Laravel检查记录是否存在 [英] Laravel Checking If a Record Exists

问题描述

我是Laravel的新手.请原谅新手问题，但是如何查找记录是否存在?

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'));

在这里我该如何查看$user是否有记录?

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

推荐答案

这取决于您之后是否要与用户一起使用，或者仅检查是否存在.

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

如果要使用用户对象(如果存在):

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
}

如果您只想检查

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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