cleanup validation rules

app/Http/Requests/CreateAirlineRequest.php

@@ -7,24 +7,16 @@ use App\Models\Airline;
 
 class CreateAirlineRequest extends FormRequest
 {
-
-    /**
-     * Determine if the user is authorized to make this request.
-     *
-     * @return bool
-     */
     public function authorize()
     {
         return true;
     }
 
-    /**
-     * Get the validation rules that apply to the request.
-     *
-     * @return array
-     */
     public function rules()
     {
-        return Airline::$rules;
+        $rules = Airline::$rules;
+        $rules['iata'] .= '|unique:airlines';
+        $rules['icao'] .= '|unique:airlines';
+        return $rules;
     }
 }

app/Http/Requests/CreateAirportRequest.php

@@ -7,24 +7,15 @@ use Illuminate\Foundation\Http\FormRequest;
 
 class CreateAirportRequest extends FormRequest
 {
-
-    /**
-     * Determine if the user is authorized to make this request.
-     *
-     * @return bool
-     */
     public function authorize()
     {
         return true;
     }
 
-    /**
-     * Get the validation rules that apply to the request.
-     *
-     * @return array
-     */
     public function rules()
     {
-        return Airport::$rules;
+        $rules = Airport::$rules;
+        $rules['icao'] .= '|unique:airports';
+        return $rules;
     }
 }