Unable to deserialize PyMongo ObjectId from JSON

Question

I\'m seemingly unable to deserialize my MongoDB JSON document with the BSON json_util.

The json.loads function is choking on the ObjectId() string. I h

Answer 1

There are two problems here:

1. The string you're attempting to JSON-decode is not JSON, it's the string representation of a Python dictionary. In particular, the problem is that u'_id' is not a valid JSON key (JSON keys are quoted strings; the "u" here indicates a Python unicode string, which is meaningless in JSON)

2. json_util.object_hook doesn't make ObjectId available to JSON; the json module will decode the JSON, and then call the object_hook callback with each decoded object. json_util.object_hook will look for certain patterns as defined in the strict mode of MongoDB Extended JSON.

See @jdi's answer for examples of how to properly use json_util.