PyMongo $inc having issues

Question

When trying to use $inc I get a Syntax error stating that $set is wrong. My query is as follow:

mongo_db.campaign.update({\'_id\': str(campaign_id)}, { $inc:         


        

Answer 1

$inc isn't a valid Python identifier. You should pass it as a string, like everything else:

mongo_db.campaign.update({'_id': str(campaign_id)}, {'$inc': {'item': 1}})

The MongoDB docs you linked are the general MongoDB documentation, not PyMongo-specific; you can't copy/paste them literally and expect things to work.

Answer 2

pymongo == 2.7 
campaign_id = bson.ObjectId(campaign_id)
mongo_db.campaign.update({'_id': campaign_id}, {'$inc': {'item': 1}})