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| author | Emilio Tagua <miloops@gmail.com> | 2010-10-07 16:27:00 -0300 |
|---|---|---|
| committer | Emilio Tagua <miloops@gmail.com> | 2010-11-19 19:08:12 -0300 |
| commit | a62f7220bbad1678dbf114e2f252172e76b44bab (patch) | |
| tree | 59a32f2bf1e30cee2ea347788053b8b9b113e3e0 | |
| parent | da721dae1ea2cc7d33c32080aaaf86e34c91352d (diff) | |
| download | rails-a62f7220bbad1678dbf114e2f252172e76b44bab.tar.gz rails-a62f7220bbad1678dbf114e2f252172e76b44bab.tar.bz2 rails-a62f7220bbad1678dbf114e2f252172e76b44bab.zip | |
Add docs to Identity Map.
| -rw-r--r-- | activerecord/lib/active_record/identity_map.rb | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/identity_map.rb b/activerecord/lib/active_record/identity_map.rb index 6bf77c71fa..94eece9132 100644 --- a/activerecord/lib/active_record/identity_map.rb +++ b/activerecord/lib/active_record/identity_map.rb @@ -1,4 +1,17 @@ module ActiveRecord + # = Active Record Identity Map + # + # Ensures that each object gets loaded only once by keeping every loaded + # object in a map. Looks up objects using the map when referring to them. + # + # More information on Identity Map pattern: + # http://www.martinfowler.com/eaaCatalog/identityMap.html + # + # == Configuration + # + # In order to activate IdentityMap, set <tt>config.active_record.identity_map = true</tt> + # in your <tt>config/application.rb</tt> file. + # module IdentityMap extend ActiveSupport::Concern |