def _createSessionObject(self, request, websafeConferenceKey):
"""Create Session object and return it."""
# preload necessary data items
# check user login
user = endpoints.get_current_user()
if not user:
raise endpoints.UnauthorizedException('Authorization required')
user_id = getUserId(user)
# check conference exists
c_key = None
try:
c_key = ndb.Key(urlsafe=websafeConferenceKey)
conf = c_key.get()
except Exception:
conf = None
if not conf:
raise endpoints.NotFoundException(
'No conference found with key: %s' % websafeConferenceKey)
# check user is organizer of conference
if conf.organizerUserId != user_id:
raise endpoints.UnauthorizedException(
'Only conference organizer can add '
'sessions to this conference')
# check session name and speaker email both are included in the form
if not request.name:
raise endpoints.BadRequestException(
"Session 'name' field required")
if not request.speakerEmail:
raise endpoints.BadRequestException("Speaker email field required")
# check that there is no other session with the same name
sessions = Session.query(Session.name == request.name).count()
if sessions:
raise endpoints.BadRequestException("There is already a session named %s" % request.name)
# retrieve the speaker using the provided speaker email. If not exists,
# create a new speaker with the provided name and email
speaker_key = ndb.Key(Speaker, request.speakerEmail)
speaker = speaker_key.get()
if not speaker:
# there is no speaker, try to create it
# the speaker name is now required
if not request.speakerName:
raise endpoints.BadRequestException(
"Speaker name field required")
# create the speaker entity
speaker = Speaker()
speaker.name = request.speakerName
speaker.email = request.speakerEmail
speaker.key = speaker_key
speaker.put()
# copy request values to to a new dictionary, and remove
# unnecessary ones
data = {field.name: getattr(request, field.name) for field in
request.all_fields()}
data['speakerId'] = speaker.email
# delete extra fields from data
del data['speakerName']
del data['speakerEmail']
del data['websafeConferenceKey']
# add default values for missing fields
# (both data model & outbound Message)
for df in SESSION_DEFAULTS:
if data[df] in (None, []):
data[df] = SESSION_DEFAULTS[df]
setattr(request, df, SESSION_DEFAULTS[df])
# properly parse dates and times
if data['date']:
data['date'] = datetime.strptime(data['date'][:10],
"%Y-%m-%d").date()
data['startTime'] = datetime.strptime(data['startTime'],
"%H:%M").time()
# generate a session key, using conference key as parent
session_id = Session.allocate_ids(size=1, parent=c_key)[0]
session_key = ndb.Key(Session, session_id, parent=c_key)
data['key'] = session_key
# create the session entity and store it in the Datastore
session = Session(**data)
session.put()
return session
