Laravel：此集合实例上不存在属性 [email]
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Laravel: Property [email] does not exist on this collection instance
提问by horcrux88
Hi I keep getting an error saying property [email] does not exist on this collection instance. What am I doing wrong? What is the correct way to retrieve the email address?
嗨，我不断收到错误消息，指出此集合实例上不存在属性 [email]。我究竟做错了什么？检索电子邮件地址的正确方法是什么？
Here is my code in controller:
这是我在控制器中的代码：
public function runCommand(Request $request){
$user = User::select("id", "email")->get();
$signature = $request->input('signature');
$command = Artisan::call($signature, ['user' => $user->email]);
return response($command);
}
回答by Jerodev
You are selecting all users from the database. And a collection of users does not have a single property email. You should add a filter and use the first()function to get a single user object from the database.
您正在从数据库中选择所有用户。并且用户集合没有单一属性email。您应该添加一个过滤器并使用该first()函数从数据库中获取单个用户对象。
Like so:
像这样：
$user = User::where('id', 1)->select("id", "email")->first();
dd($user->email);
回答by Vahe Shak
get()method returns collection, use first().
get()方法返回集合，使用 first().
$user = User::where('id', $id)->select("id", "email")->first();
