Method validate does not exist - Laravel 5.4

问题

I have a very weird problem. When I'm submitting the form, it throws an error with server-side validation.

Here is my simple controller:

namespace App\Http\Controllers;

use Newsletter;
use Illuminate\Http\Request;

class SubscriptionController extends Controller
{
    public function subscribe(Request $request)
    {
        $request->validate([
            'email' => 'required|email',
            ]);
    }
}

Submitting the form gives me:

BadMethodCallException Method validate does not exist.

it should work according to:

https://laravel.com/docs/5.4/validation

回答1:

In docs said:

$this->validate($request, [
    'email' => 'required|email',
]);

This string - works :)

回答2:

You should try this:

$validateFields = array('email' => 'required|email');

$this->validate($request, $validateFields);

$this->validate($request, [
    'email' => 'required|email'
]);

回答3:

Well means its no longer available in 5.4 however its available in controller

Try:

 $this->validate($request, [
    'email' => 'required|email',
 ]);

回答4:

Actually If you add the right controller, validate method should be already included. You can try adding below controller.

Instead: use App\Http\Controllers\Controller;

回答5:

        $validator = \Validator::make($request->all(), [
            'mobile_number' => 'required',]);

        if ($validator->fails()) {
            return redirect()->back()
            ->withErrors($validator)
            ->withInput();
        }

Hope this works for you..

回答6:

You can use the Validator service provider.

     namespace App\Http\Controllers;

     use Newsletter;
     use Illuminate\Http\Request;
     use Validator;

     class SubscriptionController extends Controller
     {
          public function subscribe(Request $request)
          {
                   $request->validate($request->all(),[
                     'email' => 'required|email',
                  ]);
           }