NHibernate 一个表达式可以在 select 列表中指定当子查询没有用 EXISTS 引入时

Question

我有 class，其中包含属性，这是其他一些 class 的列表。我想将此 class 映射到可查询扩展名中的另一个 class。

AutoMappper.CreateMap<Department1, Department2>()
AutoMapper.CreateMap<Employee1, Employee2>()
var employee1 =_session.Query<Employee1>();
employee1.Project().To<Employee2>();

它给出错误 'Could not excecute query Only one expression can be specified in the select list when the subquery is not introduced with EXISTS.' select employee1_.Id 作为 col_0_0_, employee1_.Name 作为 col_1_0_, (select Department1_.Id, Department1_.Name 来自 Department.Department Department1_) as col_2_0_ from [Employee].[Employee] Employee1_

因为相同的解决方案适用于可枚举的情况 mapper.Map(员工1); 以下是 classes.

public class Employee1
{
    public int Id {get;set;}
    public string Name {get;set;}
    public List<Department1>{get;set;}
}

public class Department2
{
    public int Id {get;set;}
    public int Name {get;set;}
}

public class Employee2
{
    public int Id {get;set;}
    public string Name {get;set;}
    public List<Department2>{get;set;}
}

public class Department1
{
    public int Id {get;set;}
    public int Name {get;set;}
}

Answer 1

您需要使用 NHibernate 4，它对嵌套集合的投影能力有限。

NHibernate 一个表达式可以在 select 列表中指定当子查询没有用 EXISTS 引入时

NHibernate one expression can be specified in the select list when the subquery is not introduced with EXISTS

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