:validate => true on a belongs_to tells Rails to validate the owner record when the owner record is being saved in order to get a foreign key value for the association. This doesn't seem to make sense, because you cannot save an association without saving first the owning record, so let's say:
class Address < ActiveRecord::Base belongs_to :user, :validate => true end
class User < ActiveRecord::BAse has_many :addresses end
u = User.new a = Address.new u.addresses << a
u.save #I guess this is the only time when the belongs_to :validate => true will be fired, that is, when we are saving the owner record. But this doesn't make sense because the owner record's own validation would be triggered anyway when we do this. So I still don't understand the purpose of :validate => true on a belongs_to relation.
thanks for response
