NHibernate的（参考）一对多

Question

我：

所以，当我这样做：

var x = new DailyWorkTime() 
{ 
    Employee = new Employee() 
     { 
      Id = IdFromAnExistingEmployee, 
     }; 

} 

，当我打电话SaveOrUpdate我收到以下错误：

NHibernate.TransientObjectException: object references an unsaved transient instance - save the transient instance before flushing or set cascade action for the property to something that would make it autosave. Type: ProjectTracker.Domain.Employees.Employee, Entity: ProjectTracker.Domain.Employees.Employee bei NHibernate.Engine.ForeignKeys.GetEntityIdentifierIfNotUnsaved(String entityName, Object entity, ISessionImplementor session)

任何想法？

Answer 1

如果您尝试调用DailyWorkTime实例的保存，则需要将Employee属性标记为级联。

References(x => x.Employee).Cascade.All(); 

或者您从映射一对多保存DailyWorkTime

var normalHours = new DailyWorkTime(); 
normalHours.Employee = new Employee() { Id = 1234}; 
session.SaveOrUpdate(normalHours.Employee); 
session.SaveOrUpdate(normalHours); 

Answer 2

你在Employee表，然后才能保存Employee对象。将映射设置为反转。这将意味着孩子控制保存。