[英]NHibernate QueryOver For Complex Model
我有一個域對象,我正在嘗試使用QueryOver來搜索子,子集合的屬性,但是我不確定如何使用QueryOver來解決這個問題。
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; }
}
它具有一組請求:
public class Request {
public virtual int RequestId { get; set; }
public virtual IList<RequestIndividual> RequestIndividuals { get; set; }
}
里面有一組請求者:
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; }
}
使用NHibernate的QueryOver,我可以加入到我的Request集合中,但是我將如何進入RequestIndividual集合中以FirstName查找一個呢?
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?
}
更新 :完整的查詢如下所示,並且通過xanatos可以工作:
query.JoinAlias(x => x.Requests, () => reuestsAlias, JoinType.LeftOuterJoin)
.JoinAlias(() => reuestsAlias.RequestIndividuals, () => requestIndividiualAlias)
.Where(() => requestIndividiualAlias.FirstName == finder.IndividualFirstName);
從這里
query.JoinAlias(x => x.Requests, () => reuestsAlias, JoinType.LeftOuterJoin)
你做這個:
RequestIndividual requestIndividualAlias;
query.JoinAlias(() => reuestsAlias.RequestIndividuals, () => requestIndividualAlias);
有一個完整的QueryOver
方法“集合”,而不是x => x.
是() => alias.
。 我通常總是喜歡使用它們(並使用JoinAlias
而不是JoinQueryOver
),因為它明確表明了您的意思(對於JoinQueryOver
您必須考慮... x => x.
,但是x
是什么?
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