geo_near breaks on ruby 1.8.7

[schnittchen]

with the error

Mongo::MongoArgumentError: DB#command requires an OrderedHash when hash contains multiple keys

[mikebevz]

Same for me.

[bkimble]

Because you need to give it an OrderedHash:

selector = BSON::OrderedHash.new
selector['geoNear'] = 'stores'
selector['near'] = [123,456]
selector['num'] = 3
Store.database.command(selector)