Laravel 从自定义验证返回错误消息

Question

I can't find any solution on how to display error messages from custom validation. I can not find it even on StackOverflow. My problem is that I have my controller and I need to validate some stuff in my custom class.

Controller:

public function store()
{
    $customStuff = new MyTestClass();

    $variable =  $customStuff->myCustomValidation(5 );
    
    return view('test.index', compact('variable'));
}

And custom class:

namespace App\Classes;

class MyTestClass
{
    public function myCustomValidation($a = null, $b = null)
    {
        if (empty($a))
        {
            dd('error 1'); // how to throw message here
        }
        elseif (empty($b))
        {
            dd('error 2');  // how to throw message here
        }
        else
        {
            return ($a + $b);
        }
    }
}

This is just a sample code. I know how to use Validator inside Controller but is it possible to return an error back to the user if something is wrong in the custom class ? Instead of dd() , it has to be an error message to the user.

Answer 1

If you want to return that the validation failed to your view then do

return redirect()->back()->withErrors(['Message here!']);

And if you return as a API response then do

return response()->json(['error' => 'Message here!'], 404); // Or any other status code

Answer 2

<?php namespace App\Classes; class MyTestClass { public function myCustomValidation($a = null, $b = null) { abort_if(empty($a), 403, 'error 1'); abort_if(empty($b), 403, 'error 2'); return ($a + $b); } }

Answer 3

Why did you created a plain Class for validation?

You can uselaravel rules if you are trying to create a custom validator

If you don't want to use a validator you can set a flash message