diff options
Diffstat (limited to 'activerecord/lib/active_record/callbacks.rb')
| -rw-r--r-- | activerecord/lib/active_record/callbacks.rb | 55 |
1 files changed, 52 insertions, 3 deletions
diff --git a/activerecord/lib/active_record/callbacks.rb b/activerecord/lib/active_record/callbacks.rb index f2e3912c6e..eb44887e18 100644 --- a/activerecord/lib/active_record/callbacks.rb +++ b/activerecord/lib/active_record/callbacks.rb @@ -225,6 +225,55 @@ module ActiveRecord # # This way, the +before_destroy+ gets executed before the <tt>dependent: :destroy</tt> is called, and the data is still available. # + # Also, there are cases when you want several callbacks of the same type to + # be executed in order. + # + # For example: + # + # class Topic + # has_many :children + # + # after_save :log_children + # after_save :do_something_else + # + # private + # + # def log_chidren + # # Child processing + # end + # + # def do_something_else + # # Something else + # end + # end + # + # In this case the +log_children+ gets executed before +do_something_else+. + # The same applies to all non-transactional callbacks. + # + # In case there are multiple transactional callbacks as seen below, the order + # is reversed. + # + # For example: + # + # class Topic + # has_many :children + # + # after_commit :log_children + # after_commit :do_something_else + # + # private + # + # def log_chidren + # # Child processing + # end + # + # def do_something_else + # # Something else + # end + # end + # + # In this case the +do_something_else+ gets executed before +log_children+. + # # == \Transactions # # The entire callback chain of a {#save}[rdoc-ref:Persistence#save], {#save!}[rdoc-ref:Persistence#save!], @@ -283,15 +332,15 @@ module ActiveRecord private - def create_or_update(*) #:nodoc: + def create_or_update(*) _run_save_callbacks { super } end - def _create_record #:nodoc: + def _create_record _run_create_callbacks { super } end - def _update_record(*) #:nodoc: + def _update_record(*) _run_update_callbacks { super } end end |