pymongo not able to retrieve files

Question

I am playing around with mongodb (GridFS) to store files (zip) and try to retrieve them using python`s "pymongo" but its not working as expected i am not able to understand how to retrieve the file(s) i have addedd ...

Below is the code i ran from IDLE ( Python 3.4.1 )

>>> db = Connection(port=31000, host="localhost").fs >>> db.name 'fs' >>> db.validate_collection <bound method Database.validate_collection of Database(Connection('localhost', 31000), 'fs')> >>> blob_store = gridfs.GridFS(db, collection='bstore') >>> local_db = dict() >>> k = r'd:\test\my-scripts.zip' >>> local_db[k] = blob_store.put(open(k, 'rb')) [** File is saved, i checked using robomongo **] >>> blob_store.exists(filename=k) False >>> blob_store.exists("53da7cb1b3b44b13e0e27721") False >>> local_db {'d:\\test\\my-scripts.zip': ObjectId('53da7cb1b3b44b13e0e27721')} >>> blob_store.list() [] >>> b = gridfs.GridFS(db, collection='bstore.files') >>> b.list() [] >>> x = blob_store.get(Objectid("53da7cb1b3b44b13e0e27721")) Traceback (most recent call last): File "<pyshell#20>", line 1, in <module> x = blob_store.get(Objectid("53da7cb1b3b44b13e0e27721")) NameError: name 'Objectid' is not defined >>> local_db {'d:\\test\\my-scripts.zip': ObjectId('53da7fd0b3b44b13e0e2772a')} >>> blob_store.find() <gridfs.grid_file.GridOutCursor object at 0x0000000003DC1828> >>> a = blob_store.find(ObjectId("53da7fd0b3b44b13e0e2772a")) Traceback (most recent call last): File "<pyshell#29>", line 1, in <module> a = blob_store.find(ObjectId("53da7fd0b3b44b13e0e2772a")) NameError: name 'ObjectId' is not defined

Now i am not sure how to retrieve the file from mongo? am i missing something obvious?

Thanks

A. Jesse Jiryu Davis · Accepted Answer · 2014-08-26 16:12:39Z

30

You need to import the ObjectId symbol:

from bson import ObjectId

Then your code should work.

answered Aug 26, 2014 at 16:12

A. Jesse Jiryu Davis

24.1k5 gold badges60 silver badges72 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

David Okwii Over a year ago

Thanks this works but I wonder why I wasn't included in the library all together.

Sanskar Agarwal · Accepted Answer · 2023-01-20 10:18:50Z

You can import ObjectId using the following:

from bson.objectid import ObjectId

Alternatively you can also do the following:

from bson import ObjectId

If you are having trouble searching for the automatically created ObjectId. You can yourself write a new document(record/item) by providing value to "_id" key in insert_one or insert_many operation:

document = {"_id": "1001", "Name": "Mercedes", "Price": 4910000, "Track": "Motorsport"} collection.insert_one(document)

or you can also create a document by giving your own Object Id to the document as follows:

document = {"_id": ObjectId('63ca647ccc17147000b7a312'), "Name": "Mercedes", "Price": 4910000, "Track": "Motorsport"} collection.insert_one(document)

However, ObjectId() can only accept limited arguments which can be found on the MongoDb documentation

Collectives™ on Stack Overflow

pymongo not able to retrieve files

2 Answers 2

1 Comment

Comments

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

1 Comment

Comments

Related