Ruby on Rails的教程第9课

Question

更新星期六2011年4月23日

课是实现后user.rb以下绿色

def authenticate_with_salt(id, cookie_salt) 
    user = find_by_id(id) 
    (user && user.salt == cookie_salt) ? user : nil 
end 

我得到：

Failures: 

    1) SessionsController POST 'create' success should sign the user in 
    Failure/Error: controller.current_user.should == @user 
    ArgumentError: 
     wrong number of arguments (1 for 2) 
    # ./app/models/user.rb:45:in `authenticate_with_salt' 
    # ./app/helpers/sessions_helper.rb:36:in `user_from_remember_token' 
    # ./app/helpers/sessions_helper.rb:14:in `current_user' 
    # ./spec/controllers/sessions_controller_spec.rb:58:in `block (4 levels) in <top (required)>' 

Finished in 0.54296 seconds 
7 examples, 1 failure 

我继续调查......哦，欢乐！ ：d

编辑：在完成第9课，然后将回到这里后工作 - 似乎，我回来到路径上找到自己的问题再次感谢GrahamJRoy！

更新星期五2011年4月22日：

我花了最后一天试图找到类似的问题，但一直没有引起人们不成功的，如果您需要任何更多信息，请让我知道，无论是失败极有可能彼此相关的，如果我解决一个我认为这将解决其他

Failures: 

    1) SessionsController POST 'create' success should sign the user in 
    Failure/Error: post :create, :session => @attr 
    NameError: 
     undefined local variable or method `clear_return_to' for #<SessionsController:0x00000101648ac8> 
    # ./app/helpers/sessions_helper.rb:28:in `redirect_back_or' 
    # ./app/controllers/sessions_controller.rb:16:in `create' 
    # ./spec/controllers/sessions_controller_spec.rb:51:in `block (4 levels) in <top (required)>' 

    2) SessionsController POST 'create' success should redirect to the user show page 
    Failure/Error: post :create, :session => @attr 
    NameError: 
     undefined local variable or method `clear_return_to' for #<SessionsController:0x00000100ea0690> 
    # ./app/helpers/sessions_helper.rb:28:in `redirect_back_or' 
    # ./app/controllers/sessions_controller.rb:16:in `create' 
    # ./spec/controllers/sessions_controller_spec.rb:57:in `block (4 levels) in <top (required)>' 

Finished in 0.42858 seconds 
7 examples, 2 failures 

在会议helper.rb文件：

def redirect_back_or(default) 
    redirect_to(session[:return_to] || default) 
    clear_return_to 
    end 

在sessions_contro ller_spec.rb文件：

it "should sign the user in" do 
    post :create, :session => @attr 
    controller.current_user.should == @user 
    controller.should be_signed_in 
    end 

    it "should redirect to the user show page" do 
    post :create, :session => @attr 
    response.should redirect_to(user_path(@user)) 
    end 


In sessions_controller.rb file: 

    def create 
    user = User.authenticate(params[:session][:email], 
          params[:session][:password]) 
    if user.nil? 
     flash.now[:error] = "Invalid email/password combination." 
     @title = "Sign in" 
     render 'new' 
    else 
     sign_in user 
     redirect_back_or user 
    end 
    end 

原题如下：

---

我目前在第9课工作的Ruby on Rails的教程和运行自动测试时，我收到以下错误：

失败：

1) SessionsController POST 'create' success should sign the user in 
    Failure/Error: post :create, :session => @attr 
    NoMethodError: 
     undefined method `sign_in' for #<SessionsController:0x000001017082d8> 
    # ./app/controllers/sessions_controller.rb:15:in `create' 
    # ./spec/controllers/sessions_controller_spec.rb:51:in `block (4 levels) in <top (required)>' 

    2) SessionsController POST 'create' success should redirect to the user show page 
    Failure/Error: post :create, :session => @attr 
    NoMethodError: 
     undefined method `sign_in' for #<SessionsController:0x00000100ecbca0> 
    # ./app/controllers/sessions_controller.rb:15:in `create' 
    # ./spec/controllers/sessions_controller_spec.rb:57:in `block (4 levels) in <top (required)>' 

sessions_controller_spec.rb：

it "should sign the user in" do 
    post :create, :session => @attr 
    controller.current_user.should == @user 
    controller.should be_signed_in 
    end 

    it "should redirect to the user show page" do 
    post :create, :session => @attr 
    response.should redirect_to(user_path(@user)) 
    end 

如果我注释掉上述sessions_controller_spec.rb我会变绿！可能这会帮助某人指引我正确的方向，因为我很无聊！

sessions_controller.rb：

def create 
    user = User.authenticate(params[:session][:email], 
          params[:session][:password]) 
    if user.nil? 
     flash.now[:error] = "Invalid email/password combination." 
     @title = "Sign in" 
     render 'new' 
    else 
     sign_in user 
     redirect_back_or user 
    end 
    end 

sessions_helper.rb：

def sign_in(user) 
    cookies.permanent.signed[:remember_token] = [user.id, user.salt] 
    self.current_user = user 
end 

每GrahamJRoy增加了 '包括SessionsHelper' 在application_controller.rb

class ApplicationController < ActionController::Base 
    protect_from_forgery 
    include SessionsHelper 
end 

2个新的错误，我认为导致我的问题：

次

失败：

1) SessionsController POST 'create' success should sign the user in 
    Failure/Error: post :create, :session => @attr 
    NoMethodError: 
     undefined method `redirect_back_or' for #<SessionsController:0x0000010405adc0> 
    # ./app/controllers/sessions_controller.rb:16:in `create' 
    # ./spec/controllers/sessions_controller_spec.rb:51:in `block (4 levels) in <top (required)>' 

    2) SessionsController POST 'create' success should redirect to the user show page 
    Failure/Error: post :create, :session => @attr 
    NoMethodError: 
     undefined method `redirect_back_or' for #<SessionsController:0x000001030a3c60> 
    # ./app/controllers/sessions_controller.rb:16:in `create' 
    # ./spec/controllers/sessions_controller_spec.rb:57:in `block (4 levels) in <top (required)>' 

Answer 1

每文档，有你在ApplicationController中引用的SessionsHelper？

class ApplicationController < ActionController::Base 
    protect_from_forgery 
    include SessionsHelper 
end 

Answer 2

所以我基本上是退步，开始教训一遍，仔细注释掉每个页面，不应该是那里的代码。

我上周六的更新让我开始检查什么是失败显示，所以我去了它提到的每一行，并检查RailsTutorial git回购看到任何明显的差异。

这导致*旁边remember_token

User.authenticate_with_salt(*remember_token) 

当并称*从

Failures: 

    1) SessionsController POST 'create' success should sign the user in 
    Failure/Error: controller.current_user.should == @user 
    ArgumentError: 
     wrong number of arguments (1 for 2) 
    # ./app/models/user.rb:45:in `authenticate_with_salt' 
    # ./app/helpers/sessions_helper.rb:36:in `user_from_remember_token' 
    # ./app/helpers/sessions_helper.rb:14:in `current_user' 
    # ./spec/controllers/sessions_controller_spec.rb:58:in `block (4 levels) in <top (required)>' 

Finished in 0.54296 seconds 
7 examples, 1 failure 

改为错误：

Failures: 

    1) SessionsController POST 'create' success should sign the user in 
    Failure/Error: controller.should be_signed_in 
    NoMethodError: 
     undefined method `signed_in?' for #<SessionsController:0x00000104086088> 
    # ./spec/controllers/sessions_controller_spec.rb:59:in `block (4 levels) in <top (required)>' 

Finished in 1.73 seconds 
63 examples, 1 failure 

在这一点上，我检查了我代码：

def signed_in 
    !current_user.nil? 
    end 

到GIT repoos：

def signed_in? 
    !current_user.nil? 
    end 

，方便地看到一个 '？'错过了，我想我会添加，看看会发生什么..

而且显然我现在绿色...现在让我们完成这一课！

非常感谢GrahamJRoy的输入！