MongoDB and Rails: How to create Index

Question

I was looking for a way in the initializer mongo_config.rb to create an index for locations. In other words, I want to be able to do

db.map.ensureIndex({"gps" : "2d"})

in the initializer and in ruby. How do I do this?

Answer 1

Updated example: map.indexes.create_one({some_key: 1}, {unique: true}) (also assuming map is a Mongo::Collection)

Answer 2

See MongoDB Ruby Documentation. You want ensure_index, for example map.ensure_index([["gps", Mongo::GEO2D]]) will do what you want, assuming map is a Mongo::Collection.