Google app engine simple query

from google.appengine.ext import db
from google.appengine.api import users

class FirstModel(db.Model):
prop = db.IntegerProperty()

class SecondModel(db.Model):
prop2 = db.IntegerProperty()
reference = db.ReferenceProperty(FirstModel, collection_name = "relation")


// Put data to datastore
firstmodel = FirstModel(prop = 06)
firstmodel.put()
secondmodel = SecondModel(prop2 = 1, reference = firstmodel)
secondmodel.put()
secondmodel = SecondModel(prop2 = 2, reference = firstmodel)
secondmodel.put()


Get all entity by using collection_name

query = firstmodel.relation
query = query.fetch(30)
print query



The Result
2 entity are displayed.
[<__main__.SecondModel object at 0x020736B0>, <__main__.SecondModel object at 0x02073790>]