ruby-on-rails – Rails路由到错误的URL

<%form_tag(:controller=>"users",:action=>"index")  do %>
  Name: <%=text_field_tag "name"  %><br>    
  Password: <%=password_field_tag "password" %><br>
  <%=submit_tag "Login"  %>
<% end -%>

令人惊讶的是,rails路由将页面定向到“新”视图,而浏览器导航栏仍然显示：

http://0.0.0.0:3000/users

刷新页面时,它会显示正常的“索引”页面.

为什么会这样？

更令人毛骨悚然的是,当我将上面代码中的：action更改为：action =>“new”时,屏幕显示“路由错误”.当我刷新它时,它呈现正常的“新”视图.

users_controller.rb如下：

class UsersController < ApplicationController

  def index
    @users=User.all
    respond_to do |format|
      format.html # index.html.erb
      format.xml  { render :xml => @users }
    end
  end

  def show
    @user = User.find(params[:id])
    respond_to do |format|
      format.html # show.html.erb
      format.xml  { render :xml => @user }
    end
  end

  def login
    flash[:notice]="Hello";
  end

  def new

  end

  def create
    @user = User.new(params[:project])

    respond_to do |format|
      if @user.save
        format.html { redirect_to(@user,:notice => 'user was successfully created.') }
        format.xml  { render :xml => @user,:status => :created,:location => @user }
      else
        format.html { render :action => "new" }
        format.xml  { render :xml => @user.errors,:status => :unprocessable_entity }
      end
    end
  end
end

我的routes.rb如下：

Testdrive::Application.routes.draw do

  resources :users do
    member do
      post 'login'
    end
  end
  resources :cars