paper-trail-gem--paper_trail/CHANGELOG.md

Changelog

This project follows semver 2.0.0 and the recommendations of keepachangelog.com.

Unreleased

Breaking Changes

• #1399 - Same change re: YAML.safe_load as in 13.0.0, but this time for Rails 6.0 and 6.1.

Dependencies

• Drop support for Rails 5.2, which reached EoL on 2022-06-01
• Drop support for Ruby 2.6, which reached EoL on 2022-03-31

Added

• None

Fixed

• None

13.0.0 (2022-08-15)

Breaking Changes

• For Rails >= 7.0, the default serializer will now use YAML.safe_load unless ActiveRecord.use_yaml_unsafe_load. This change only affects users whose versions table has object or object_changes columns of type text, and who use the YAML serializer. People who use the JSON serializer, or those with json(b) columns, are unaffected. Please see doc/pt_13_yaml_safe_load.md for details.

Added

• None

Fixed

• None

12.3.0 (2022-03-13)

Breaking Changes

• None

Added

• #1371 - Added in_after_callback argument to PaperTrail::RecordTrail#save_with_version, to allow the caller to indicate if this method is being called during an after callback. Defaults to false.
• #1374 - Added option --uuid when generating new migration. This can be used to set the type of item_id column to uuid for use with paper_trail on a database that uses uuid as primary key.

Fixed

• #1373 - Add CLI option to use uuid type for item_id when generating migration.
• #1376 - Create a version record when associated object is touched. Restores the behavior of PaperTrail < v12.1.0.

12.2.0 (2022-01-21)

Breaking Changes

• None

Added

• #1365 - Support Rails 7.0
• #1349 - if: and unless: work with touch events now.

Fixed

• #1366 - Fixed a bug where the create_versions migration lead to a broken db/schema.rb for Ruby 3

Dependencies

• #1338 - Support Psych version 4
• ruby >= 2.6 (was >= 2.5). Ruby 2.5 reached EoL on 2021-03-31.

12.1.0 (2021-08-30)

Breaking Changes

• None

Added

• #1292 - where_attribute_changes queries for versions where the object's attribute changed to or from any values.
• #1291 - where_object_changes_to queries for versions where the object's attributes changed to one set of known values from any other set of values.

Fixed

• #1285 - For ActiveRecord >= 6.0, the touch callback will no longer create a new Version for skipped or ignored attributes.
• #1309 - Removes item_subtype requirement when specifying model-specific limits.
• #1333 - Improve reification of STI models that use find_sti_class/sti_class_for to customize single table inheritance.

12.0.0 (2021-03-29)

Breaking Changes

• #1281 Rails: Instead of an Engine, PT now provides a Railtie, which is simpler. This was not expected to be a breaking change, but has caused trouble for some people:
  • Issue with the deprecated autoloader = :classic setting (https://github.com/paper-trail-gem/paper_trail/issues/1305)
• Rails: The deprecated config.paper_trail configuration technique has been removed. This configuration object was deprecated in 10.2.0. It only had one key, config.paper_trail.enabled. Please review docs section 2.d. Turning PaperTrail Off for alternatives.

Added

• where_object_changes_from queries for versions where the object's attributes changed from one set of known values to any other set of values.

Fixed

• #1281 Rails: Instead of an Engine, PT now provides a Railtie, which is simpler.
• Expand kwargs passed to save_with_version using double splat operator - Rails 6.1 compatibility
• #1287 - Fix 'rails db:migrate' error when run against an app with mysql2 adapter

Dependencies

• Drop support for ruby 2.4 (reached EoL on 2020-03-31)

11.1.0 (2020-12-16)

Breaking Changes

• None

Added

• #1272 - Rails 6.1 compatibility

Fixed

• None

11.0.0 (2020-08-24)

Breaking Changes

• #1221 If you use the experimental association-tracking feature, and you forget to install the paper_trail-association_tracking gem, then, when you call track_associations= you will get a NoMethodError instead of the previous detailed error. Normally the removal of such a temporary warning would not be treated as a breaking change, but since this relates to PT-AT, it seemed warranted.
• VersionConcern#sibling_versions is now private, and its arity has changed.

Added

• None

Fixed

• #1242 - Generator make wrong migration for Oracle database

• #1238 - Query optimization in reify

• #1256 - Skip version for timestamp when changed attributed is ignored via Hash

Dependencies

• Drop support for rails <= 5.1 (reached EOL when 6.0 was released, per https://guides.rubyonrails.org/maintenance_policy.html)
• Drop support for ruby 2.3 (reached EOL on 2019-04-01)

10.3.1 (2019-07-31)

Breaking Changes

• None

Added

• None

Fixed

• None

Dependencies

• #1213 - Allow contributors to install incompatible versions of ActiveRecord. See discussion in paper_trail/compatibility.rb

10.3.0 (2019-04-09)

Breaking Changes

• None

Added

• #1194 - Added a 'limit' option to has_paper_trail, allowing models to override the global PaperTrail.config.version_limit setting.

Fixed

• #1196 - In the installation migration, change versions.item_id from 4 byte integer to 8 bytes (bigint).

10.2.1 (2019-03-14)

Breaking Changes

• None

Added

• None

Fixed

• #1184 - No need to calculate previous values of skipped attributes
• #1188 - Optimized the memory allocations during the building of every particular Version object. That can help a lot for heavy bulk processing. In additional we advise to use json[b] DB types for object and object_changes Version columns, in order to reach best possible RAM performance.

10.2.0 (2019-01-31)

Breaking Changes

• None

Added

• Support ruby 2.6.0
• #1182 - Support rails 6.0.0.beta1

Fixed

• #1177 - Do not store ignored and skipped attributes in object_changes on destroy.

Deprecated

• #1176 - config.paper_trail.enabled

10.1.0 (2018-12-04)

Breaking Changes

• None

Deprecated

• #1158 - Passing association name as versions: option or Version class name as class_name: options directly to has_paper_trail. Use has_paper_trail versions: {name: :my_name, class_name: "MyVersionModel"} instead.

Added

• #1166 - New global option has_paper_trail_defaults, defaults for has_paper_trail
• #1158 — Add the ability to pass options, such as scope or extend: to the has_many :versions association macro.
• #1172 - Support rails 6.0.0.alpha

Fixed

• None

10.0.1 (2018-09-01)

Breaking Changes

• None

Added

• None

Fixed

• #1150 - When PT-AT is not loaded, and someone sets track_associations = false, it should warn, not raise.

10.0.0 (2018-09-01)

PT 10 tackles some tough issues that required breaking changes. We fixed a rare issue with STI, and saved major disk space in databases with tens of millions of version records. Special thanks to @lorint and @seanlinsley, respectively.

Breaking changes affecting most people

• #1132 - Removed a dozen methods deprecated in PT 9. Make sure you've addressed all deprecation warnings before upgrading.

Breaking changes affecting fewer people

• db9c392d - paper_trail-association_tracking is no longer a runtime dependency. If you use it (track_associations = true) you must now add it to your own Gemfile. See also PT-AT #7
• #1130 - Removed save_changes. For those wanting to save space, it's more effective to drop the object column. If you need ultimate control over the object_changes column, you can write your own object_changes_adapter.

Breaking changes most people won't care about

• #1121 - touch now always inserts null in object_changes.
• #1123 - object_changes is now populated on destroy in order to make where_object_changes usable when you've dropped the object column. Sean is working on an optional backport migration and will post about it in #1099 when he's done.

Added

• #1099 - Ability to save ~50% storage space by making the object column optional. Note that this disables reify and where_object.

Fixed

• #594 - A rare issue with reification of STI subclasses, affecting only PT-AT users who have a model with mutliple associations, whose foreign keys are named the same, and whose foreign models are STI with the same parent class. This fix requires a schema change. See docs section 4.b.1 The optional item_subtype column for instructions.

9.2.0 (2018-06-09)

Breaking Changes

• None

Added

• #1070 - The experimental associations tracking feature has been moved to a separate gem, paper_trail-association_tracking. PT will, for now, have a runtime dependency on this new gem. So, assuming the gem extraction goes well, no breaking changes are anticipated.
• #1093 - PaperTrail.config.object_changes_adapter - Expert users can write their own adapter to control how the changes for each version are stored in the object_changes column. An example of this implementation using the hashdiff gem can be found here: paper_trail-hashdiff

Fixed

• None

9.1.1 (2018-05-30)

Breaking Changes

• None

Added

• None

Fixed

• #1098 - Fix regression in 9.1.0 re: generator --with-associations

9.1.0 (2018-05-23)

Breaking Changes

• None

Added

• #1091 - PaperTrail.config.association_reify_error_behaviour - For users of the experimental association tracking feature. Starting with PT 9.0.0, reification of has_one associations is stricter. This option gives users some choices for how to handle the PaperTrail::Reifiers::HasOne::FoundMoreThanOne error introduced in PT 9. See README section 4.b.1. "Known Issues" for more details.

Fixed

• None

9.0.2 (2018-05-14)

Breaking Changes

• None

Added

• None

Fixed

• #1084 The touch callback (added in 9.0.0) now inserts the correct value into the versions.object column.

Other

• Stop testing against rails 5.0, which reached EoL on 2018-04-15, when 5.2 was released, per the rails maintenance policy

9.0.1 (2018-04-23)

Breaking Changes

• None

Added

• #1076 Add save_with_version, a replacement for deprecated method touch_with_version. Not exactly the same, it's a save, not a touch.
• #1074 PaperTrail.request do ... end now returns the value the given block.

Fixed

• None

9.0.0 (2018-03-26)

Breaking Changes, Major

• #1063 - touch will now create a version. This can be configured with the :on option. See documentation section 2.a. "Choosing Lifecycle Events To Monitor".
• Drop support for ruby 2.2, whose EoL is the end of March, 2018
• PaperTrail now uses frozen_string_literal, so you should assume that all strings it returns are frozen.
• Using where_object_changes to read YAML from a text column will now raise error, was deprecated in 8.1.0.

Breaking Changes, Minor

• Removed deprecated Version#originator, use #paper_trail_originator
• Using paper_trail.on_destroy(:after) with ActiveRecord's belongs_to_required_by_default will produce an error instead of a warning.
• Removed the warn_about_not_setting_whodunnit controller method. This will only be a problem for you if you are skipping it, eg. skip_after_action :warn_about_not_setting_whodunnit, which few people did.

Deprecated

• #1063 - paper_trail.touch_with_version is deprecated in favor of touch.
• #1033 - Request variables are now set using eg. PaperTrail.request.whodunnit= and the old way, PaperTrail.whodunnit= is deprecated.

Added

• #1067 - Add support to Rails 5.2.
• #1033 - Set request variables temporarily using a block, eg. PaperTrail.request(whodunnit: 'Jared') do .. end
• #1037 Add paper_trail.update_columns
• #961 - Instead of crashing when misconfigured Custom Version Classes are used, an error will be raised earlier, with a much more helpful message.
• Failing to set PaperTrail.config.track_associations will no longer produce a warning. The default (false) will remain the same.

Fixed

• #1051 - touch_with_version should always create a version, regardles of the :only option
• #1047 - A rare issue where touch_with_version saved less data than expected, but only when the update callback was not installed, eg. has_paper_trail(on: [])
• #1042 - A rare issue with load order when using PT outside of rails
• #594 - Improved the error message for a very rare issue in the experimental association tracking feature involving two has_one associations, referencing STI models with the same base class, and the same foreign_key.

8.1.2 (2017-12-22)

Breaking Changes

• None

Added

• None

Fixed

• #1028 Reifying associations will now use base_class name instead of class name to reify STI models corrrectly.

8.1.1 (2017-12-10)

Breaking Changes

• None

Added

• None

Fixed

• #1018 Serializing postgres arrays

8.1.0 (2017-11-30)

Breaking Changes

• None

Added

• #997 Deprecate where_object_changes when reading YAML from a text column

Fixed

• #1009 End generated config/initializers/paper_trail.rb with newline.

8.0.1 (2017-10-25)

Breaking Changes

• None

Added

• None

Fixed

• #1003 - Warn when PT cannot be loaded because rails is not loaded yet.

8.0.0 (2017-10-04)

Breaking Changes

• Drop support for rails 4.0 and 4.1, whose EoL was 2016-06-30
• Drop support for ruby 2.1, whose EoL was 2017-04-01
• #803 - where_object_changes no longer supports reading json from a text column

Added

• None

Fixed

• #996 - Incorrect item_type in association reification query

7.1.3 (2017-09-19)

Breaking Changes

• None

Added

• None

Fixed

• #988 - Fix ActiveRecord version check in VersionConcern for Rails 4.0

7.1.2 (2017-08-30)

Breaking Changes

• None

Added

• None

Fixed

• #985 - Fix RecordInvalid error on nil item association when belongs_to_required_by_default is enabled.

7.1.1 (2017-08-18)

Breaking Changes

• None

Added

• None

Fixed

• Stop including unnecessary files in released gem. Reduces .gem file size from 100K to 30K.
• #984 - Fix NameError suspected to be caused by autoload race condition.

7.1.0 (2017-07-09)

Breaking Changes

• None

Added

• #803 Deprecate where_object_changes when reading json from a text column
• #976 PaperTrail.whodunnit accepts a Proc

Fixed

• None

7.0.3 (2017-06-01)

Breaking Changes

• None

Added

• None

Fixed

• #959 - Add migration version (eg. [5.1]) to all migration generators.

7.0.2 (2017-04-26)

Breaking Changes

• None

Added

• #932 - PaperTrail.whodunnit now accepts a block.

Fixed

• #956 - Fix ActiveRecord >= 5.1 version check

7.0.1 (2017-04-10)

Breaking Changes

• None

Added

• Generate cleaner migrations for databases other than MySQL

Fixed

• #949 - Inherit from the new versioned migration class, e.g. ActiveRecord::Migration[5.1]

7.0.0 (2017-04-01)

Breaking Changes

• Drop support for ruby 1.9.3, whose EOL was 2015-02-23
• Drop support for ruby 2.0.0, whose EOL was 2016-02-24
• Remove deprecated config methods:
  • PaperTrail.serialized_attributes?
  • PaperTrail.config.serialized_attributes
  • PaperTrail.config.serialized_attributes=
• Sinatra integration moved to paper_trail-sinatra gem

Added

• PaperTrail.gem_version returns a Gem::Version, nice for comparisons.

Fixed

• #925 - Update RSpec matchers to work with custom version association names
• #929 - Fix error calling private method in rails 4.0
• #938 - Fix bug where non-standard foreign key names broke belongs_to associations
• #940 - When destroying versions to stay under version_limit, don't rely on the database to implicitly return the versions in the right order

6.0.2 (2016-12-13)

Breaking Changes

• None

Added

• None

Fixed

• 88e513f - Surprise argument modification bug in where_object_changes
• c7efd62 - Column type-detection bug in where_object_changes
• #905 - Only invoke logger.warn if logger instance exists

Code Quality

• Improve Metrics/AbcSize from 30 to 22
• Improve Metrics/PerceivedComplexity from 10 to 9

6.0.1 (2016-12-04)

Breaking Changes

• None

Added

• None

Fixed

• Remove rails 3 features that are no longer supported, most notably, protected_attributes.

6.0.0 (2016-12-03)

Now with rails 5.1 support, and less model pollution! About 40 methods that were polluting your models' namespaces have been removed, reducing the chances of a name conflict with your methods.

Breaking Changes

• #898 - Dropped support for rails 3
• #864 - The model methods deprecated in 5.2.0 have been removed. Use paper_trail.x instead of x.
• #861 - timestamp_field= removed without replacement. It is no longer configurable. The timestamp field in the versions table must now be named created_at.

Deprecated

• None

Added

• #900 - Support for rails 5.1
• #881 - Add RSpec matcher have_a_version_with_changes for easier testing.

Fixed

• None

5.2.3 (2016-11-29)

Breaking Changes

• None

Deprecated

• None

Added

• None

Fixed

• #889 - Fix warning message in instances when a version can't be persisted due to validation errors.
• #868 Fix usage of find_by_id when primary key is not id, affecting reifying certain records.

5.2.2 (2016-09-08)

Breaking Changes

• None

Deprecated

• #863 - PaperTrail.timestamp_field= deprecated without replacement. See #861 for discussion.

Added

• None

Fixed

• None

5.2.1 (2016-09-02)

Breaking Changes

• None

Deprecated

• None

Added

• None

Fixed

• #857 - Fix deserialization of enums written by PT 4.
• #798 - Fix a rare bug with serialization of enums in rails 4.2 only when using touch_with_version.

5.2.0 (2016-06-27)

Breaking Changes

• None

Deprecated

• #719 - The majority of model methods. Use paper_trail.x instead of x. Why? Your models are a crowded namespace, and we want to get out of your way!

Added

• None

Fixed

• None

5.1.1 (2016-05-31)

Breaking Changes

• None

Added

• None

Fixed

• #813 - Warning for paper_trail_on_destroy(:after) for pre-releases of AR 5
• #651 - Bug with installing PT on MySQL <= 5.6

5.1.0 (2016-05-20)

Breaking Changes

• None

Added

• #809 - Print warning if version cannot be saved.

Fixed

• #812 - Issue with saving HABTM associated objects using accepts_nested_attributes_for
• #811 - Avoid unnecessary query in #record_destroy
• Improvements to documentation

5.0.1 (2016-05-04)

Breaking Changes

• None

Added

• None

Fixed

• #791 - A rare issue in applications that override warn.
• #789 - A potentially common issue, in applications with initializers that use versioned models.

5.0.0 (2016-05-02)

Breaking Changes

• #758 - PaperTrail.config.track_associations getter method removed, use track_associations? instead.
• #740 - PaperTrail.config.track_associations? now defaults to false
• #723 - PaperTrail.enabled= now affects all threads
• #556 / #301 - If you are tracking who is responsible for changes with whodunnit, be aware that PaperTrail no longer adds the set_paper_trail_whodunnit before_action for you. Please add this before_action to your ApplicationController to continue recording whodunnit. See the readme for an example.
• #683 / #682 - Destroy callback default changed to :before to accommodate ActiveRecord 5 option belongs_to_required_by_default and new Rails 5 default.

Added

• #771 - Added support for has_and_belongs_to_many associations
• #741 / #681 MySQL unicode support in migration generator
• #689 - Rails 5 compatibility
• Added a rails config option: config.paper_trail.enabled
• #503 - Support for reifying belongs_to associations.

Fixed

• #777 - Support HMT associations with :source option.
• #738 - Rare bug where a non-versioned STI parent caused changeset to return an empty hash.
• #731 - Map enums to database values before storing in object_changes column.
• #715 - Optimize post-rollback association reset.
• #701 / #699 - Cleaning old versions explicitly preserves the most recent versions instead of relying on database result ordering.
• #635 - A bug where it was not possible to disable PT when using a multi-threaded webserver.
• #584 - Fixed deprecation warning for Active Record after_callback / after_commit

4.2.0 (2016-05-31)

Breaking Changes

• None

Added

• #808 - Warn when destroy callback is set to :after with ActiveRecord 5 option belongs_to_required_by_default set to true.

Fixed

• None

4.1.0 (2016-01-30)

Known Issues

• Version changesets now store ENUM values incorrectly (as nulls). Previously the values were stored as strings. This only affects Rails 4, not Rails 5. See #926

Breaking Changes

• None

Added

• A way to control the order of AR callbacks. #614
• Added unversioned_attributes option to reify. #579

Fixed

• None

4.0.2 (2016-01-19)

Breaking Changes

• None

Added

• None

Fixed

• #696 / #697 Bind JSON query parameters in where_object and where_object_changes.

4.0.1 (2015-12-14)

Breaking Changes

• None

Added

• None

Fixed

• #636 - Should compile assets without a db connection
• #589 / #588 - Fixes timestamp for "create" versions

4.0.0 (2015-07-30)

This major release adds JSON column support in PostgreSQL, limited support for versioning associations, various new configuration options, and a year's worth of bug fixes. Thanks to everyone who helped test the two betas and two release candidates.

Breaking Changes

• Using a Rails initializer to reopen PaperTrail::Version or otherwise extend PaperTrail is no longer recommended. An alternative is described in the readme. See https://github.com/paper-trail-gem/paper_trail/pull/557 and https://github.com/paper-trail-gem/paper_trail/pull/492.
• If you depend on the RSpec or Cucumber helpers, you must require them in your test helper.
• #566 - Removed deprecated methods paper_trail_on and paper_trail_off. Use paper_trail_on! and paper_trail_off! instead.
• #458 - Version metadata (the :meta option) from AR attributes for create events will now save the current value instead of nil.
• #391 - object_changes value should dump to YAML as a normal Hash instead of an ActiveSupport::HashWithIndifferentAccess.
• #375 / #374 / #354 / #131 - Versions are now saved with an after_ callback, instead of a before_ callback. This ensures that the timestamp field for a version matches the corresponding timestamp in the model.
• 3da1f104 - PaperTrail.config and PaperTrail.configure are now identical: both return the PaperTrail::Config instance and also yield it if a block is provided.

Added

• #525 / #512 - Support for virtual accessors and redefined setter and getter methods.
• #518 - Support for querying against PostgreSQL's JSON and JSONB column types via PaperTrail::VersionConcern#where_object and PaperTrail::VersionConcern#where_object_changes
• #507 - New option: :save_changes controls whether or not to save changes to the object_changes column (if it exists).
• #500 - Support for passing an empty array to the on option (on: []) to disable all automatic versioning.
• #494 - The install generator will warn the user if the migration they are attempting to generate already exists.
• #484 - Support for PostgreSQL's JSONB Type for storing object and object_changes.
• #439 / #12 - Support for versioning associations (has many, has one, etc.) one level deep.
• #420 - Add VersionConcern#where_object_changes instance method; acts as a helper for querying against the object_changes column in versions table.
• #416 - Added a config option for enabling/disabling utilization of serialized_attributes for ActiveRecord, necessary because serialized_attributes has been deprecated in ActiveRecord version 4.2 and will be removed in version 5.0
• #399 - Add :dup argument for options hash to reify which forces a new model instance.
• #394 - Add RSpec matcher have_a_version_with for easier testing.
• #347 - Autoload ActiveRecord models in via a Rails::Engine when the gem is used with Rails.

Fixed

• #563 - Fixed a bug in touch_with_version so that it will still create a version even when the on option is, e.g. [:create].
• #541 - PaperTrail.config.enabled should be Thread Safe
• #451 - Fix reify method in context of model where the base class has a default scope, and the live instance is not scoped within that default scope.
• #440 - versions association should clear/reload after a transaction rollback.
• #438 - ModelKlass.paper_trail_enabled_for_model? should return false if has_paper_trail has not been declared on the class.
• #404 / #428 - model_instance.dup does not need to be invoked when examining what the instance looked like before changes were persisted, which avoids issues if a 3rd party has overriden the dup behavior. Also fixes errors occuring when a user attempts to update the inheritance column on an STI model instance in ActiveRecord 4.1.x
• #427 - Fix reify method in context of model where a column has been removed.
• #414 - Fix functionality ignore argument to has_paper_trail in ActiveRecord 4.
• #413 - Utilize RequestStore to ensure that the PaperTrail.whodunnit is set in a thread safe manner within Rails and Sinatra.
• #381 - Fix irb warning: can't alias context from irb_context. Rspec and Cucumber helpers should not be loaded by default, regardless of whether those libraries are loaded.
• #248 - In MySQL, to prevent truncation, generated migrations now use longtext instead of text.
• Methods handling serialized attributes should fallback to the currently set Serializer instead of always falling back to PaperTrail::Serializers::YAML.

Deprecated

• #479 - Deprecated originator method, use paper_trail_originator.

3.0.9

• #479 - Deprecated originator method in favor of paper_trail_originator Deprecation warning informs users that the originator of the methods will be removed in version 4.0. (Backported from v4)
• Updated deprecation warnings for Model.paper_trail_on and Model.paper_trail_off to have display correct version number the methods will be removed (4.0)

3.0.8

• #525 / #512 - Support for virtual accessors and redefined setter and getter methods.

3.0.7

• #404 / #428 - Fix errors occuring when a user attempts to update the inheritance column on an STI model instance in ActiveRecord 4.1.x

3.0.6

• #414 - Backport fix for ignore argument to has_paper_trail in ActiveRecord 4.

3.0.5

• #401 / #406 - PaperTrail::Version class is not loaded via a Rails::Engine, even when the gem is used within Rails. This feature has will be re-introduced in version 4.0.
• #398 - Only require the RSpec helper if RSpec::Core is required.

3.0.3

This version was yanked from RubyGems and has been replaced by version 3.0.5, which is almost identical, but does not eager load in the PaperTrail::Version class through a Rails::Engine when the gem is used on Rails since it was causing issues for some users.

• #386 - Fix eager loading of versions association with custom class name in ActiveRecord 4.1.
• #384 - Fix VersionConcern#originator instance method.
• #383 - Make gem compatible with ActiveRecord::Enum (available in ActiveRecord 4.1+).
• #380 / #377 - Add VersionConcern#where_object instance method; acts as a helper for querying against the object column in versions table.
• #373 - Fix default sort order for the versions association in ActiveRecord 4.1.
• #372 - Use Arel for SQL construction.
• #365 - VersionConcern#version_at should return nil when receiving a timestamp that occured after the object was destroyed.
• Expand PaperTrail::VERSION into a module, mimicking the form used by Rails to give it some additional modularity & versatility.
• Fixed VersionConcern#index instance method so that it conforms to using the primary key for ordering when possible.

3.0.2

• #357 - If a Version instance is reified and then persisted at that state, it's timestamp attributes for update should still get touched.
• #351 / #352 - PaperTrail::Rails::Controller should hook into all controller types, and should not get loaded unless ActionController is.
• #346 - user_for_paper_trail method should accommodate different types for return values from current_user method.
• #344 - Gem is now tested against MySQL and PostgreSQL in addition to SQLite.
• #317 / #314 - versions should default to ordering via the primary key if it is an integer to avoid timestamp comparison issues.
• PaperTrail::Cleaner.clean_versions! should group versions by PaperTrail.timestamp_field when deciding which ones to keep / destroy, instead of always grouping by the created_at field.
• If a Version instance is reified and then persisted at that state, it's source version (model_instance#version_association_name, usually model_instance#version) will get cleared since persisting it causes it to become the live instance.
• If destroy actions are tracked for a versioned model, invoking destroy on the model will cause the corresponding version that gets generated to be assigned as the source version (model_instance#version_association_name, usually model_instance#version).

3.0.1

• #340 - Prevent potential error encountered when using the InstallGenerator with Rails 4.1.0.rc1.
• #334 - Add small-scope whodunnit method to PaperTrail::Model::InstanceMethods.
• #329 - Add touch_with_version method to PaperTrail::Model::InstanceMethods, to allow for generating a version while touching a model.
• #328 / #326 / #307 - Model.paper_trail_enabled_for_model? and model_instance.without_versioning is now thread-safe.
• #316 - user_for_paper_trail should default to current_user.try(:id) instead of current_user (if current_user is defined).
• #313 - Make the Rails::Controller helper compatible with ActionController::API for compatibility with the rails-api gem.
• #312 - Fix RSpec with_versioning class level helper method.
• model_instance.without_versioning now yields the model_instance, enabling syntax like this: model_instance.without_versioning { |obj| obj.update(:name => 'value') }.
• Deprecated Model.paper_trail_on and Model.paper_trail_off in favor of bang versions of the methods. Deprecation warning informs users that the non-bang versions of the methods will be removed in version 4.0

3.0.0

• #305 - PaperTrail::VERSION should be loaded at runtime.
• #295 - Explicitly specify table name for version class when querying attributes. Prevents AmbiguousColumn errors on certain JOIN statements.
• #289 - Use ActiveSupport::Concern for implementation of base functionality on PaperTrail::Version class. Increases flexibility and makes it easier to use custom version classes with multiple ActiveRecord connections.
• #288 - Change all scope declarations to class methods on the PaperTrail::Version class. Fixes usability when PaperTrail::Version.abstract_class? == true.
• #287 - Support for PostgreSQL's JSON Type for storing object and object_changes.
• #281 - Rails::Controller helper will return false for the paper_trail_enabled_for_controller method if PaperTrail.enabled? == false.
• #280 - Don't track virtual timestamp attributes.
• #278 / #272 - Make RSpec and Cucumber helpers usable with Spork and Zeus.
• #273 - Make the only and ignore options accept Hash arguments; allows for conditional tracking.
• #264 - Allow unwrapped symbol to be passed in to the on option.
• #224/#236 - Fixed compatibility with ActsAsTaggableOn.
• #235 - Dropped unnecessary secondary sort on versions association.
• #216 - Added helper & extension for RSpec, and helper for Cucumber.
• #212 - Added PaperTrail::Cleaner module, useful for discarding draft versions.
• #207 - Versions for 'create' events are now created with create! instead of create so that an exception gets raised if it is appropriate to do so.
• #199 - Rails 4 compatibility.
• #165 - Namespaced the Version class under the PaperTrail module.
• #119 - Support for Sinatra; decoupled gem from Rails.
• Renamed the default serializers from PaperTrail::Serializers::Yaml and PaperTrail::Serializers::Json to the capitalized forms, PaperTrail::Serializers::YAML and PaperTrail::Serializers::JSON.
• Removed deprecated set_whodunnit method from Rails Controller scope.

2.7.2

• #228 - Refactored default user_for_paper_trail method implementation so that current_user only gets invoked if it is defined.
• #219 - Fixed issue where attributes stored with nil value might not get reified properly depending on the way the serializer worked.
• #213 - Added a version_limit option to the PaperTrail::Config options that can be used to restrict the number of versions PaperTrail will store per object instance.
• #187 - Confirmed JRuby support.
• #174 - The event field on the versions table can now be customized.

2.7.1

• #206 - Fixed Ruby 1.8.7 compatibility for tracking object_changes.
• #200 - Fixed next_version method so that it returns the live model when called on latest reified version of a model prior to the live model.
• #197 - PaperTrail now falls back on using YAML for serialization of serialized model attributes for storage in the object and object_changes columns in the Version table. This fixes compatibility for Rails 3.0.x for projects that employ the serialize declaration on a model.
• #194 - A JSON serializer is now included in the gem.
• #192 - object_changes should store serialized representation of serialized attributes for create actions (in addition to update actions, which had already been patched by #180).
• #190 - Fixed compatibility with SerializedAttributes gem.
• #189 - Provided support for a configure block initializer.
• Added setter method for the serializer config option.

2.7.0

• #183 - Fully qualify the Version class to help prevent namespace resolution errors within other gems / plugins.
• #180 - Store serialized representation of serialized attributes on the object and object_changes columns in the Version table.
• #164 - Allow usage of custom serializer for storage of object attributes.

2.6.4

• #181/#182 - Controller metadata methods should only be evaluated when paper_trail_enabled_for_controller == true.
• #177/#178 - Factored out version_key into it's own method to prevent ConnectionNotEstablished error from getting thrown in instances where has_paper_trail is declared on class prior to ActiveRecord establishing a connection.
• #176 - Force metadata calls for attributes to use current value if attribute value is changing.
• #173 - Update link to diff-lcs.
• #172 - Save object_changes on creation.
• #168 - Respect conditional :if or :unless arguments to the has_paper_trail method for destroy events.
• #167 - Fix originator method so that it works with subclasses and STI.
• #160 - Fixed failing tests and resolved out of date dependency issues.
• #157 - Refactored class_attribute names on the ClassMethods module for names that are not obviously pertaining to PaperTrail to prevent method name collision.