grosir-obat/app/Http/Controllers/ProductsController.php

<?php

namespace App\Http\Controllers;

use App\Product;
use Illuminate\Http\Request;

class ProductsController extends Controller
{
    public function index(Request $request)
    {
        $editableProduct = null;
        $q = $request->get('q');
        $products = Product::where(function($query) use ($q) {
                if ($q) {
                    $query->where('name', 'like', '%' . $q . '%');
                }
            })
            ->orderBy('name')->paginate(25);

        if (in_array($request->get('action'), ['edit','delete']) && $request->has('id'))
            $editableProduct = Product::find($request->get('id'));

        return view('products.index', compact('products','editableProduct'));
    }

    public function store(Request $request)
    {
        $this->validate($request, [
            'name' => 'required|max:20',
            'cash_price' => 'required|numeric',
            'credit_price' => 'nullable|numeric',
        ]);

        Product::create($request->only('name','cash_price','credit_price'));

        flash(trans('product.created'), 'success');

        return redirect()->route('products.index');
    }

    public function update(Request $request, $productId)
    {
        $this->validate($request, [
            'name' => 'required|max:20',
            'cash_price' => 'required|numeric',
            'credit_price' => 'nullable|numeric',
        ]);

        $routeParam = $request->only('q');

        $product = Product::findOrFail($productId)->update($request->only('name','cash_price','credit_price'));

        flash(trans('product.updated'), 'success');

        return redirect()->route('products.index', $routeParam);
    }

    public function destroy(Request $request, $productId)
    {
        $this->validate($request, [
            'product_id' => 'required|exists:products,id',
        ]);

        if ($request->get('product_id') == $productId && Product::findOrFail($productId)->delete()) {
            flash(trans('product.deleted'), 'success');
            return redirect()->route('products.index');
        }

        flash(trans('product.undeleted'), 'error');
        return back();
    }
}