如何在Web Service上为移动应用程序使用Laravel 5.4验证程序

Question

I have a problem with Laravel 5.4 validator which is I'm trying to validate data comes from a mobile application but when validator fails it redirect to the home page. I need to prevent this redirect and return a json response with validation errors messages
Here's my route.php code

Route::group(['middleware' => 'web'], function() {
   Route::post('/userSignUp', [
       'uses' => 'UserController@userSignUp', 
       'as'   => 'userSingUp'
   ]);
});

And this is my controller code

namespace App\Http\Controllers;

use App\Http\Controllers\Controller;
use App\User;
use Illuminate\Http\Request;
use Illuminate\Support\MessageBag;

class UserController extends Controller
{

    public function userSignUp(Request $request){
        $fullName   = $request->input('fullName');
        $email      = $request->input('email');
        $phone      = $request->input('phone');
        $password   = $request->input('password');
        $userType   = $request->input('userType');
        $profilePic = $request->input('profilePic');


        $validator = $this->validate($request, [
                    'fullName' => 'required|max:255',
                    'email'    => 'required|email',
                    'phone'    => 'required'
                ]);

        if ($validator->fails()) {    
            return response()->json($validator->messages(), 200);
        }
    }
} 

So can anyone help me solving this issue I need to use a laravel 5.4 validator in a web service for a mobile application so I need to prevent the validator redirecting as it does in the above code it redirecting to home page when validation is failed
thanks in advance

Answer 1

if the validation fails when you call $this->validate($request,$rules) laravel will throw an exception and a failed validation response will be sent back by this method define in Illuminate\\Foundation\\Validation\\ValidatesRequests :

/**
 * Create the response for when a request fails validation.
 *
 * @param  \Illuminate\Http\Request  $request
 * @param  array  $errors
 * @return \Symfony\Component\HttpFoundation\Response
 */
protected function buildFailedValidationResponse(Request $request, array $errors)
{
    if ($request->expectsJson()) {
        return new JsonResponse($errors, 422);
    }

    return redirect()->to($this->getRedirectUrl())
                    ->withInput($request->input())
                    ->withErrors($errors, $this->errorBag());
}

So it seems that Laravel does handle that by checking $request->expectsJson() so you need to specify the Accept header in you request to JSON, then a JSON formatted response with code 422 will be returned.

Answer 2

return response()
->json(['name' => 'Abigail', 'state' => 'CA'])
->withCallback($request->input('callback'));

from the official doc https://laravel.com/docs/5.4/responses#json-responses

And maybe try to make your validation in your model directly

class User extends Eloquent
{
   private $rules = array(
      'fullName' => 'required|max:255',
      'email'    => 'required|email',
      'phone'    => 'required|numeric'
   );


  public function validate($data)
  {
    // make a new validator object
    $v = Validator::make($data, $this->rules);
    // return the result
    return $v->passes();
  }
}

and in your controller you can make

$new = Input::all();
$u = new User();
if ($b->validate($new))
{

}
else
{

}