我刚来拉拉维尔。如何查找是否存在记录?
$user = User::where('email', '=', Input::get('email'));
我能做什么来查看$user是否有记录?
我刚来拉拉维尔。如何查找是否存在记录?
$user = User::where('email', '=', Input::get('email'));
我能做什么来查看$user是否有记录?
当前回答
这取决于您是想在之后使用用户,还是只检查是否存在一个用户。
如果用户对象存在,你想使用它:
$user = User::where('email', '=', Input::get('email'))->first();
if ($user === null) {
// user doesn't exist
}
如果你只是想检查一下
if (User::where('email', '=', Input::get('email'))->count() > 0) {
// user found
}
或者更好
if (User::where('email', '=', Input::get('email'))->exists()) {
// user found
}
其他回答
$user = User::where('email', request('email'))->first();
return (count($user) > 0 ? 'Email Exist' : 'Email Not Exist');
在你的控制器中
$this->validate($request, [
'email' => 'required|unique:user|email',
]);
在您的视图-显示已经存在的消息
@if (count($errors) > 0)
<div class="alert alert-danger">
<ul>
@foreach ($errors->all() as $error)
<li>{{ $error }}</li>
@endforeach
</ul>
</div>
@endif
最短工作选项:
// if you need to do something with the user
if ($user = User::whereEmail(Input::get('email'))->first()) {
// ...
}
// otherwise
$userExists = User::whereEmail(Input::get('email'))->exists();
拉拉维尔 5.6.26v
通过主键(电子邮件或id)查找现有记录
$user = DB::table('users')->where('email',$email)->first();
然后
if(!$user){
//user is not found
}
if($user){
// user found
}
包括“use DB”和表名user变成复数,使用上面的查询,就像user变成users
简单,舒适和易于理解的Validator
class CustomerController extends Controller
{
public function register(Request $request)
{
$validator = Validator::make($request->all(), [
'name' => 'required|string|max:255',
'email' => 'required|string|email|max:255|unique:customers',
'phone' => 'required|string|max:255|unique:customers',
'password' => 'required|string|min:6|confirmed',
]);
if ($validator->fails()) {
return response(['errors' => $validator->errors()->all()], 422);
}