txmongo list of collections not returned

[ashishRay12]

txmongo dosen't return list of all collections.Inserts and deletes works just fine.Below is the code that is being used.

from txmongo.connection import ConnectionPool
from twisted.internet import defer, reactor
import time


@defer.inlineCallbacks
def mongoHost():
    mongodb_uri = "mongodb://%s:%s" % ('127.0.0.1', '27017')
    mongo = yield ConnectionPool(mongodb_uri)
    defer.returnValue(mongo)


@defer.inlineCallbacks
def query_to_db():
    mongo = yield mongoHost()
    db = mongo['clients']
    coll = yield db.collection_names() # <------------------dosen't works!
    # coll = yield db.facebook.find({})  <------------------works !
    print coll

if __name__ == '__main__':
    reactor.callLater(1, query_to_db)
    reactor.run()

[IlyaSkriblovsky]

Oops, you are right, it seems to be broken on MongoDB 3.x

[IlyaSkriblovsky]

As a workaround you can probably try yield db.command("listCollections")

[ashishRay12]

@IlyaSkriblovsky thanks :)

[psi29a]

Nice find, time for another component test. :)

[anekix]

@IlyaSkriblovsky @psi29a it works in MongoDB 3.0.12. verified

[anekix]

@ashishRay12 what version are you using?

[ashishRay12]

@anekix i am using MongoDB 3.2.14.

[IlyaSkriblovsky]

collection_names() is using system.namespaces special collection that was deprecated in 3.0 and probably removed in 3.2: https://docs.mongodb.com/manual/reference/system-collections/#.system.namespaces