def connectUserToThing(self, thing, increment = 1):
"""
crea un legame tra user e thing
o incrementa il legame se esiste
"""
query = UserLinking.all()
query.filter('user ='******'thing =', thing)
linking = query.get()
if linking:
linking.count += increment
else:
linking = UserLinking(user = self.user, thing = thing, count = increment)
if linking.count >= UserLinking.kActiveLinkingMinimumCount:
linking.is_active = True
linking.put()
return linking
