Rails 3.2.3.rc1 has been released.

### IMPORTANT

This release changes the default value of
*config.active_record.whitelist_attributes* to true.  This change only
affects newly generated applications so it should not cause any
backwards compatibility issues for users who are upgrading but it may
affect some tutorials and introductory material.  For more information
see  the mass assignment section of the [ruby on rails security
guide][1]

We've also adjusted the dependencies on rack-cache and mail to address
the recent security vulnerabilities with those libraries. If you are
running a vulnerable version of mail or rack-cache you should update
both gems to a safe version. We also fixed a couple of regressions in
the render method.

If there are no release blockers, then I will be releasing the final
version on March 29th.
If you find something please open an issue on github and let me know
through email (santiago _at_ wyeworks.com), tweet
([spastorino](http://twitter.com/spastorino)) or cc me on the github
issue.

[1]: http://guides.rubyonrails.org/security.html#mass-assignment

### CHANGES since 3.2.2

*ActionMailer*

*   Upgrade mail version to 2.4.3 *ML*


*ActionPack*

*   Do not include the authenticity token in forms where remote: true
as ajax forms use the meta-tag value *DHH*

*   Turn off verbose mode of rack-cache, we still have X-Rack-Cache to
    check that info. Closes #5245. *Santiago Pastorino*

*   Fix #5238, rendered_format is not set when template is not
rendered. *Piotr Sarnacki*

*   Upgrade rack-cache to 1.2. *JosValim*

*   ActionController::SessionManagement is deprecated. *Santiago Pastorino*

*   Since the router holds references to many parts of the system like
engines, controllers and the application itself, inspecting the route
set can actually be really slow, therefore we default alias inspect to
to_s. *JosValim*

*   Add a new line after the textarea opening tag. Closes #393 *rafaelfranca*

*   Always pass a respond block from to responder. We should let the
responder to decide what to do with the given overridden response
block, and not short circuit it. *sikachu*

*   Fixes layout rendering regression from 3.2.2. *JosValim*


*ActiveModel*

* No changes


*ActiveRecord*

*   Added find_or_create_by_{attribute}! dynamic method. *Andrew White*

*   Whitelist all attribute assignment by default. Change the default
for newly generated applications to whitelist all attribute
assignment.  Also update the generated model classes so users are
reminded of the importance of attr_accessible. *NZKoz*

*   Update ActiveRecord::AttributeMethods#attribute_present? to return
false for empty strings. *Jacobkg*

*   Fix associations when using per class databases. *larskanis*

*   Revert setting NOT NULL constraints in add_timestamps *fxn*

*   Fix mysql to use proper text types. Fixes #3931. *kennyj*

*   Fix #5069 - Protect foreign key from mass assignment through
association builder. *byroot*


*ActiveResource*

* No changes


*ActiveSupport*

* No changes


*Railties*

* No changes


### SHA-1

* SHA-1 (actionmailer-3.2.3.rc1.gem) = 6e945a152d2159918f05dcf4ef72e87d4b75c2bb
* SHA-1 (actionpack-3.2.3.rc1.gem) = 1c5153c4b4865207193d7e8af9a09b493683bc55
* SHA-1 (activemodel-3.2.3.rc1.gem) = eae6bb4cc275e167eb28b35cd8b0a46466dd3c88
* SHA-1 (activerecord-3.2.3.rc1.gem) = 8a2709c7517d9d91911ad3fbfe82af19422b5e24
* SHA-1 (activeresource-3.2.3.rc1.gem) =
770a7120f8148f6391a717c03f08cdb76dcd64ac
* SHA-1 (activesupport-3.2.3.rc1.gem) = 1e89864fc28c7b8cca67eb93696f1b2ecf556b81
* SHA-1 (rails-3.2.3.rc1.gem) = b1dec2b8c59c78111479e3dc36c106e54fe11f1a
* SHA-1 (railties-3.2.3.rc1.gem) = 9fbbb616cd868d1070bf04adeda50c373550c349

You can find an exhaustive list of changes on
[github](https://github.com/rails/rails/compare/v3.2.2...v3.2.3.rc1).

Thanks to everyone, this is your last chance to hold the release if
something goes wrong. So please, give this release a try :).

--

Santiago Pastorino
WyeWorks Co-founder
http://www.wyeworks.com

Twitter: http://twitter.com/spastorino
Github: http://github.com/spastorino