小编Naj*_*era的帖子

我正在尝试使用SQL函数CONSTAINS来过滤QueryOver API上的一些数据.

主要问题是我不能SqlFunction在where子句中使用,它不能编译,因为ICriterion需要a.

var result = Session.QueryOver<Individual>()
    .Where(Projections.SqlFunction(
        "FullTextContains", NHibernateUtil.Boolean,
        Projections.Property<Individual>(x => x.LastName),
        Projections.Constant("something")))
        .List();

我试图将它与TRUE常量匹配,但是当执行查询时它会生成语法错误,因为CONSTAINS函数不能与equals运算符一起使用.

var result = Session.QueryOver<Individual>()
    .Where(Restrictions.Eq(Projections.SqlFunction(
        "FullTextContains", NHibernateUtil.Boolean,
        Projections.Property<Individual>(p => p.LastName),
        Projections.Constant("something")), true))
        .List();

如何在QueryOver API的 where表达式中直接使用布尔sql函数？

可以说我们有以下型号:

public class ReadingOrder
{
    public virtual int Id { get; set; }
    public virtual Order Order { get; set; }
}

制图:

Table("db_ReadingOrder");
Id(o => o.Id).Column("Id").GeneratedBy.Identity();
References(o => o.Order, "OrderId");

我想获得ReadingOrder它具有orderId与1(例如)相等.但是当我尝试a时FirstOrDefault,查询返回null:

var readingO = _repositoryFactory.GetRepository<ReadingOrder>().FirstOrDefault(xz => xz.Order.Id == 1);

如果我得到所有这些并在申请FirstOrDefault作品后,但它的愚蠢:

var readingOrderList1 = _repositoryFactory.GetRepository<ReadingOrder>()
                         .GetAll().FirstOrDefault(xz => xz.Order.Id == 1);

存储库中的方法具有以下格式:

public T FirstOrDefault(Expression<Func<T, bool>> predicate)
{
   return _session.Query<T>().FirstOrDefault(predicate);
}

简单的东西,但不工作.如果我去寻找一个正常的房产,那么Id一切都按预期进行.此外,如果我从日志中获取生成的查询并将其放在sqlite中,它将成功运行并返回读取顺序.NHibernate有错误吗？是映射问题吗？或者是SQLite的问题？

有人可以解释为什么MsSql2012Dialect上的NHibernate生成服务器无法处理的查询吗？当没有明确指定排序时，它将以这种方式构建查询。

...
ORDER BY CURRENT_TIMESTAMP
OFFSET 0 ROWS FETCH FIRST 10 ROWS ONLY 

我在使用Hibernate Spatial和PostGIS时遇到问题.我有一个像这样的字段的实体:

public class LocationBean {
  @Id
  @GeneratedValue(strategy = GenerationType.AUTO)
  private long id;

  @Type(type = "org.hibernate.spatial.GeometryType")
  private Point location;
}

我遇到的问题是我无法从数据库中加载任何这些实体,除非该实体的location为null.如果它不为null,我会收到以下错误:

Exception: Can't convert object of type org.postgresql.util.PGobject
javax.el.ELException: /protected/topPanel/searchBar.xhtml @27,57 completeMethod="#{toppanelbb.completeSearchBar}": java.lang.IllegalArgumentException: Can't convert object of type org.postgresql.util.PGobject
at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:111)
at org.primefaces.component.autocomplete.AutoComplete.broadcast(AutoComplete.java:337)
at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:790)
at javax.faces.component.UIViewRoot.processDecodes(UIViewRoot.java:931)
at com.sun.faces.lifecycle.ApplyRequestValuesPhase.execute(ApplyRequestValuesPhase.java:78)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:198)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:646)
at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1682)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:344)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214)
at org.primefaces.webapp.filter.FileUploadFilter.doFilter(FileUploadFilter.java:70)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:256)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214)
at org.glassfish.tyrus.servlet.TyrusServletFilter.doFilter(TyrusServletFilter.java:253)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:256)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214)
at org.ocpsoft.rewrite.servlet.RewriteFilter.doFilter(RewriteFilter.java:205)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:256)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214)
at …