mongoengine.errors.ValidationError: Integer value is too small - mongodb

Question

I have a simple User schema in mongoDB for my Flask server. I am using mongoengine to work with the database. The schema is as follows:
class User(Document):
username = StringField(unique=True, requireed=True)
email = EmailField(unique=True)
password = StringField(required=True)
creditCount = IntField(default=0, min_value=0, max_value=None)
date_created = DateTimeField(default=datetime.utcnow)
def json(self):
user_dict = {
"username": self.username,
"email": self.email,
"creditCount": self.creditCount,
}
return json.dumps(user_dict)
meta = {
"indexes": ["username"], # index based on username
"ordering": ["-date_created"], # order in decending order
}
When I try to decrement the creditCount of a user, I get an error saying the integer value is too small. I have confirmed that the user has 10 credits and they only need to have 1 credit for the code to work. The code I am using is as follows:
try:
user = User.objects(username=request.args["username"]).get()
print(user.creditCount)
except DoesNotExist:
return "That user does not exist"
if user.creditCount == 0:
return "You do not have enough credits to search for a doggo."
print("credits: " + str(user.creditCount)) #This is where I'm confirming the user has enough credits through the terminal
if os.path.isfile(filePath):
user.update(dec__creditCount=1)
return send_file(filePath)
I'm not entirely sure what the issue could be since I am validating that the user has more than one credit and also printing their credits to the terminal and they are over one. I am also able to increment the credit count with inc__creditCount=1.
Thanks!
Brad

Answer 1

There is an open ticket about this bug, see
https://github.com/MongoEngine/mongoengine/issues/2339