private static GoodsCarDTO ToDTO(GoodsCarEntity entity, string imgUrl)
{
GoodsCarDTO dto = new GoodsCarDTO();
dto.GoodsId = entity.GoodsId;
dto.UserId = entity.UserId;
dto.Code = entity.Goods.Code;
dto.CreateTime = entity.CreateTime;
dto.Description = entity.Goods.Description;
dto.Id = entity.Id;
if (string.IsNullOrEmpty(imgUrl))
{
dto.ImgUrl = "";
}
else
{
dto.ImgUrl = imgUrl;
}
dto.Name = entity.Goods.Name;
dto.Price = entity.Goods.Price;
dto.RealityPrice = entity.Goods.RealityPrice;
dto.Standard = entity.Goods.Standard;
dto.Number = entity.Number;
dto.IsSelected = entity.IsSelected;
dto.GoodsAmount = entity.Goods.RealityPrice * entity.Number;
dto.Inventory = entity.Goods.Inventory;
return(dto);
}
public async Task <long> UpdateAsync(long userId, long goodsId, long?num, bool?isSelected)
{
using (MyDbContext dbc = new MyDbContext())
{
GoodsCarEntity entity = await dbc.GetAll <GoodsCarEntity>().SingleOrDefaultAsync(g => g.UserId == userId && g.GoodsId == goodsId);
if (entity == null)
{
return(-1);
}
GoodsEntity goods = await dbc.GetAll <GoodsEntity>().SingleOrDefaultAsync(g => g.Id == entity.GoodsId);
if (goods == null)
{
return(-2);
}
if (num != null)
{
if (goods.Inventory < num)
{
return(-3);
}
entity.Number = num.Value;
}
if (isSelected != null)
{
entity.IsSelected = isSelected.Value;
}
await dbc.SaveChangesAsync();
return(1);
}
}
public async Task <long> AddAsync(long userId, long goodsId, long num)
{
using (MyDbContext dbc = new MyDbContext())
{
var goodsCar = await dbc.GetAll <GoodsCarEntity>().SingleOrDefaultAsync(g => g.UserId == userId && g.GoodsId == goodsId);
var goods = await dbc.GetAll <GoodsEntity>().SingleOrDefaultAsync(g => g.Id == goodsId);
if (goods == null)
{
return(-1);
}
if (goodsCar != null)
{
if (num <= 0)
{
if (num != -1)
{
return(-3);//购物车减商品数量,只能传-1
}
if (goodsCar.Number == 1)
{
return(-4);//购物车减商品数量,购物车商品数量不能小于1
}
goodsCar.Number = goodsCar.Number + num;
}
else
{
if (goods.Inventory < goodsCar.Number + num)
{
return(-2);
}
goodsCar.Number = goodsCar.Number + num;
}
}
else
{
if (num <= 0)
{
return(-5);//如果记录不存在，添加购物车的商品数量不能小于1
}
if (goods.Inventory < num)
{
return(-2);
}
goodsCar = new GoodsCarEntity();
goodsCar.GoodsId = goodsId;
goodsCar.UserId = userId;
goodsCar.Number = num;
dbc.GoodsCars.Add(goodsCar);
}
await dbc.SaveChangesAsync();
return(goodsCar.Id);
}
}
public async Task <bool> DeleteAsync(long id)
{
using (MyDbContext dbc = new MyDbContext())
{
GoodsCarEntity entity = await dbc.GetAll <GoodsCarEntity>().SingleOrDefaultAsync(g => g.Id == id);
if (entity == null)
{
return(false);
}
entity.IsDeleted = true;
await dbc.SaveChangesAsync();
return(true);
}
}