Missing index on `key` property on Mongodb

[gkampitakis]

In my company, we are using this library. I am guessing it's no longer maintained but I thought it would be worth creating an issue, in case someone else comes across with the same issue.

This library creates an index for querying the collection

node_acl/lib/mongodb-backend.js

Line 138 in 1f064cc

collection.ensureIndex({_bucketname: 1, key: 1}, function(err){

The problem appears when setting the useSingle to false, as we are querying the collections using the {key:<value>}

node_acl/lib/mongodb-backend.js

Line 116 in 1f064cc

var updateParams = (self.useSingle? {_bucketname: bucket, key:key} : {key:key});

meaning we are not using the created index resulting to slow queries not taking advantage of the index.