ORM 怎么实现一对多, 多对多, 模型套模型这种case呢? about wcdb HOT 7 CLOSED

@interface Teacher : NSObject

@property (nonatomic, copy) NSString *tid;
@property (nonatomic, copy) NSString *name;
@property (nonatomic, strong) NSArray<Student *> *students;

@end


@interface Student : NSObject

@property (nonatomic, copy) NSString *sid;
@property (nonatomic, copy) NSString *name;
@property (nonatomic, strong) NSArray<Teacher *> *teachers;

@end

[database runTransaction:^BOOL{
    Student* student = [[Student alloc] init] ;
    student.name = @"newStudent";
    Teacher* teacher = [[Teacher alloc] init] ;
    teacher.name = @"newTeacher";
    [teacher.students addObject:student]
    [student.teachers addObject:teacher];
    return [database insertOrReplaceObject:student into:@"students"]
            &&[database insertOrReplaceObject:teacher into:@"teachers"];
}];