Allowing MongoAlchemy to connect to a Replica Set instance.

[tresbailey]

Uses the default pymongo connect method and keyword replicaSet. To use the replica set, its name must be passed into the config item, "MONGOALCHEMY_REPLICA_SET".

[fsouza]

Should the default value be None?

Thank you!

[tresbailey]

I got errors when passing in None to hit instances in a lower envirinment without replica sets. I will confirm the error and check on the pymongo documentation. Thanks for the quick response.

[fsouza]

Cool. No problem with the empty string, just checking :)

[tresbailey]

Confirmed that I receive an error when connecting with None as the default: TypeError: Wrong type for replicaSet, value must be an instance of basestring

In the pymongo docs, it looks like the replicaSet keyword requires a string value: http://api.mongodb.org/python/current/api/pymongo/connection.html

[fsouza]

Great, I will merge! :)