A class representing the BSON MinKey type. MinKey will always compare less than all other BSON types and values.
@example Sorting (assume @numbers is a collection):
>> @numbers.save({"n" => Mongo::MinKey.new}) >> @numbers.save({"n" => -1_000_000}) >> @numbers.save({"n" => 1_000_000}) >> @numbers.find.sort("n").to_a => [{"_id"=>4b5a050c238d3bace2000004, "n"=>#<Mongo::MinKey:0x1014ef410>}, {"_id"=>4b5a04e6238d3bace2000002, "n"=>-1_000_000}, {"_id"=>4b5a04ea238d3bace2000003, "n"=>1_000_000}, ]
# File lib/bson/types/min_max_keys.rb, line 52 def ==(obj) obj.class == MinKey end