Pymongo Inserted Ids When BulkWriteError occurs

Question

I know that we can get inserted_ids of documents inserted by simply accessing pymongo.results.InsertManyResult returned by insert_many operation

>>> o = db.collection.insert_many([{"hash": "abcde"}, {"hash": "efgh"}], ordered=False)
>>> o.inserted_ids
   [ObjectId('5f5280fdca7d7735e9dcbb85'), ObjectId('5f5280fdca7d7735e9dcbb86')]

But Let's consider we have a unique index field (let's say "hash") on above collection and now I insert two more records with one having duplicate unique field that is already inserted which would lead to an expected Exception BulkWriteError

>>> try:
        o = db.collection.insert_many([{"hash": "efgh"}, {"hash": "ijk"}], ordered=False)
    except BulkWriteError as e:
        print(e.details)
    
    {'nInserted': 1,
     'nMatched': 0,
     'nModified': 0,
     'nRemoved': 0,
     'nUpserted': 0,
     'upserted': [],
     'writeConcernErrors': [],
     'writeErrors': [{'code': 11000,
                     'errmsg': 'E11000 duplicate key error collection: '
                               'db.collection index: hash_1 dup key: { : "efgh" }',
                     'index': 0,
                     'op': {'_id': ObjectId('5f52814381c45515348fd36b'),
                            'hash': 'efgh'}}]}

But my question is can we get inserted ids of documents that were successfully inserted (i.e shown by 'nInserted') ?

Does this answer your question? Pymongo get inserted id's even with duplicate key error — D. SM

Belly Buster Belly Buster · Accepted Answer · 2020-09-04T19:52:09

No you can't. See my answer to Pymongo get inserted id's even with duplicate key error which is a similar type of question.

Pymongo Inserted Ids When BulkWriteError occurs

1 Answers