Specifies a shard key with the field(s) specified.
@example Specify the shard key.
class Person include Mongoid::Document field :first_name, :type => String field :last_name, :type => String shard_key :first_name, :last_name end
@since 2.0.0
# File lib/mongoid/sharding.rb, line 55 def shard_key(*names) self.shard_key_fields = names end