One-To-Many Example in NDB

Question

I am trying to create ndb.Model class like Students and subjects

class Subject(ndb.Model):
     name = ndb.StringProperty()

class Student(ndb.Model):
    na         


        

Answer 1

Definition:

class Subject(ndb.Model):
     name = ndb.StringProperty()

class Student(ndb.Model):
    name = ndb.StringProperty()
    subject = ndb.KeyProperty(kind=Subject,repeated=True)

Usage:

subject1 = Subject()
subject1.put()
subject2 = Subject()
subject2.put()
student = Student()
student.subject.append(subject1.key)
student.subject.append(subject2.key)
student.put()