在提交之前从上下文中取回数据

Question

customers customer = GetCustomer();
customer.UserId = userId;
customer.NeedToPayTax = true;
customer.IsApproved = false;
_customerRepository.Create(customer);

稍后在我们进行提交之前，我尝试搜索这个新的customer

public int GetUncofirmedCount()
{
    var query = from p in _context.Set<customers>()
                where p.IsApproved == false
                select p;

    return query.Count();
}

但大小始终为0。如果我提交，那么我可以看到正确的结果。为什么？即使尚未提交，如何从上下文中取回数据？

Answer 1

未经测试的代码：

    _customerRepository.ObjectStateManager.GetObjectStateEntries(EntityState.Added)
.Where(o => o.GetType() == typeof(Customer) && o => !o.IsApproved)
.Count();

或者，对于较新版本的 EF，请查看 Local；

_customerRepository.Customers.Local
    .Where(o => o.GetType() == typeof(Customer) && o => !o.IsApproved)
    .Count();