Does mongoose.mongo.MongoClient.connect() works without mongo shell?

Question

I am connecting to the mongo servers that are not localhost. I am using mongoose. And in some moment I needed to connect with mongo native driver so I am doing it like:

mongoose.mongo.MongoClient.connect(uri, function (err, conn) {});

but conn object is null.

Recently I changed servers structure, and now all mongo databases are remote, and on my new node machines I do not have mongo shell installed at all... In first all was working fine and connection uri was:

mongodb://x.x.x.x:27017/database,mongodb://y.y.y.y,mongodb://z.z.z.z

where x.x.x.x:27017 was primary, after some time due the break of the initial primary, new primary has been elected, and now I am starting with the same uri, but connection object is null and I do not know why...

is there somebody that had similar problem? or maybe solution or idea....

Answer 1

Connection uri was wrong:

instead:

mongodb://x.x.x.x:27017/database,mongodb://y.y.y.y,mongodb://z.z.z.z,{options}

for native driver MongoClient I should used:

mongodb://x.x.x.x:27017,y.y.y.y:27017,z.z.z.z:27017/database?opt1=o1&opt2=o2

this is where I was found this solution: MongoClient.connect