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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 = studentsRemote.insert({'price': price})
In the actual python script, that studentId prints as a string, but in the javascript Meteor application I'm using this data in, it shows up everywhere as ObjectId(...).
I want to configure pymongo to generate the _id as a string and not bother with ObjectId's
Any objects I create with the Meteor specification will use the string format, and not the ObjectId format. I don't want to have mixing of id types in my application, because it's causing me interoperability headaches.
I'm aware I can create ObjectId's from Meteor but frankly I'd much rather use the string format. It's the Meteor default, it's much simpler, and I can't find any good reason to use ObjectId's in my particular app.
The valueOf() mongo function or something similar could parse the _id and be used to update the document once it's in the database, but it would be nice to have something more direct.
632
Yes, you can use a string as your _id.
The _id field is immutable—that is, once a document exists in your MongoDB system, it has, by definition, been assigned an _id, and you cannot change or update its primary key. That said, _id can be overridden when you insert new documents, but by default it will be populated with an ObjectID.
You cannot update it. You'll have to save the document using a new _id , and then remove the old document.
By default, MongoDB generates a unique ObjectID identifier that is assigned to the _id field in a new document before writing that document to the database. In many cases the default unique identifiers assigned by MongoDB will meet application requirements.
in .py files:
from bson.objectid import ObjectId
......
kvdict['_id'] = str(ObjectId())
......
mongoCollection.insert(kvdict)
it's ok!
54
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