[Fixed]-Mongoengine: ConnectionError: You have not defined a default connection

by

0👍

✅

To use django with MongoDB do not use the django package available on https://www.djangoproject.com and install other packages like mongoengine, if follow this process you will find lot of difficulties.

Rather you need to use the no@rel version of django that has been forked from djangoproject and added MongoDB support and I am sure it will make setup process and development process lot easier.

Follow this link to install and set up the django with MongoDB.
http://django-mongodb-engine.readthedocs.org/en/latest/topics/setup.html

One more thing you may find the error below, while setting up django.

“*Error on Django-nonrel and MongoDB: AutoField (default primary key) values must be strings representing an ObjectId on MongoDB (got u’1′ instead). Please make sure your SITE_ID contains a valid ObjectId string.*”

Follow this link to fix.

https://gist.github.com/ielshareef/2986459

Please let me know if you need any more help on this.

👤Shanki

21👍

I have not tested this in-depth, but so far it worked for me:

mongoengine.connect('yourdb', alias='default')

👤biodiv

7👍

In your settings.py file replace:

mongoengine.connect(_MONGODB_NAME, 'localhost:27017')

with the below code (notice the added ‘host=‘):

mongoengine.connect(_MONGODB_NAME, host='localhost:27017')
👤NiKS001

0👍

You need to specify the mongodb database name and not _MONGODB_NAME. You also need to comment the DATABASE settings in the django.

#Database connection 
class ConnectionError(Exception):
    pass

from mongoengine import connect
try:
    connected = connect("blogDatabase", "localhost")
    if connected:
        print("Mongoengine is connected")
except ConnectionError:
    raise ConnectionError
👤Brian

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