Laravel 检查记录是否存在

Laravel Checking If a Record Exists(Laravel 检查记录是否存在)

问题描述

我是 Laravel 的新手.请原谅新手问题，但我如何找到记录是否存在?

I am new to Laravel. Please excuse the newbie question but how do I find if a record exists?

$user = User::where('email', '=', Input::get('email'));

我可以在这里做什么来查看 $user 是否有记录?

What can I do here to see if $user has a record?

推荐答案

这取决于你是想事后与用户合作还是只检查是否存在.

It depends if you want to work with the user afterwards or only check if one exists.

如果你想使用存在的用户对象:

If you want to use the user object if it exists:

$user = User::where('email', '=', Input::get('email'))->first();
if ($user === null) {
   // user doesn't exist
}

如果你只想检查

if (User::where('email', '=', Input::get('email'))->count() > 0) {
   // user found
}

甚至更好

if (User::where('email', '=', Input::get('email'))->exists()) {
   // user found
}

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