pedi2/routes/api.php

<?php

use Illuminate\Http\Request;
use Illuminate\Support\Facades\Route;
use App\GrupoDeCompra;

/*
|--------------------------------------------------------------------------
| API Routes
|--------------------------------------------------------------------------
|
| Here is where you can register API routes for your application. These
| routes are loaded by the RouteServiceProvider within a group which
| is assigned the "api" middleware group. Enjoy building your API!
|
*/

Route::middleware('auth:api')->group(function () {
    Route::get('/regiones', function() {
    	return GrupoDeCompra::all()->pluck('region')->unique()->flatten();
    });

    Route::prefix('grupos-de-compra')->group( function(){
    	Route::get('/', function() {
	    	$atributos_a_ocultar = ['id', 'telefono', 'cantidad_de_nucleos', 'correo', 'referente_finanzas', 'created_at', 'updated_at']; 
    		return GrupoDeCompra::all()->makeHidden($atributos_a_ocultar)->sortBy('nombre')->groupBy('region');
    	});
    });
});