/// <summary>
/// 分发管理员批准分发
/// </summary>
/// <param name="orderId"></param>
public void StartDistribute(int orderId)
{
var currentOrder = (from c in DbContext.Orders where c.Id == orderId select c).ToList().First();
currentOrder.Status = OrderStatus.AwaitingDelivery;
DbContext.Orders.Attach(currentOrder);
var orderEntry = DbContext.Entry(currentOrder);
orderEntry.Property(e => e.Status).IsModified = true;
DbContext.SaveChanges();
}
public void GenerateOrder(string ISBN, int quantity, string orderOwner)
{
var book = (from c in DbContext.Books where c.ISBN == ISBN select c).ToList();
if (!book.Any())
{
throw new Exception("找不到这本书");
}
var currentBook = book.First();
var relatedOrderId = new Guid().ToString();
if (quantity > currentBook.Quantity)
{
var lackBooks = new T_LackBooks()
{
ISBN = currentBook.ISBN,
Quantity = quantity - currentBook.Quantity,
Status = LackBooksStatus.Unhandled,
RelatedOrderId = relatedOrderId
};
DbContext.LackBooks.Add(lackBooks);
GenerateOutOfStockOrder(ISBN, quantity, orderOwner, relatedOrderId);
DbContext.SaveChanges();
throw new Exception($"该书库存不足 ISBN：{ISBN} 书名：{currentBook.Title}");
}
else
{
//减少库存
currentBook.Quantity -= quantity;
DbContext.Books.Attach(currentBook);
var bookEntry = DbContext.Entry(currentBook);
bookEntry.Property(e => e.Quantity).IsModified = true;
//新建一个订单
var order = new T_Order()
{
OrderOwner = orderOwner,
ISBN = ISBN,
Quantity = quantity,
Status = OrderStatus.Unhandled
};
DbContext.Orders.Add(order);
DbContext.SaveChanges();
}
}