compatibility with pymongo whoes version is larger than 3.0

[normal-cock]

Mongoengine seems not compatible with pymongo whoes version is larger than 3.0.
When I executed the follow code:

connect( 'website', alias=DEFAULT_CONNECTION_NAME, host='mongodb://username:password@localhost:27017,localhost:27117,localhost:27217/website?replicaSet=test')

I got the following error:

ConnectionError: Cannot connect to database default :
Unknown option hosts_or_uri

Then I tried to find out what happened and found that after pymongo 3.0, MongoReplicaSetClient is just a alias of MongoClient and doesn't support hosts_or_uri parameter.

[MRigal]

Yes, you need to use the current master with PyMongo 3+. It is already fixed. We are waiting to merge a couple more issues to release a new version 0.10

@MRigal It doen's seem to be fixed on v0.10. I'm getting the same error when connecting to the server. I'm using mongoengine 0.10.0 and pymongo 3.0.2
mongoengine tries to pass hosts_or_uri to MongoClient, which doesn't have that parameter in __init__

[MRigal]

immm that's a pity. Well in the meanwhile, please use a different connection method. We'll have to work on that point for the next release. Our hole method for connecting and managing connections and clients is quite broken, also due to the significant changes made on PyMongo in version 3. If you feel like submitting a PR with a precise test and eventually a fix, feel very welcome to do so!

[samuelclay]

What different connection method would you recommend if we are running a replica set.

[alfredn]

I'd like to know this as well; this is unfortunately an app breaking bug for us since we're using a replicaSet.

[normal-cock]

I fixed it just by upgrade PyMongo from 3+ to 2.7