laravel-5.4 - 错误:从空值创建默认对象

问题描述

我想在数据库中存储图像路径.vendorlaravelframeworksrcIlluminateFoundationAuthRegistersUsers.php 下的我的控制器代码如下:

I want to store image path in database. My Controller code undervendorlaravelframeworksrcIlluminateFoundationAuthRegistersUsers.php follows:

public function register(Request $request)
{
    $this->validator($request->all())->validate();

    if($request->hasFile('image')) {
    $image_name = $request->file('image')->getClientOriginalName();              
    $image_path = $request->file('image')->store('public'); 
    $user->image = Storage::url($image_name);
    $user->save();
    }

    event(new Registered($user = $this->create($request->all())));

   // $this->guard()->login($user); disable autologin for new users

    return $this->registered($request, $user)
                    ?: redirect($this->redirectPath());
}

我收到以下错误:RegistersUsers.php 第 40 行中的 ErrorException:从空值创建默认对象 .

I am getting the following error: ErrorException in RegistersUsers.php line 40: Creating default object from empty value .

图像正在保存在公共文件夹中，但无法将图像路径保存在用户表数据库中.用户表的架构
Schema::create('users', function (Blueprint $table) {$table->increments('user_id');$table->string('name');$table->string('image');$table->rememberToken();$table->timestamps();

The image is getting saved in public folder but not able to save image path in the user table database. schema of user table
Schema::create('users', function (Blueprint $table) { $table->increments('user_id'); $table->string('name'); $table->string('image'); $table->rememberToken(); $table->timestamps();

如何将图像路径存储在数据库中的用户表中

how to proceed to store the image path in the user table in database

推荐答案

你还没有初始化变量 $user 所以在控制器中，在使用它之前你必须添加 $user = new User; 假设你已经有 use AppUser;

you haven't initialized the variable $user so in the controller and before using it you've to add $user = new User; assuming that you already have use AppUser;

或 $user = new AppUser; 如果你不这样做.

or $user = new AppUser; if you don't.

更新如果您尝试更新现有的用户记录，您必须通过根据应在请求中发送的主键进行选择来初始化 $user 变量，然后进行如下初始化:

Update if you're trying to update an existing user record you've to initialize the $user variable by selecting based on it's primary key which should be sent in the request and then doing the initialization like:

$user_id = $request->input('user_id');
$user = User::find($user_id);

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