contoh controller resource laravel

<?php
namespace App\Http\Controllers\Transactions;
use Illuminate\Http\Request;
use App\Http\Controllers\Controller;
use App\Purchases;

class PurchasesController extends Controller
{
    public function index() {
        $result = Purchases::where("TransactionType", "=", "Purchases")->with('legalEntity', 'branch', 'inventoryBranch.inventory', 'supplier')->get();
        return response()->json($result);
    }

    public function store(Request $request) {
        Purchases::create($request->all());
        return response()->json(['message' => 'Successfull create']);
    }

    public function show($id) {
        $result = Purchases::with('inventoryBranch.inventory')->find($id);
        return response()->json($result);
    }

    public function update(Request $request, $id) {
        $result = Purchases::find($id);
        $result->update($request->all());
        return response()->json([ 'message' => 'Successfull update']);
    }

    public function delete($id) {
        Purchases::destroy($id);
        return response()->json([ 'message' => 'Successfull delete']);
    }
}