Laravel eoquent在那里的存在

代码示例

laravel更新，如果存在或创建

$flight = App\Flight::updateOrCreate(
    ['departure' => 'Oakland', 'destination' => 'San Diego'],
    ['price' => 99]
);

laravel如何检查，如果有记录存在

//User::  User is going to be what model you use.
//$user can be what ever you need it to be
$user = User::where('email', '=', Input::get('email'))->first();
if ($user != null) {
   // Record does exist
}

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