Rails 3.2.15 (Oct 16, 2013)

  • When calling the method .find_or_initialize_by_* from a collection_proxy it should set the inverse_of relation even when the entry was found on the db.


  • Callbacks on has_many should access the in memory parent if a inverse_of is set.


  • Fix FinderMethods#lastunscoped primary key.

    Fixes #11917.

    Eugene Kalenkovich

  • Load fixtures from linked folders.

    Kassio Borges

  • When using optimistic locking, updatewas not passing the column to quote_valueto allow the connection adapter to properly determine how to quote the value. This was affecting certain databases that use specific colmn types.

    Fixes: #6763

    Alfred Wong

Rails 3.2.14 (Jul 22, 2013)

  • Fix merge error when Equality LHS is non-attribute. Backport of #7380.

    Karmes Alexander

  • Do not re-create destroyed association when saving the parent object.

    Fixes #11450.

    Paul Nikitochkin

  • Do not shallow the original exception in exec_cacheon PostgreSQL adapter.

    Fixes #11260.

    Rafael Mendonça França

  • Fix ActiveRecord::Storeincorrectly tracking changes of its attributes. Fixes #10373.

    Janko Marohnić

  • Fix a bug that prevented the use of the default STI inheritance column (ActiveRecord::Base.inheritance_column = 'some_column'.)

    chapmajs + Takehiro Adachi

  • Fix mysql2 adapter raises the correct exception when executing a query on a closed connection.

    Yves Senn

  • Fixes bug where Company.new.contract_idswould incorrectly load all non-associated contracts.


    company = Company.new # Company has many :contracts
    # before
    company.contract_ids # => SELECT ... WHERE `contracts`.`company_id` IS NULL
    # after
    company.contract_ids # => []

    Jared Armstrong

  • Fix the :primary_keyoption for has_many associations. Fixes #10693.

    Yves Senn

  • fixes bug introduced by #3329. Now, when autosaving associations, deletions happen before inserts and saves. This prevents a 'duplicate unique value' database error that would occur if a record being created had the same value on a unique indexed field as that of a record being destroyed.

    Backport of #10417

    Johnny Holton

  • Fix that under some conditions, Active Record could produce invalid SQL of the sort: "SELECT DISTINCT DISTINCT".

    Backport of #6792.

    Ben Woosley

  • Require ActiveRecord::Basein railtie hooks for rake_tasks, console and runner to avoid circular constant loading issues.

    Backport #7695.

    Fixes #7683 and #882

    Ben Holley

  • Maintain context for joins within ActiveRecord::Relation merges. Backport #10164.

    Neeraj Singh + Andrew Horner

  • Make sure the EXPLAINcommand is never triggered by a select_dbcall.

    Daniel Schierbeck

  • Revert changes on pluckthat was ignoring the select clause when the relation already has one. This caused a regression since it changed the behavior in a stable release.

    Fixes #9777.

    Rafael Mendonça França

  • Confirm a record has not already been destroyed before decrementing counter cache.

    Ben Tucker

  • Default values for PostgreSQL bigint types now get parsed and dumped to the schema correctly. Backport #10098.

    Erik Peterson

  • Removed warning when auto_explain_threshold_in_secondsis set and the connection adapter doesn't support explain. This is causing a regression since the Active Record Railtie is trying to connect to the development database in the application boot.

    Rafael Mendonça França

  • Do not reset inheritance_columnwhen it's set explicitly. Backport of #5327.

    kennyj + Fred Wu

  • Fix a problem wrong exception is occured when raising no translatable exception in PostgreSQL.


  • Resets the postgres search path in the structure.sql after the structure is dumped in order to find schema_migrations table when multiples schemas are used. Fixes #9796.

    Juan M. Cuello + Dembskiy Alexander

  • Reload the association target if it's stale. @stale_state should be nil when a model isn't saved. Fixes #7526.

    Larry Lv

  • Don't read CSV files during execution of db:fixtures:load. CSV support for fixtures was removed some time ago but the task was still loading them, even though later the code was looking for the related yaml file instead.


Rails 3.2.13 (Mar 18, 2013)

  • Chaining multiple preloaded scopes will correctly preload all the scopes at the same time.

    Chris Geihsler

  • Reverted 921a296a3390192a71abeec6d9a035cc6d1865c8, 'Quote numeric values compared to string columns.' This caused several regressions.

    Steve Klabnik

  • Fix overriding of attributes by default_scopeon ActiveRecord::Base#dup.

    Hiroshige UMINO

  • Fix issue with overriding Active Record reader methods with a composed object and using that attribute as the scope of a uniqueness_ofvalidation. Backport #7072.

    Peter Brown

  • Sqlite now preserves custom primary keys when copying or altering tables. Fixes #9367. Backport #2312.

    Sean Scally + Yves Senn

  • Preloading has_many :throughassociations with conditions won't cache the :throughassociation. This will prevent invalid subsets to be cached. Fixes #8423. Backport #9252.


    class User
      has_many :posts
      has_many :recent_comments, -> { where('created_at > ?', 1.week.ago) }, :through => :posts
    a_user = User.includes(:recent_comments).first
    # this is preloaded
    # fetching the recent_comments through the posts association won't preload it.

    Yves Senn

  • Fix handling of dirty time zone aware attributes

    Previously, when time_zone_aware_attributeswere enabled, after changing a datetime or timestamp attribute and then changing it back to the original value, changed_attributesstill tracked the attribute as changed. This caused [attribute]_changed?and changed?methods to return true incorrectly.


    in_time_zone 'Paris' do
      order = Order.new
      original_time = Time.local(2012, 10, 10)
      order.shipped_at = original_time
      order.changed? # => false
      # changing value
      order.shipped_at = Time.local(2013, 1, 1)
      order.changed? # => true
      # reverting to original value
      order.shipped_at = original_time
      order.changed? # => false, used to return true

    Backport of #9073 Fixes #8898

    Lilibeth De La Cruz

  • Fix counter cache columns not updated when replacing has_many :through associations. Backport #8400. Fix #7630.

    Matthew Robertson

  • Don't update column_defaultswhen calling destructive methods on column with default value. Backport c517602. Fix #6115.

    Piotr Sarnacki + Aleksey Magusev + Alan Daud

  • When #countis used in conjunction with #uniqwe perform count(:distinct => true). Fix #6865.


    relation.uniq.count # => SELECT COUNT(DISTINCT *)

    Yves Senn + Kaspar Schiess

  • Fix ActiveRecord::Relation#pluckwhen columns or tables are reserved words. Backport #7536. Fix #8968.

    Ian Lesperance + Yves Senn + Kaspar Schiess

  • Don't run explain on slow queries for database adapters that don't support it. Backport #6197.

    Blake Smith

  • Revert round usec when comparing timestamp attributes in the dirty tracking. Fixes #8460.

    Andrew White

  • Revert creation of through association models when using collection=[]on a has_many :throughassociation from an unsaved model. Fix #7661, #8269.

    Ernie Miller

  • Fix undefined method to_iwhen calling newon a scope that uses an Array; Fix FloatDomainError when setting integer column to NaN. Fixes #8718, #8734, #8757.

    Jason Stirk + Tristan Harward

  • Serialized attributes can be serialized in integer columns. Fix #8575.

    Rafael Mendonça França

  • Keep index names when using alter_tablewith sqlite3. Fix #3489. Backport #8522.

    Yves Senn

  • Recognize migrations placed in directories containing numbers and 'rb'. Fix #8492. Backport of #8500.

    Yves Senn

  • Add ActiveRecord::Base.cache_timestamp_formatclass attribute to control the format of the timestamp value in the cache key. This allows users to improve the precision of the cache key. Fixes #8195.

    Rafael Mendonça França

  • Add :nsecdate format. This can be used to improve the precision of cache key. Please note that this format only works with Ruby 1.9, Ruby 1.8 will ignore it completely.

    Jamie Gaskins

  • Unscope update_column(s)query to ignore default scope.

    When applying default_scopeto a class with a where clause, using update_column(s)could generate a query that would not properly update the record due to the where clause from the default_scopebeing applied to the update query.

    class User < ActiveRecord::Base
      default_scope where(active: true)
    user = User.first
    user.active = false
    user.update_column(:active, true) # => false

    In this situation we want to skip the default_scope clause and just update the record based on the primary key. With this change:

    user.update_column(:active, true) # => true

    Backport of #8436 fix.

    Carlos Antonio da Silva

  • Fix performance problem with primary_key method in PostgreSQL adapter when having many schemas. Uses pg_constraint table instead of pg_depend table which has many records in general. Fix #8414


  • Do not instantiate intermediate Active Record objects when eager loading. These records caused after_findto run more than expected. Fix #3313 Backport of #8403

    Yves Senn

  • Fix pluckto work with joins. Backport of #4942.

    Carlos Antonio da Silva

  • Fix a problem with translate_exceptionmethod in a non English environment. Backport of #6397.


  • Fix dirty attribute checks for TimeZoneConversion with nil and blank datetime attributes. Setting a nil datetime to a blank string should not result in a change being flagged. Fixes #8310. Backport of #8311.

    Alisdair McDiarmid

  • Prevent mass assignment to the type column of polymorphic associations when using build. Fixes #8265. Backport of #8291.

    Yves Senn

  • When running migrations on Postgresql, the :limitoption for binaryand textcolumns is silently dropped. Previously, these migrations caused sql exceptions, because Postgresql doesn't support limits on these types.

    Victor Costan

  • #pluckcan be used on a relation with select clause. Fixes #7551. Backport of #8176.


    Topic.select([:approved, :id]).order(:id).pluck(:id)

    Yves Senn

  • Use nil?instead of blank?to check whether dynamic finder with a bang should raise RecordNotFound. Fixes #7238.

    Nikita Afanasenko

  • Fix deleting from a HABTM join table upon destroying an object of a model with optimistic locking enabled. Fixes #5332.

    Nick Rogers

  • Use query cache/uncache when using ENV. Fixes #6951. Backport of #8074.


  • Do not create useless database transaction when building has_oneassociation.


    User.has_one :profile

    Backport of #8154.

    Bogdan Gusiev

  • AR::Base#attributes_before_type_castnow returns unserialized values for serialized attributes.

    Nikita Afanasenko

  • Fix issue that raises NameErrorwhen overriding the accepts_nested_attributesin child classes.


    class Shared::Person < ActiveRecord::Base
      has_one :address
      accepts_nested_attributes :address, :reject_if => :all_blank
    class Person < Shared::Person
      accepts_nested_attributes :address
    #=> NameError: method `address_attributes=' not defined in Person


    #=> Person(id: integer, ...)

    Fixes #8131.

    Gabriel Sobrinho, Ricardo Henrique

Rails 3.2.12 (Feb 11, 2013)

  • Quote numeric values being compared to non-numeric columns. Otherwise, in some database, the string column values will be coerced to a numeric allowing 0, 0.0 or false to match any string starting with a non-digit.


    App.where(apikey: 0) # => SELECT * FROM users WHERE apikey = '0'

    Dylan Smith

Rails 3.2.11 (Jan 8, 2013)

  • Fix querying with an empty hash Damien Mathieu[CVE-2013-0155]

Rails 3.2.10 (Jan 2, 2013)

  • CVE-2012-5664 options hashes should only be extracted if there are extra parameters

Rails 3.2.9 (Nov 12, 2012)

  • Fix find_in_batchescrashing when IDs are strings and start option is not specified.

    Alexis Bernard

  • Fix issue with collection associations calling first(n)/last(n) and attempting to set the inverse association when :inverse_ofwas used. Fixes #8087.

    Carlos Antonio da Silva

  • Fix bug when Column is trying to type cast boolean values to integer. Fixes #8067.

    Rafael Mendonça França

  • Fix bug where rake db:test:preparetries to load the structure.sql into development database. Fixes #8032.

    Grace Liu + Rafael Mendonça França

  • Fixed support for DATABASE_URLenvironment variable for rake db tasks. Grace Liu

  • Fix bug where update_columnsand update_column would not let you update the primary key column.

    Henrik Nyh

  • Decode URI encoded attributes on database connection URLs.

    Shawn Veader

  • Fix AR#dup to nullify the validation errors in the dup'ed object. Previously the original and the dup'ed object shared the same errors.

    Christian Seiler

  • Synchronize around deleting from the reserved connections hash. Fixes #7955

  • PostgreSQL adapter correctly fetches default values when using multiple schemas and domains in a db. Fixes #7914

    Arturo Pie

  • Fix deprecation notice when loading a collection association that selects columns from other tables, if a new record was previously built using that association.

    Ernie Miller

  • The postgres adapter now supports tables with capital letters. Fix #5920

    Yves Senn

  • CollectionAssociation#countreturns 0without querying if the parent record is not persisted.


    # SELECT COUNT(*) FROM "pets" WHERE "pets"."person_id" IS NULL
    # => 0


    # fires without sql query
    # => 0

    Francesco Rodriguez

  • Fix reset_counterscrashing on has_many :through associations. Fix #7822.


  • ConnectionPool recognizes checkout_timeout spec key as taking precedence over legacy wait_timeout spec key, can be used to avoid conflict with mysql2 use of wait_timeout. Closes #7684.


  • Rename field_changed? to _field_changed? so that users can create a field named field

    Akira Matsuda, backported by Steve Klabnik

  • Fix creation of through association models when using collection=[]on a has_many :throughassociation from an unsaved model. Fix #7661.

    Ernie Miller

  • Explain only normal CRUD sql (select / update / insert / delete). Fix problem that explains unexplainable sql. Closes #7544 #6458.


  • Backport test coverage to ensure that PostgreSQL auto-reconnect functionality remains healthy.

    Steve Jorgensen

  • Use config instead of config when executing databases.rake in the mysql/mysql2. A correct option for a database.yml is 'encoding'.


  • Fix ConnectionAdapters::Column.type_cast_code integer conversion, to always convert values to integer calling to_i. Fixes #7509.

    Thiago Pradi

  • Fix time column type casting for invalid time string values to correctly return nil.

    Adam Meehan

  • Fix becomeswhen using a configured inheritance_column.

    Yves Senn

  • Fix reset_counterswhen there are multiple belongs_toassociation with the same foreign key and one of them have a counter cache. Fixes #5200.

    Dave Desrochers

  • Round usec when comparing timestamp attributes in the dirty tracking. Fixes #6975.


  • Use inversed parent for first and last child of has_many association.

    Ravil Bayramgalin

  • Fix Column.microseconds and Column.fast_string_to_date to avoid converting timestamp seconds to a float, since it occasionally results in inaccuracies with microsecond-precision times. Fixes #7352.

    Ari Pollak

  • Fix increment!, decrement!, toggle! that was skipping callbacks. Fixes #7306.

    Rafael Mendonça França

  • Fix AR#create to return an unsaved record when AR::RecordInvalid is raised. Fixes #3217.

    Dave Yeu

  • Remove unnecessary transaction when assigning has_one associations with a nil or equal value. Fix #7191.


  • Allow store to work with an empty column. Fix #4840.

    Jeremy Walker

  • Remove prepared statement from system query in postgresql adapter. Fix #5872.

    Ivan Evtuhovich

  • Make sure :environmenttask is executed before db:schema:loador db:structure:loadFixes #4772.

    Seamus Abshere

Rails 3.2.8 (Aug 9, 2012)

  • Do not consider the numeric attribute as changed if the old value is zero and the new value is not a string. Fixes #7237.

    Rafael Mendonça França

  • Removes the deprecation of update_attribute. fxn

  • Reverted the deprecation of composed_of. Rafael Mendonça França

  • Reverted the deprecation of *_sqlassociation options. They will be deprecated in 4.0 instead. Jon Leighton

  • Do not eager load AR session store. ActiveRecord::SessionStore depends on the abstract store in Action Pack. Eager loading this class would break client code that eager loads Active Record standalone. Fixes #7160

    Xavier Noria

  • Do not set RAILS_ENV to "development" when using db:test:prepareand related rake tasks. This was causing the truncation of the development database data when using RSpec. Fixes #7175.

    Rafael Mendonça França

Rails 3.2.7 (Jul 26, 2012)

  • :finder_sqland :counter_sqloptions on collection associations are deprecated. Please transition to using scopes.

    Jon Leighton

  • :insert_sqland :delete_sqloptions on has_and_belongs_to_manyassociations are deprecated. Please transition to using has_many :through

    Jon Leighton

  • composed_ofhas been deprecated. You'll have to write your own accessor and mutator methods if you'd like to use value objects to represent some portion of your models.

    Steve Klabnik

  • update_attributehas been deprecated. Use update_columnif you want to bypass mass-assignment protection, validations, callbacks, and touching of updated_at. Otherwise please use update_attributes.

    Steve Klabnik

Rails 3.2.6 (Jun 12, 2012)

  • protect against the nesting of hashes changing the table context in the next call to build_from_hash. This fix covers this case as well.


  • Revert earlier 'perf fix' (see 3.2.4 changelog / GH #6289). This change introduced a regression (GH #6609). assoc.clear and assoc.delete_all have loaded the association before doing the delete since at least Rails 2.3. Doing the delete without loading the records means that the before_removeand after_removecallbacks do not get invoked. Therefore, this change was less a fix a more an optimisation, which should only have gone into master.

    Jon Leighton

Rails 3.2.5 (Jun 1, 2012)

  • Restore behavior of Active Record 3.2.3 scopes. A series of commits relating to preloading and scopes caused a regression.

    Andrew White

Rails 3.2.4 (May 31, 2012)

  • Perf fix: Don't load the records when doing assoc.delete_all. GH #6289. Jon Leighton

  • Association preloading shouldn't be affected by the current scoping. This could cause infinite recursion and potentially other problems. See GH #5667. Jon Leighton

  • Datetime attributes are forced to be changed. GH #3965

  • Fix attribute casting. GH #5549

  • Fix #5667. Preloading should ignore scoping.

  • Predicate builder should not recurse for determining where columns. Thanks to Ben Murphy for reporting this! CVE-2012-2661

Rails 3.2.3 (March 30, 2012)

  • 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

Rails 3.2.2 (March 1, 2012)

  • No changes.

Rails 3.2.1 (January 26, 2012)

  • The threshold for auto EXPLAIN is ignored if there's no logger. fxn

  • Call to_son the value passed to table_name=, in particular symbols are supported (regression). Sergey Nartimov

  • Fix possible race condition when two threads try to define attribute methods for the same class. Jon Leighton

Rails 3.2.0 (January 20, 2012)

  • Added a with_lockmethod to ActiveRecord objects, which starts a transaction, locks the object (pessimistically) and yields to the block. The method takes one (optional) parameter and passes it to lock!.


    class Order < ActiveRecord::Base
      def cancel!
        transaction do
          # ... cancelling logic


    class Order < ActiveRecord::Base
      def cancel!
        with_lock do
          # ... cancelling logic

    Olek Janiszewski

  • 'on' and 'ON' boolean columns values are type casted to true Santiago Pastorino

  • Added ability to run migrations only for given scope, which allows to run migrations only from one engine (for example to revert changes from engine that you want to remove).

    Example: rake db:migrate SCOPE=blog

    Piotr Sarnacki

  • Migrations copied from engines are now scoped with engine's name, for example 01_create_posts.blog.rb. Piotr Sarnacki

  • Implements AR::Base.silence_auto_explain. This method allows the user to selectively disable automatic EXPLAINs within a block. fxn

  • Implements automatic EXPLAIN logging for slow queries.

    A new configuration parameter config.active_record.auto_explain_threshold_in_seconds determines what's to be considered a slow query. Setting that to nildisables this feature. Defaults are 0.5 in development mode, and nilin test and production modes.

    As of this writing there's support for SQLite, MySQL (mysql2 adapter), and PostgreSQL.


  • Implemented ActiveRecord::Calculations#pluck method

    Method returns Array of column value from table under ActiveRecord model


    Bogdan Gusiev

  • Automatic closure of connections in threads is deprecated. For example the following code is deprecated:

    Thread.new { Post.find(1) }.join

    It should be changed to close the database connection at the end of the thread:

    Thread.new { Post.find(1) Post.connection.close }.join

    Only people who spawn threads in their application code need to worry about this change.

  • Deprecated:

    • set_table_name

    • set_inheritance_column

    • set_sequence_name

    • set_primary_key

    • set_locking_column

    Use an assignment method instead. For example, instead of set_table_name, use self.table_name=:

     class Project < ActiveRecord::Base
       self.table_name = "project"

    Or define your own self.table_namemethod:

     class Post < ActiveRecord::Base
       def self.table_name
         "special_" + super
     Post.table_name # => "special_posts"

    Jon Leighton

  • Generated association methods are created within a separate module to allow overriding and composition using super. For a class named MyModel, the module is named MyModel::GeneratedFeatureMethods. It is included into the model class immediately after the generated_attributes_methods module defined in ActiveModel, so association methods override attribute methods of the same name. Josh Susser

  • Implemented ActiveRecord::Relation#explain. fxn

  • Add ActiveRecord::QueryMethods#uniq for generating unique queries.


    Client.select('DISTINCT name')



    This also allows you to revert the unqueness in a relation:


    Jon Leighton

  • Support index sort order in sqlite, mysql and postgres adapters. Vlad Jebelev

  • Allow the :class_name option for associations to take a symbol (:Client) in addition to a string ('Client').

    This is to avoid confusing newbies, and to be consistent with the fact that other options like :foreign_key already allow a symbol or a string.

    Jon Leighton

  • In development mode the db:drop task also drops the test database. For symmetry with the db:create task. Dmitriy Kiriyenko

  • Added ActiveRecord::Base.store for declaring simple single-column key/value stores DHH

    class User < ActiveRecord::Base
      store :settings, accessors: [ :color, :homepage ]
    u = User.new(color: 'black', homepage: '37signals.com')
    u.color                          # Accessor stored attribute
    u.settings[:country] = 'Denmark' # Any attribute, even if not specified with an accessor
  • MySQL: case-insensitive uniqueness validation avoids calling LOWER when the column already uses a case-insensitive collation. Fixes #561.

    Joseph Palermo

  • Transactional fixtures enlist all active database connections. You can test models on different connections without disabling transactional fixtures.

    Jeremy Kemper

  • Add first_or_create, first_or_create!, first_or_initialize methods to Active Record. This is a better approach over the old find_or_create_by dynamic methods because it's clearer which arguments are used to find the record and which are used to create it:

    User.where(:first_name => "Scarlett").first_or_create!(:last_name => "Johansson")

    Andrés Mejía

  • Fix nested attributes bug where _destroy parameter is taken into account during :reject_if => :all_blank (fixes #2937)

    Aaron Christy

  • Add ActiveSupport::Cache::NullStore for use in development and testing.

    Brian Durand

Please check 3-1-stable for previous changes.