实现 Nhibernate 一对多映射
我有一个班级学校和另一个班级老师。现在每所学校可以包含 m 名教师，并且一名教师可能属于多个学校。但在教师类中，我不想要一个属性来告诉我教师属于哪些学校。
因此，
public class School
{
public virtual int Id {get;set;}
public virtual string Name {get;set;}
public virtual IList<Teacher> Teachers {get;set;}
public School()
{
Teachers=new List();
}
}
相同的映射是
public class SchoolMap:ClassMap<School>
{
public SchoolMap()
{
Id(x=>x.Id);
Map(x=>x.Name);
HasMany(x=>x.Teachers);
}
}
，教师被定义为，
public class Teacher
{
public virtual int Id {get;set;}
public virtual int Name {get;set;}
}
并且定义了预期的简单映射。
现在我希望正确连接这些表，以便当我创建一个 School 对象，然后向其中添加教师并保存它时，我希望将其存储在映射表中，该表的列应为以下 SchoolId、TeacherId。
现在，我如何在映射中使用此表，以便当我保存 School 对象时，我的教师也存储在数据库中，并且在检索 School 对象时，我也检索教师。
任何答案将不胜感激。
I have a class School and another class Teachers. now every school can contain m Teachers and one Teacher may be part of more than one school. But in the Teachers class I dont want a property that tells me which Schools a teacher is part of.
Thus,
public class School
{
public virtual int Id {get;set;}
public virtual string Name {get;set;}
public virtual IList<Teacher> Teachers {get;set;}
public School()
{
Teachers=new List();
}
}
And the mapping for the same is
public class SchoolMap:ClassMap<School>
{
public SchoolMap()
{
Id(x=>x.Id);
Map(x=>x.Name);
HasMany(x=>x.Teachers);
}
}
and Teacher is defined as
public class Teacher
{
public virtual int Id {get;set;}
public virtual int Name {get;set;}
}
and the expected simple mapping is defined.
Now I wish to join these tables right so that when I create a School object and then add Teachers to it and save it I want it to be stored in a mapping table the columns of which should be the following SchoolId,TeacherId.
Now how do i use this table in my mapping so that when I save the School object my teachers are also stored in the db and on retrieving the School object I retrieve the Teachers too.
Any answer would be appreciated.
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尝试这个：
HasMany(x => x.Teachers).Inverse().Cascade.All();
Try this:
HasMany(x => x.Teachers).Inverse().Cascade.All();