如何为新产品或现有产品添加库存的条件-解网

问：

我是Laravel的初学者，我想创建一个网站来管理库存如果我想为已注册的产品添加库存，或者为尚未注册/还没有库存的产品添加新库存，我想创造条件

public function store(StoreStockGudangRequest $request)
    {
        $validated = $request->validated();
        $product_check = StockGudang::where('product_id', $request->product_id)->where('size_id', $request->size_id)->where('color_id', $request->color_id)->get();

        if($product_check == null){
            StockGudang::create($validated);
        }else{
            StockGudang::where('product_id', $request->product_id)->where('size_id', $request->size_id)->where('color_id', $request->color_id)->increment('stock', $request->stock);

        }
        return redirect('/dashboard/stock')->with('success', 'Stock has been added!');
    }

PHP 的 laravel laravel-8

public function store(StoreStockGudangRequest $request)
{
    $validated = $request->validated();
    $where = [
        'product_id' => $request->product_id,
        'size_id' => $request->size_id,
        'color_id' => $request->color_id
    ];

    $product_check = StockGudang::query()->where($where)->exists();

    if(! $product_check){
        StockGudang::create($validated);
    } else {
        StockGudang::query()->where($where)->increment('stock', $request->get('stock', 1));
    }
    
    return redirect('/dashboard/stock')->with('success', 'Stock has been added!');
}

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如何为新产品或现有产品添加库存的条件

How to make condition to add stock for new product or existing product

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