ruby-on-rails - Rails 3 路由错误 : No route matches {:controller= >"user_sessions"}

Question

我将尽可能高层次地概述这一点。我正在尝试访问 http://localhost:3000/login

错误是:

No route matches {:controller=>"user_sessions"}

下面的 new.html.erb 文件中的这一行出错了:

<%= form_for(@user_session) do |f| %>

routes.rb中的路由是:

match 'login' => 'user_sessions#new', :as => :login

user_sessions_controller.rb 是:

class UserSessionsController < ApplicationController
  def new
    @user_session = UserSession.new
  end

  def create
    @user_session = UserSession.new(params[:user_session])
    if @user_session.save
      flash[:notice] = "Successfully logged in."
      redirect_to root_path
    else
      render :action => 'new'
    end
  end

  def destroy
    @user_session = UserSession.find
    @user_session.destroy
    flash[:notice] = "Successfully logged out."
    redirect_to root_path
  end
end

登录页面的实际 View 如下(new.html.erb):

<h1>Login</h1>

<%= form_for(@user_session) do |f| %>
  <% if @user_session.errors.any? %>
    <div id="error_explanation">
      <h2><%= pluralize(@user_session.errors.count, "error") %> prohibited this user from being saved:</h2>

      <ul>
      <% @user_session.errors.full_messages.each do |msg| %>
        <li><%= msg %></li>
      <% end %>
      </ul>
    </div>
  <% end %>
  <p>
    <%= f.label :login %><br />
    <%= f.text_field :login %>
  </p>
  <p>
    <%= f.label :password %><br />
    <%= f.password_field :password %>
  </p>
  <p><%= f.submit "Submit" %></p>
<% end %>

谢谢。

Answer 1

单独使用 form_for(@user_session) 将尝试使用您在 routes.rb 中定义的资源构建路径。你目前没有的(我假设，因为你没有提到它。如果我错了请更正。)。

一些方法..

添加资源并限制到你需要的资源

resources :user_sessions, :only => [:create, :destroy]

这些将使用默认路由命名，但您可以根据需要自定义它。

---

匹配出你需要的路线。

match 'login' => 'user_sessions#create', :as => :post_login, :via => :post

查看

= form_for(@user_session), :url => post_login_path do |f|
...