Laravel 未定义变量中的 ErrorException
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/51158554/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
ErrorException in Laravel Undefined variable
提问by Stranger
I am new to Laravel and I am using Relations now, but I am getting an error as
我是 Laravel 的新手，我现在正在使用关系，但我收到一个错误
ErrorException :Undefined variable: users (View: D:\Softwares\WampServer\www\LaravelRelations\resources\views\users\index.blade.php)
ErrorException ：未定义变量：用户（视图：D:\Softwares\WampServer\www\LaravelRelations\resources\views\users\index.blade.php）
Controller is inusersController.php
控制器在usersController.php
public function index()
{
$users = \App\User::all();
return view('users.index', compact($users));
}
Route is defined inweb.php
路线定义在web.php
Route::resource('users', 'usersController');
Models areUser.phpandRole.phpas
模型是User.php和Role.php作为
<?php
//User.php
namespace App;
use Illuminate\Database\Eloquent\Model;
class User extends Model
{
public function role() {
return $this->belongsTo('\App\Role');
}
}
<?php
//Role.php
namespace App;
use Illuminate\Database\Eloquent\Model;
class Role extends Model
{
public function user() {
return $this->hasMany('\App\User');
}
}
and here's theindex.blade.phpin users folder as
这是index.blade.php在用户文件夹中
<!DOCTYPE html>
<html>
<head>
<title></title>
</head>
<body>
<ul>
<?php
foreach ($users as $user) {
echo "<li>" . $user->username . "is" . $user->role->role_name;
}
?>
</ul>
</body>
</html>The error is in this line foreach ($users as $user) {in $users variable
该错误是在此行foreach ($users as $user) {中$users variable
回答by Davit
Wrong part of your code is compact($users)It must be compact('users'). Fixed code is
代码的错误部分是compact($users)It must be compact('users')。固定代码是
public function index()
{
$users = \App\User::all();
return view('users.index', compact('users');
}
compact('users')is equivalent ['users' => $users]
compact('users')是等价的['users' => $users]
回答by Stranger
Try this
尝试这个
public function index()
{
$users = \App\User::all();
return view('users.index', ['users' => $users] );
}
