def times(self, request):
"""Get times an object has changed.
The object's created_at time will be added if not present.
"""
# Validate input
times = TimesChangedSerializer(data=request.data)
if not times.is_valid():
raise ValidationError(times.errors)
vd = times.validated_data
# Find object by type and identity
query = Query(vd.get('model')) \
.identity(vd.get('identity')) \
.time(vd.get('time'))
records = query.fetch()
# Raise 404 if not found
if not records:
raise Http404()
created_at = records[0][vd.get('model')]['created_at']
# Build query to get times
logger.debug("GETTING TIMES")
times = self._times(vd['model'], vd['identity'])
if created_at not in times:
times.append(created_at)
results = GenericSerializer({'data': vd, 'times': times})
return Response(results.data)
def _exists(self, model, identity, time):
"""Check that an instance of a model exists at a time.
:param model: Name of the model
:type model: str
:param identity: Identity of the instance of the model.
:type identity: str
:param time: Time to verify in milliseconds since epoch
:type type: int
"""
query = Query(model).identity(identity).time(time)
records = query.fetch()
logger.debug("Found {} matches for time {}".format(len(records), time))
return len(records) > 0