { should_not be_valid } 
end 

describe "when email is not present" do 
    before { @user.email = " " } 
    it { should_not be_valid } 
end 

describe "when name is too long" do 
    before { @user.name = "a" * 51 } 
    it { should_not be_valid } 
end 

describe "when email format is invalid" do 
    it "should be invalid" do 
     addresses = %w[user@foo,com user_at_foo.org example.user@foo. 
        foo@bar_baz.com foo@bar+baz.com] 
     addresses.each do |invalid_address| 
     @user.email = invalid_address 
     @user.should_not be_valid 
    end 
end 
describe "when email format is valid" do 
    it "should be valid" do 
     addresses = %w[user@foo.COM A_US-ER@f.b.org frst.lst@foo.jp a+b@baz.cn] 
     addresses.each do |valid_address| 
     @user.email = valid_address 
     @user.should be_valid 
    end 
end 

describe "when email address is already taken" do 
    before do 
     user_with_same_email = @user.dup 
     user_with_same_email.email = @user.email.upcase 
     user_with_same_email.save 
end 
    it { should_not be_valid } 
    end 
end 

describe "when password is not present" do 
    before { @user.password = @user.password_confirmation = " " } 
    it { should_not be_valid } 
    end 
end 

describe "when password doesn't match confirmation" do 
    before { @user.password_confirmation = "mismatch" } 
    it { should_not be_valid } 
end 

describe "when password confirmation is nil" do 
    before { @user.password_confirmation = nil } 
    it { should_not be_valid } 
end 

describe "with a password that's too short" do 
    before { @user.password = @user.password_confirmation = "a" * 5 } 
    it { should be_invalid } 
end 

describe "return value of authenticate method" do 
    before { @user.save } 
    let(:found_user) { User.find_by_email(@user.email) } 

describe "with valid password" do 
     it { should == found_user.authenticate(@user.password) } 
end 

describe "with invalid password" do 
     let(:user_for_invalid_password) { found_user.authenticate("invalid") } 
     it { should_not == user_for_invalid_password } 
     specify { user_for_invalid_password.should be_false } 
    end 
end 

Answer 1

（我還沒有發表任何評論）

由於在主體被調用之前，第一個結束就是結束主要描述塊，所以你會得到「未定義的方法」主題「錯誤。

它應該是這樣的：

describe User do 

    before { @user = whatever } 

    subject { @user } 

    #everything else 

end 

在這本書中，我覺得他用

before do 
    @user = #whatever 
end 

，而不是

before { @user = whatever } 

，但他們做到了同樣的事情。