问题
I already have an established database connection. I need to list the names of the collections in the database. Is it possible?
回答1:
To show collections into database from mongo shell :
db.getCollectionNames()
So to show collection in mongoskin try that
var collections = db.collections();
collections.each(function(err, collection) {
    console.log(collection);
});
according to this link Mongoskin Tutorial
回答2:
db.collectionNames(function(err, collectionArrayResult) {
    //Now do something with collectionArrayResult
});
The result is an array of objects with a 'name' property, like this:
[
   { name: '<dbName>.<collectionName>' },
   ...
]
Careful though -  <dbName>.system.indexes will be returned too.
来源:https://stackoverflow.com/questions/21565191/is-there-a-way-to-list-collections-with-mongoskin