Is it possible to verify getting wildcard requests using Illuminate\Foundation\Http\FormRequest in Laravel?

Question

I have a GET route with wildcard Date.

The day wildcard is a string as follows: 20220507 (YYYYMMDD).

After validating the string I want a correct response. Before sending the response I want to verify the string length and format.

My question is, is it possible to validate the string using Illuminate\Foundation\Http\FormRequest or Illuminate\Http\Request Production: Request? Or do they only accept publishing requests?

Code:

php artisan make:request CalendarDayRequest

Example of getting routes in web.php

Route::get('/calendar/{day}' , 'App\Http\Controllers\HomeController@calendar')->name('calendar');

Sample Controller

use App\Http\Requests\CalendarDayRequest; 
public function calendar ( CalendarDayRequest $request ) {
    // Code
}

Or sample controller 2

use Illuminate\Http\Request;

public function calendar ( Request $request ) {
    $validated = $request->validate([
        'day' => 'required',
     ]);
}

I'm getting the error: Infinite redirect loop, too many redirects.

Answer 1

First, you cannot validate route parameters in form requests

However, you can use regular expressions to validate your routes Example:

Route::get('/calendar/{day}', 'App\Http\Controllers\HomeController@calendar')
    ->name('calendar')
    ->where('day', '/^[0-9]{4}(0[1-9]|1[0-2])(0[1-9]|[1-2][0-9]|3[0-1])$/');

If you still want to use validate() function or form request

$request->merge([
   'day' => $day
]);

$this->validate($request, [
   'day' => 'date_format:Ymd',
]);

Form request method - override all() method

public function all($k = null){
   $data = parent::all($k);
   $data['day'] = $this->route('day');
   return $data;
}

If that doesn't work, try the following code

public function calendar(Request $request, $day){
 $data = $request->all();
 $data['day'] = $day; 

 $validator = Validator::make($data, [
   'day' => 'required|date_format:Ymd',
 ]);
  
 if($validator->fails()){
    // Do Something abort(404);
 }

}

How to verify routing parameters in Laravel 5?

But if you want to use the validate() function, I recommend you send it as a request parameter.