Question

我遇到异常NHibernate.QueryException：无法解析属性：InsuredId 。我是NHibernate的新手，我无法理解。

定义属性

public virtual int InsuredId { get; set; }
public virtual string Gender { get; set; }
public virtual DateTime DateOfBirth { get; set; }
public virtual string SrId { get; set; }
public virtual string SchoolId { get; set; }
public virtual string Ssn { get; set; }
public virtual DateTime GradDate { get; set; }

将数据映射到属性

public InsuredMap()
{
     ReadOnly();

     Table("Insured");
     Id(x => x.Id, "InsuredId");
     Map(x => x.Gender, "SexCd");
     Map(x => x.DateOfBirth, "BirthDt");
     Map(x => x.SrId, "SIDIdNum");
     Map(x => x.SchoolId, "SchoolIdTxt");
     Map(x => x.Ssn, "SocSecNumTxt");
     Map(x => x.GradDate, "GradMthYrNum");
}

获取所有值的功能

public Entities.Insured GetByInsuredId(int insuredId)
{
    var query = Session.QueryOver<Entities.Insured>()
        .Where(x => x.InsuredId == insuredId)
        .Cacheable()
        .CacheRegion(Constants.EntityCacheRegion);

    return query.SingleOrDefault();
}

测试数据的单元测试

[Test]
public void InsuredMapTest()
{
    var insured = repository.GetByInsuredId(714619800);
    Assert.That(insured.Gender, Is.EqualTo("F"));
}

Answer 1

让我更加准确，并延伸安德鲁·惠特克的评论。

在您所说的映射中：

Id(x => x.Id, "InsuredId");

哪些是信息：我的实体/班级Insured有

Id(            // an identificator, the key
x => x.Id      // represented by the property **Id** (here is the issue)
, "InsuredId") // its DB representation is the column "InsuredId"

换句话说，C＃属性

public virtual int InsuredId { get; set; }

使用上述语句

不映射，因此无法用于查询

我们可以在查询中做些什么来使其正常工作

var query = Session.QueryOver<Entities.Insured>()
    //.Where(x => x.InsuredId == insuredId)
    .Where(x => x.Id == insuredId)
    ...

并且无法解析属性：InsuredId 异常将消失，因为我们正在使用映射属性Id

NHibernate无法解析属性

1 个答案: