Misleading documentation around indexing for 2d geospatial index

[vinayvinay]

This line mandates that the field used for 2d geospatial indexing must be an Array. mongodb doesn't mandate anything like that, instead it is open to an Array or embedded document, but only mandates the correct order [lon, lat].

i ran benchmarks against indexes created as both Array and embedded document, doesn't make any difference. then why is mongoid mandating the usage of Array ?

please make it such that it mirrors mongodb requirements, or if there is a good reason for mongoid to mandate it, then make it clear here.