def merge(self, mid):
"""
Retrieves a Topic by mid, if doesn't exist, merges it from Freebase
"""
# Strip the trailing slash
if mid.endswith("/"):
mid = mid.rstrip("/")
results = self.filter(mid=mid)
## If result fetched from the database
if len(results) == 1:
return results[0]
## If no result fetched from the database
if len(results) < 1:
result = topic(mid)
summary = summarize(result)
# Rename keys to fit the model
summary['title'] = summary.pop('name')
# Remove extra keys not required for model
del summary['links']
return self.create(**summary)
## If multiple results returned (shouldn't happen)
if len(results) > 1:
raise self.model.MultipleObjectsReturned()
raise ProgrammingError("Merge operation should return or raise model (exception)")
def retrieve(self, request, pk=None):
"""
Returns a topic detail from Freebase for a particular mid
"""
if pk is None:
raise Http404
if not pk.startswith("/"):
pk = "/" + pk
result = topic(pk)
return Response(summarize(result))