DistrictController.php

<?php

namespace App\Http\Controllers;

use App\District;
use Illuminate\Http\Request;

class DistrictController extends Controller
{
    public function provinces()
    {
        $provinces = District::groupBy('province_code')
        ->get();
        return response()->json($provinces);
    }

    public function amphoes($province_code)
    {
        $amphoes = District::where('province_code',$province_code)
        ->groupBy('amphoe_code')
        ->get();
        return response()->json($amphoes);
    }

    public function districts($province_code,$amphoe_code)
    {
        $districts = District::where('province_code',$province_code)
        ->where('amphoe_code',$amphoe_code)
        ->groupBy('district_code')
        ->get();
        return response()->json($districts);
    }

    public function detail($province_code,$amphoe_code,$district_code)
    {
        $districts = District::where('province_code',$province_code)
        ->where('amphoe_code',$amphoe_code)        
        ->where('district_code',$district_code)
        ->get();
        return response()->json($districts);
    }
}