ruby on rails - Is there a guarantee that ActiveRecord returns objects ordered by ID? -

ruby on rails - Is there a guarantee that ActiveRecord returns objects ordered by ID? -

my project hosted on heroku. surprised when room.all method returned objects first object id 2 , second object id 1. thought there sort of guarantee objects returned ordered id. should phone call room.all.order(:id) instead of regular all method?

irb(main):002:0> room.all => #<activerecord::relation [ #<room id: 2, color: "rgb(83, 180, 83)", status: "status #2", created_at: "2014-10-11 14:14:02", updated_at: "2014-10-11 14:18:19">, #<room id: 1, color: "rgb(0, 96, 255)", status: "status #3", created_at: "2014-10-11 14:14:02", updated_at: "2014-10-11 14:18:30"> ]>

nope. room.all ends sql select * rooms; - no order there. in event, order of records determined database (for instance, in postgresql, notice returns me updated records last).

if want ensure there's order when phone call .all, add together default scope adds it:

default_scope order('rooms.id asc')

ruby-on-rails postgresql activerecord ruby-on-rails-4 heroku