[英]NHibernate QueryOver For Complex Model
I have a domain object that I'm trying to use QueryOver on to search a property of a sub, sub collection and I'm not sure how to approach this using QueryOver. 我有一个域对象,我正在尝试使用QueryOver来搜索子,子集合的属性,但是我不确定如何使用QueryOver来解决这个问题。
The POCOs look like this: POCO如下所示:
public class Case {
public virtual string CaseId { get; set; }
public virtual string CaseNumber { get; set; }
public virtual IList<Request> Requests { get; set; }
}
It has a collection of Requests: 它具有一组请求:
public class Request {
public virtual int RequestId { get; set; }
public virtual IList<RequestIndividual> RequestIndividuals { get; set; }
}
Which has a collection of Request Individuals: 里面有一组请求者:
public class RequestIndividual {
public virtual int RequestId { get; set; }
public virtual string IndividualType { get; set; }
public virtual string FirstName { get; set; }
public virtual string MiddleName { get; set; }
public virtual string LastName { get; set; }
public virtual string Company { get; set; }
}
Using NHibernate's QueryOver, I'm able to Join to get to my Request collection, but how would I get into the RequestIndividual collection to find one by FirstName? 使用NHibernate的QueryOver,我可以加入到我的Request集合中,但是我将如何进入RequestIndividual集合中以FirstName查找一个呢?
var query = _session.QueryOver<Case>();
if (!string.IsNullOrEmpty(finder.IndividualFirstName))
{
query.JoinAlias(x => x.Requests, () => reuestsAlias, JoinType.LeftOuterJoin)
// This is where I'm stumped. How to query the request for the individuals and find the first name?
}
UPDATE : The complete query looks like this and works, thanks to, xanatos: 更新 :完整的查询如下所示,并且通过xanatos可以工作:
query.JoinAlias(x => x.Requests, () => reuestsAlias, JoinType.LeftOuterJoin)
.JoinAlias(() => reuestsAlias.RequestIndividuals, () => requestIndividiualAlias)
.Where(() => requestIndividiualAlias.FirstName == finder.IndividualFirstName);
From here 从这里
query.JoinAlias(x => x.Requests, () => reuestsAlias, JoinType.LeftOuterJoin)
You do this: 你做这个:
RequestIndividual requestIndividualAlias;
query.JoinAlias(() => reuestsAlias.RequestIndividuals, () => requestIndividualAlias);
There is a whole "set" of QueryOver
methods that instead of being x => x.
有一个完整的
QueryOver
方法“集合”,而不是x => x.
are () => alias.
是
() => alias.
. 。 I normally ALWAYS prefer to use them (and to use
JoinAlias
instead of JoinQueryOver
) because it's explicit what you are speaking of (with JoinQueryOver
you have to think... x => x.
, but x
what is? 我通常总是喜欢使用它们(并使用
JoinAlias
而不是JoinQueryOver
),因为它明确表明了您的意思(对于JoinQueryOver
您必须考虑... x => x.
,但是x
是什么?
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