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我正在使用rails创建我的第一个单独项目，用户似乎无法登录。我在创建用户后立即调用我的登录方法，但如果他们退出应用程序将不会让他们重新登录。这里是提交登录表单时我得到了什么

这是错误消息

nil:NilClass 的未定义方法“[]”

它说它在会话控制器的第 6 行，但我认为还有其他问题

会话控制器

   class SessionsController < ApplicationController
      def new
      end

    def create
    user = User.find_by_email(params[:session][:email].downcase)
    if user && user.authenticate(params[:session][:password])
      sign_in user
      redirect_to user
    else
      flash.now[:error] = 'Invalid email/password combination'
      render 'new'
    end
  end


def destroy
  sign_out
  redirect_to root_path
end

end

登录表单

    <h1>Sign in</h1>
    <br />

    <%= form_tag sessions_path  do  %>

      <%= label_tag :email %><br />
      <%= text_field_tag :email %><br />

      <%= label_tag :password %><br />
      <%= text_field_tag :password %><br />

      <%= submit_tag "Sign in", class: "button" %>
    <% end %>

    <p>New user? <%= link_to "Sign up now!", signup_path %></p>

路线

Blog::Application.routes.draw do
  get "sessions/new"

  get "users/new"

  resources :posts
  resources :static_pages
  resources :users
  resources :sessions



  root to: 'posts#index'

  match '/signin',   to: 'sessions#new'
  match '/signup',   to: 'users#new' 
  match '/signout',  to: 'sessions#destroy', via: :delete

  match '/about',    to: 'static_pages#about'
  match '/projects', to: 'static_pages#projects'

end

这里还有 rake:routes

    sessions_new GET    /sessions/new(.:format)          sessions#new
       users_new GET    /users/new(.:format)             users#new
           posts GET    /posts(.:format)                 posts#index
                 POST   /posts(.:format)                 posts#create
        new_post GET    /posts/new(.:format)             posts#new
       edit_post GET    /posts/:id/edit(.:format)        posts#edit
            post GET    /posts/:id(.:format)             posts#show
                 PUT    /posts/:id(.:format)             posts#update
                 DELETE /posts/:id(.:format)             posts#destroy
    static_pages GET    /static_pages(.:format)          static_pages#index
                 POST   /static_pages(.:format)          static_pages#create
 new_static_page GET    /static_pages/new(.:format)      static_pages#new
edit_static_page GET    /static_pages/:id/edit(.:format) static_pages#edit
     static_page GET    /static_pages/:id(.:format)      static_pages#show
                 PUT    /static_pages/:id(.:format)      static_pages#update
                 DELETE /static_pages/:id(.:format)      static_pages#destroy
           users GET    /users(.:format)                 users#index
                 POST   /users(.:format)                 users#create
        new_user GET    /users/new(.:format)             users#new
       edit_user GET    /users/:id/edit(.:format)        users#edit
            user GET    /users/:id(.:format)             users#show
                 PUT    /users/:id(.:format)             users#update
                 DELETE /users/:id(.:format)             users#destroy
            root        /                                posts#index
          signin        /signin(.:format)                sessions#new
          signup        /signup(.:format)                users#new
         signout DELETE /signout(.:format)               sessions#destroy
           about        /about(.:format)                 static_pages#about
        projects        /projects(.:format)              static_pages#projects

会话助手

module SessionsHelper

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

    def current_user=(user)
        @current_user = user
    end

    def current_user
        @current_user ||= User.find_by_remember_token(cookies[:remember_token])
    end

    def signed_in?
        !current_user.nil?
    end

    def sign_out
        self.current_user = nil
        cookies.delete(:remember_token)
    end

end
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1 回答 1

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根据您的视图标记，看起来您应该寻找..

params[:email].downcase，而不是 params[:session][:email].downcase。

表单标签的作用域不是会话对象，因此参数匹配不正确。在参数代码中删除会话，你应该没问题。

于 2013-05-08T03:01:25.990 回答