I have flask-mongoengine application and I have a seriuos problem when I want to iterate over a mongoengine queryset object. here is the code for my mongoengine object:
mongo_models:
class Candid(Document):
candid_intent_id = StringField()
id_list = ListField(StringField())
custom_code = StringField()
is_approved = BooleanField()
def to_json(self, *args, **kwargs):
return {'candid_intent_id': self.candid_intent_id,
'id_list': self.id_list,
'custom_code': self.custom_code,
'is_approved': self.is_approved}
and I want to iterate over them like this:
candid_list:
custom_code = 'Bob'
query_set = Candid.objects(is_denied=False, custom_code=current_request.custom_code)
try:
for candid in query_set:
suggested_intent_list.append(candid.to_json())
if not candid.is_approved:
suggested_intent_count += 1
except StopIteration:
return 'StopIteration error'
now here is the catch: when run my code (with python 3.5.2) using a local mongo server it works fine (whether Candid collection is empty or not), but I deploy the code on a dockerized server (with python 3.7.0) I get the following Runtime Error:
File "/controller.py", line 25, in <candid_list>
for candid in query_set:
RuntimeError: generator raised StopIteration
btw, mongoengine version is the same for local and docker server run: mongoengine==0.15.0.
please tell me if I have to provide more information, and any help would be greatly appriciated.
The problem is that raising StopIteration inside generators became deprecated in python 3.5, raised a warning in python 3.6 and now raises an error in python 3.7. It sounds like this package is not ready for python 3.7 yet.