From 5ef2b089f03271fcff02280fdcbb12d38d726eba Mon Sep 17 00:00:00 2001 From: Rick Olson Date: Sat, 2 Feb 2008 20:18:18 +0000 Subject: Reshuffle load order so that routes and observers are initialized after plugins and app initializers. Closes #10980 [rick, fxn] git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@8787 5ecf4fe2-1ee6-0310-87b1-e25e094e27de --- activerecord/CHANGELOG | 2 ++ activerecord/lib/active_record/observer.rb | 14 ++++++++++++++ 2 files changed, 16 insertions(+) (limited to 'activerecord') diff --git a/activerecord/CHANGELOG b/activerecord/CHANGELOG index c10bb9f416..b2e2a117fb 100644 --- a/activerecord/CHANGELOG +++ b/activerecord/CHANGELOG @@ -1,5 +1,7 @@ *SVN* +* Add note about how ActiveRecord::Observer classes are initialized in a Rails app. #10980 [fxn] + * MySQL: omit text/blob defaults from the schema instead of using an empty string. #10963 [mdeiters] * belongs_to supports :dependent => :destroy and :delete. #10592 [Jonathan Viney] diff --git a/activerecord/lib/active_record/observer.rb b/activerecord/lib/active_record/observer.rb index cfdeae3592..6e4db637f5 100644 --- a/activerecord/lib/active_record/observer.rb +++ b/activerecord/lib/active_record/observer.rb @@ -125,6 +125,20 @@ module ActiveRecord # # Observers will not be invoked unless you define these in your application configuration. # + # == Loading + # + # Observers register themselves in the model class they observe, since it is the class that + # notifies them of events when they occur. As a side-effect, when an observer is loaded its + # corresponding model class is loaded. + # + # Up to (and including) Rails 2.0.2 observers were instantiated between plugins and + # application initializers. Now observers are loaded after application initializers, + # so observed models can make use of extensions. + # + # If by any chance you are using observed models in the initialization you can still + # load their observers by calling ModelObserver.instance before. Observers are + # singletons and that call instantiates and registers them. + # class Observer include Singleton -- cgit v1.2.3