Question

我收到以下错误

抛出了类型'Antlr.Runtime.NoViableAltException'的异常。 [.OrderBy [ORM.Entities.Core.Message，System.DateTime的]（其中[ORM.Entities.Core.Message]（NHibernate.Linq.NhQueryable`1 [ORM.Entities.Core.Message] 引用（（x，）=＆gt; （AndAlso（AndAlso（String.op_Equality（x.ConcerningItemType，p1）， Equal（x.ConcerningItemId，p2）），OrElse（Equal（x.Sender.Id，p3）， .Any [ORM.Entities.Core.MessageRecipient]（x.Recipients，（r，）=＆gt; （Equal（r.Employee.Id，p4）），））））），），Quote（（x，）=＆gt; （.FirstORM.Entities.Core.AuditGroup.Created）），）]

当我有一个IQueryable结果集（刚刚应用了一些逻辑）然后我尝试在调用ToList（）之前通过子属性变量对它进行排序

var results = query.Where(x => x.ConcerningItemType == "1422" && x.ConcerningItemId == EnquiryId && //Messages for this Enquiry
                            (x.Sender.Id == EmployeeId || x.Recipients.Any(r => r.Employee.Id == EmployeeId)));

然后我尝试订购导致错误的

var results2 = results.OrderBy(x => x.AuditGroup.First().Created).ToList();

如果我执行以下操作而不是出现错误（移动tolist以强制它命中数据库）

var results3 = results.ToList().OrderBy(x => x.AuditGroup.First().Created);

询问更多信息

AuditGroup Class

    public class AuditGroup : Entity
{
    public virtual string Guid { get; set; }
    public virtual string PageName { get; set; }
    public virtual string ControlId { get; set; }
    public virtual string ItemType { get; set; }
    public virtual int ItemId { get; set; }
    public virtual int EmployeeId { get; set; }
    public virtual string IPAddress { get; set; }
    public virtual string Parameters { get; set; }
    public virtual DateTime Created { get; set; }

}

消息类

    public class Message : Entity
{
    // This class represents the standard address fields, for reuse in other entities
    // 
    public virtual int Id { get; set; }
    public virtual int ConcerningItemId { get; set; }
    public virtual String ConcerningItemType { get; set; }
    public virtual String Subject { get; set; }
    public virtual String Body { get; set; }
    public virtual int RecipientCount { get; set; }
    public virtual String RowStatus { get; set; }

    public virtual Employee Sender { get; set; }
    public virtual ICollection<MessageRecipient> Recipients { get; set; }

    //eww have to do this to be able to access the created date of the message (stored in AuditGroup... Stupidly!)
    public virtual ICollection<AuditGroup> AuditGroup { get; set; }
}

消息映射

        public MessageMapping()
    {
        Id(x => x.Id).Column("MessageId");
        Map(x => x.ConcerningItemId).Nullable().Column("ItemId");
        Map(x => x.ConcerningItemType).Nullable().Column("ItemType");

        Map(x => x.Subject).Nullable();
        Map(x => x.Body);
        Map(x => x.RecipientCount).Column("MessageRecipientCount");
        Map(x => x.RowStatus).Column("MessageRowStatus");

        References(x => x.Sender).Column("EmployeeId");
        HasMany(x => x.Recipients).KeyColumn("MessageId");

        //AuditGroup has ItemId-ItemType Needs to map to MessageId-ItemType
        HasMany(x => x.AuditGroup).KeyColumn("ItemId").Where("ItemType = '1419'");
    }

Answer 1

请提供更多信息（实体和地图）

我很确定x.AuditGroup.First().Created应该受到责备。我说这是因为我试着想到生成的SQL查询而我不能。

我建议为AuditGroup创建一个别名，然后按顺序排序。这非常粗略我会怎么做。

AuditGroup auditGroupAlias = null;

query.JoinAlias(p => p.AuditGroup, () => auditGroupAlias)
     .OrderBy(()=>auditGroupAlias.Created)

再次提供部分信息，我只能给出部分解决方案。

按nHibernate排序导致'Antlr.Runtime.NoViableAltException'

1 个答案: