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Expand changelog and upgrading rails guide with IdentityMap info

This commit is contained in:
Carlos Antonio da Silva 2012-03-04 16:10:48 -03:00
parent a8dd21d8b4
commit dde3058c3a
2 changed files with 14 additions and 1 deletions
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11
activerecord/CHANGELOG.md
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@ -1,6 +1,15 @@
## Rails 4.0.0 (unreleased) ##
* Remove IdentityMap *Carlos Antonio da Silva*
* Remove IdentityMap
IdentityMap has never graduated to be an "enabled-by-default" feature, due
to some inconsistencies with associations, as described in this commit:
https://github.com/rails/rails/commit/302c912bf6bcd0fa200d964ec2dc4a44abe328a6
Hence the removal from the codebase, until such issues are fixed.
*Carlos Antonio da Silva*
* Added the schema cache dump feature.

4
railties/guides/source/upgrading_ruby_on_rails.textile
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@ -34,6 +34,10 @@ h4(#plugins4_0). vendor/plugins
Rails 4.0 no longer supports loading plugins from <tt>vendor/plugins</tt>. You must replace any plugins by extracting them to gems and adding them to your Gemfile. If you choose not to make them gems, you can move them into, say, <tt>lib/my_plugin/*</tt> and add an appropriate initializer in <tt>config/initializers/my_plugin.rb</tt>.
h4(#identity_map4_0). IdentityMap
Rails 4.0 has removed <tt>IdentityMap</tt> from <tt>ActiveRecord</tt>, due to "some inconsistencies with associations":https://github.com/rails/rails/commit/302c912bf6bcd0fa200d964ec2dc4a44abe328a6. If you have manually enabled it in your application, you will have to remove the following config that has no effect anymore: <tt>config.active_record.identity_map</tt>.
h3. Upgrading from Rails 3.1 to Rails 3.2
If your application is currently on any version of Rails older than 3.1.x, you should upgrade to Rails 3.1 before attempting an update to Rails 3.2.