我有这个问题:当我尝试使用对象图实现 Ayende 的复杂搜索时: http ://ayende.com/Blog/archive/2006/12/07/ComplexSearchingQueryingWithNHibernate.aspx:人员:M:1 地址:M :1 Street: M:1 Place: M:1 Country 我收到以下错误:NHibernate.QueryException: 不能在没有投影的条件上使用子查询。我正在这样做:
public List<Person> Find()
{
DetachedCriteria query = DetachedCriteria.For<Person>();
AddAddressQuery(query);
return personRepository.Find(query);
}
private void AddAddressQuery(DetachedCriteria query)
{
DetachedCriteria addressQuery = null;
if (!String.IsNullOrEmpty(SearchParams.HouseNumer))
{
addresaQuery = DetachedCriteria.For<Address>();
addresaQuery.Add(Restrictions.Eq("HouseNumer",
SearchParams.HouseNumer));
}
this.AddStreetQuery(ref addressQuery);
if (addressQuery != null)
{
query.CreateCriteria("Address1",
"address1").Add(Subqueries.Exists(addressQuery));
}
}
private void AddStreetQuery(ref DetachedCriteria query)
{
DetachedCriteria streetQuery = null;
if (this.SearchParams.StreetId.HasValue)
{
streetQuery = DetachedCriteria.For<Street>();
streetQuery .Add( Restrictions.Eq("Id",
this.SearchParams.StreetId.Value));
}
if (streetQuery != null)
{
query = query ?? Query.CreateCriteria("Address1");
query.CreateCriteria("Street",
"street").Add(Subqueries.Exists(streetQuery ));
}
}
我究竟做错了什么?请帮忙