public async Task <bool> TryToSaveOrderAsync(OrderInfo order)
{
if (order.SubOrders == null || order.SubOrders.Count == 0)
{
return(false);
}
// Try to change count of products
if (!await TryToChangeCountOfProductsAsync(order.SubOrders.Select(s => Tuple.Create(s.ProductId, s.Count))))
{
return(false);
}
// Add order and get order id
await Orders.AddAsync(order);
await SaveChangesAsync();
var id = Orders.Last().Id;
// Order sub orders (to add relations)
order.SubOrders = order.SubOrders
.OrderBy(s => s.ProductId)
.ToList();
// Add relations and save sub orders
for (int i = 0; i < order.SubOrders.Count; i++)
{
var subOrder = order.SubOrders[i];
subOrder.OrderId = id;
SubOrders.Add(subOrder);
for (int j = i + 1; j < order.SubOrders.Count; j++)
{
var relation = await GetRelationAsync(new object[] { subOrder.ProductId, order.SubOrders[j].ProductId });
if (relation == null)
{
await AddRelationAsync(new Relation()
{
LesserId = subOrder.ProductId,
BiggerId = order.SubOrders[j].ProductId,
Count = 1
});
}
else
{
relation.Count += 1;
}
}
}
await SaveChangesAsync();
return(true);
}
/// <summary>
/// 释放占用资源
/// </summary>
public override void Dispose()
{
SubOrders.Clear();
}
public async Task <List <SubOrder> > GetSubOrdersAsync(int orderId)
{
return(SubOrders
.Where(or => or.OrderId == orderId)
.ToList());
}
