Question

**DefaultController.php**

这是我的DefaultController.php文件，我将在symfony中进入简单的登录页面我想用控制器中提到的名字显示你好，请指导我，我是symfony的新人。

<?php

namespace AppBundle\Controller;
use AppBundle\Entity\users;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;
use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\RedirectResponse;
use Symfony\Component\HttpFoundation\Response;




class DefaultController extends Controller
{

    /**
     * @Route("/login", name="login")
     */

    public function loginAction(Request $request)
    {

        if($request->getMethod()=='POST'){
            $username=$request->get('username');
            $password=$request->get('password');

            $em=$this->getDoctrine()->getEntityManager();
            $repository=$em->getRepository('AppBundle:users');
            $user=$repository->findOneBy(array('userName'=>$username, 'password'=>$password)); 



        if($user)
        {
        return $this->render('default/login.html.twig', array('name' =>$user->getFirstName()));
        }
        }
        else{
        return $this->render('default/login.html.twig');
        }
    }


}


**login.html.twig**

这是我在symfony中的登录页面，想要显示我在 Hello {{name}} 这一行中提到的名字你好，如果需要请做一些修改。

<html>
<head>
{% block stylesheets %}
<link rel="stylesheet" href="{{ asset('templates/css/1.css') }}">
{% endblock %}
</head>
<body>


{% block container %}

<div class="wrapper">
        <h2>Login User</h2>                    
        <form class="form-sigin" method="POST" action="{{path('login')}}">
        <div><input type="text" name="user_name" class="txtbox" placeholder="User Name"></div>
        <div><input type="password" name="password" class="txtbox" placeholder="Password"></div>
        <div><input type="checkbox"><span>Remember</span></div>
        <div><input type="submit" value="Log In" class="loginBtn"></div>
        <div><span><a href="">Forgot Password</a></span></div>
        </form>
    </div>
    {% if name is defined  %}
    <div class="alert-info fade in">
    <strong>Hello {{name}}</strong>
    </div>
    {% endif  %}
    {% endblock %}  
    </body>
    </html>

**users.php**

<?php

namespace AppBundle\Entity;

use Doctrine\ORM\Mapping as ORM;

/**
 * users
 *
 * @ORM\Table(name="users")
 * @ORM\Entity(repositoryClass="AppBundle\Repository\usersRepository")
 */
class users
{
    /**
     * @var int
     *
     * @ORM\Column(name="id", type="integer")
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    private $id;

    /**
     * @var string
     *
     * @ORM\Column(name="user_name", type="string", length=255)
     */
    private $userName;

    /**
     * @var string
     *
     * @ORM\Column(name="first_name", type="string", length=255)
     */
    private $firstName;

    /**
     * @var string
     *
     * @ORM\Column(name="password", type="string", length=255)
     */
    private $password;


    /**
     * Get id
     *
     * @return int
     */
    public function getId()
    {
        return $this->id;
    }

    /**
     * Set userName
     *
     * @param string $userName
     *
     * @return users
     */
    public function setUserName($userName)
    {
        $this->userName = $userName;

        return $this;
    }

    /**
     * Get userName
     *
     * @return string
     */
    public function getUserName()
    {
        return $this->userName;
    }

    /**
     * Set firstName
     *
     * @param string $firstName
     *
     * @return users
     */
    public function setFirstName($firstName)
    {
        $this->firstName = $firstName;

        return $this;
    }

    /**
     * Get firstName
     *
     * @return string
     */
    public function getFirstName()
    {
        return $this->firstName;
    }

    /**
     * Set password
     *
     * @param string $password
     *
     * @return users
     */
    public function setPassword($password)
    {
        $this->password = $password;

        return $this;
    }

    /**
     * Get password
     *
     * @return string
     */
    public function getPassword()
    {
        return $this->password;
    }
}

Answer 1

你有一个糟糕的缩进来看问题..试试这个：

     if($request->getMethod()=='POST')
     {
        $username=$request->get('username');
        $password=$request->get('password');

        $em=$this->getDoctrine()->getEntityManager();
        $repository=$em->getRepository('AppBundle:users');
        $user=$repository->findOneBy(array('userName'=>$username, 'password'=>$password)); 

        if($user)
        {
            return $this->render('default/login.html.twig', array('name' =>$user->getFirstName()));
        } else {
            return $this->render('default/login.html.twig');
        }
    } else{
        return $this->render('default/login.html.twig');
    }

问题是你在POST请求中但是没有用户，所以它不会进入任何回复。

在这种情况下，我添加了一个新条件else。

我不知道逻辑对你是否正确，但问题在于

控制器必须返回响应（给定null）。您是否忘记在控制器中的某处添加return语句？请

1 个答案: