def fulltext_index
    attributes.except(:_rev, :_type, :doc_type).values.map{|e| e.class==String ? e.to_s : ""}.join(" ").strip + " " + sequence.to_s
end

index({ fulltext_index: "text"})

client = Mongo::Client.new([ '127.0.0.1:27017' ], :database => 'music')
client[:bands].indexes.create_one( { "$**": "text" } )

client = Mongoid.default_client[Model.collection_name]
client.indexes.create_one( { "$**" => "text" } )