Insert creates the _id field, always

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    • Type: Bug
    • Resolution: Done
    • Priority: Major - P3
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    • Affects Version/s: None
    • Component/s: Storage
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    • Minor Change
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      Not sure how to insert a document with no _id in the shell, so this example uses PyMongo. In 2.4.x, if I create a collection with autoIndexId set to false I can insert a document without an _id field and the _id is not automatically created:

      >>> c = pymongo.MongoClient()
>>> db = c.test
>>> coll = db.create_collection("test", capped=True, autoIndexId=False, size=1000)
>>> coll.insert({'a': 'a'}, manipulate=False)
>>> coll.find_one()
{u'a': u'a'}
>>> c.server_info()['version']
u'2.4.8'

      In 2.5.5-pre- the _id field is created, regardless of the autoIndexId setting:

      >>> c = pymongo.MongoClient()
>>> db = c.test
>>> coll = db.create_collection("test", capped=True, autoIndexId=False, size=1000)
>>> coll.insert({'a': 'a'}, manipulate=False)
>>> coll.find_one()
{u'a': u'a', u'_id': ObjectId('52d0831332e6147c55bbd61b')}
>>> c.server_info()['version']
u'2.5.5-pre-'

              Assignee:
              Eliot Horowitz (Inactive)
              Reporter:
              Bernie Hackett
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                Created:
                Updated:
                Resolved: