Configure pymongo to use string _id instead of ObjectId

Question

I\'m using pymongo to seed a database with old information from a different system, and I have a lot of queries like this:

studentId = studentsR         


        

Answer 1

It ended up being fairly simple.

The son_manipulator module can be used to change incoming documents to a different form. Most of the time this is used to encode custom objects, but it worked for this as well.

With the manipulator in place, it was just a matter of calling the str() function on the ObjectId to make the transformation.

from pymongo.son_manipulator import SONManipulator
class ObjectIdManipulator(SONManipulator):
    def transform_incoming(self, son, collection):
        son[u'_id'] = str(son[u'_id'])      
        return son

db.add_son_manipulator(ObjectIdManipulator())

Answer 2

in .py files:

from bson.objectid import ObjectId
......
kvdict['_id'] = str(ObjectId())
......
mongoCollection.insert(kvdict)

it's ok!