多对一在Hibernate中，获得列式

Question

In Hibernate when I got simple Pojo, for example User:

private class User{
   private String name;
}

When I want to get property of the "name", a simply use:

sessionFactory.getClassMetadata(User.class).getPropertyType("name")

But when I add a class Grou to my User:

private class User{
   private String name;
   private Group group;
}

My previous code :

  sessionFactory.getClassMetadata(User.class).getPropertyType("group.name")

doesn't work. Any way to solve it?

Answer 1

Split your query group.name into the corresponding parts group and name .

Class<?> currentClass = User.class;
for(String field: "group.name".split("\\Q.\\E")) {
    currentClass = sessionFactory.getClassMetadata(currentClass).getPropertyType(field);
}

Answer 2

for group.name to work , you have to specify the mapping for Group class also. If you have already specified a mapping and still its not working then please share the mapping file here. Issue might be in the mapping only.