public List <ProductQuantity> GetAll(int productId, int?sizeId, int?colorId)
{
var query = _productQuantityRepository.GetMulti(x => x.ProductId == productId, new string[] { "Color", "Size" });
if (sizeId.HasValue)
{
query = query.Where(x => x.SizeId == sizeId);
}
if (colorId.HasValue)
{
query = query.Where(x => x.ColorId == colorId);
}
return(query.ToList());
}