Discussion on: How to implement a simple like system with Laravel

'id' => [
                "required",
                function ($attribute, $value, $fail) {
                    $class = $this->getClass($value);

                    if (! $class::where('id', $value)->exists()) {
                        $fail($value." is not present in database");
                    }
                },
            ],

$class = $this->getClass($this->input('likeable'));