使用NHibernate ICriteria / QueryOver查询等于外连接的条件

Question

如何在Nhibernate / QueryOver / ICriteria的外部联接中执行等于条件？

我发现将surveyRequest.Survey.Id与surveyID进行比较的唯一方法是IsIn。

SystemUser systemUser= null;
SurveyRequests surveyRequest = null;

var query = Session.QueryOver<SystemUser>(() => systemUser)
    .Left.JoinAlias(
        () => systemUser.SurveyRequests, 
        () => surveyRequest,
        Restrictions.On(()=>surveyRequest.Survey.Id).IsIn(new object []{surveyID }))
//                                                   ^^^^

（我正在重复使用之前的query question。）

Answer 1

我们可以使用.Where()

的Restrictions部分

var query = Session.QueryOver<SystemUser>(() => systemUser)
    .Left.JoinAlias(
        () => systemUser.SurveyRequests, 
        () => surveyRequest,
        //Restrictions.On(()=>surveyRequest.Survey.Id).IsIn(new object []{surveyID }))
        Restrictions.Where(()=>surveyRequest.Survey.Id == surveyID ))