Question

您可以在TPC映射中为复合零件设置默认值吗？我有一个像这样的实体集类：

public class Employee()
{
    public EmployeeIdentity Id;       
    public double MonthlySalaryBase;
}

public class EmployeeIdentity()
{
    public int DepartmentId;
    public int DepartmentEmployeeId;
} 

public class SalesEmployee(): Employee
{
   public double ComissionRate;
}

public class ProgrammerEmployee(): Employee
{
   public int WeeklyExtraHoursAllowed;
}

我用Fluent NHibernate映射了这个：

public class EmployeeMap: ClassMap<Employee>
{
   public void Employee()
   {
       Table("employee");
        CompositeId().ComponentCompositeIdentifier<EmployeeIdentity)(x => x.Id).
            KeyProperty(x => x.Id.DepartmentId, "id_department").
            KeyProperty(x => x.Id.DepartmentEmployeeId, "id_department_employee_id");
        Map(x => x.MonthlySalaryBase);
   }
}

public class SalesEmployeeMap: SubclassMap<SalesEmployee>
{
   Table("sales_employee");
   KeyColumn("id_department");
   KeyColumn("id_department_employee_id");
   Map(x => x.ComissionRate)
}

public class ProgrammerEmployeeMap: SubclassMap<ProgrammerEmployee>
{
   Table("programmer_employee");
   KeyColumn("id_department");
   KeyColumn("id_department_employee_id");
   Map(x => x.WeeklyExtraHoursAllowed)
}

有了这个，我必须在程序员和销售表中都有一个id_department列，但是这个列总是相同的（所有销售员工都有相同的部门ID）。我喜欢在子类映射中使用常量替换id_department的KeyColumn，从而避免这两个表中的id_department列。这可能吗？

Answer 1

似乎Hibernate（Java）支持此功能，但NHibernate不支持。 fluent nhibernate foreign key with 2 columns mapping

每个类映射的复合表，列默认值

1 个答案: