*1.12.1*
 
* Always parenthesize :conditions options so they may be safely combined with STI and constraints.
 
* Correct PostgreSQL primary key sequence detection.  #2507 [tmornini@infomania.com]
 
* Added support for using limits in eager loads that involve has_many and has_and_belongs_to_many associations
 
*1.12.0* (October 16th, 2005)
 
* Update/clean up documentation (rdoc)
 
* PostgreSQL sequence support.  Use set_sequence_name in your model class to specify its primary key sequence.  #2292 [Rick Olson <technoweenie@gmail.com>, Robby Russell <robby@planetargon.com>]
 
* Change default logging colors to work on both white and black backgrounds. [Sam Stephenson]
 
* YAML fixtures support ordered hashes for fixtures with foreign key dependencies in the same table.  #1896 [purestorm@ggnore.net]
 
* :dependent now accepts :nullify option. Sets the foreign key of the related objects to NULL instead of deleting them. #2015 [Robby Russell <robby@planetargon.com>] 
 
* Introduce read-only records.  If you call object.readonly! then it will mark the object as read-only and raise ReadOnlyRecord if you call object.save.  object.readonly? reports whether the object is read-only.  Passing :readonly => true to any finder method will mark returned records as read-only.  The :joins option now implies :readonly, so if you use this option, saving the same record will now fail.  Use find_by_sql to work around.
 
* Avoid memleak in dev mode when using fcgi
 
* Simplified .clear on active record associations by using the existing delete_records method. #1906 [Caleb <me@cpb.ca>]
 
* Delegate access to a customized primary key to the conventional id method. #2444. [Blair Zajac <blair@orcaware.com>]
 
* Fix errors caused by assigning a has-one or belongs-to property to itself
 
* Add ActiveRecord::Base.schema_format setting which specifies how databases should be dumped [Sam Stephenson]
 
* Update DB2 adapter. #2206. [contact@maik-schmidt.de]
 
* Corrections to SQLServer native data types. #2267.  [rails.20.clarry@spamgourmet.com]
 
* Deprecated ActiveRecord::Base.threaded_connection in favor of ActiveRecord::Base.allow_concurrency.
 
* Protect id attribute from mass assigment even when the primary key is set to something else. #2438. [Blair Zajac <blair@orcaware.com>]
 
* Misc doc fixes (typos/grammar/etc.). #2430. [coffee2code]
 
* Add test coverage for content_columns. #2432. [coffee2code]
 
* Speed up for unthreaded environments. #2431. [skaes@web.de]
 
* Optimization for Mysql selects using mysql-ruby extension greater than 2.6.3.  #2426. [skaes@web.de]
 
* Speed up the setting of table_name. #2428. [skaes@web.de]
 
* Optimize instantiation of STI subclass records. In partial fullfilment of #1236. [skaes@web.de]
 
* Fix typo of 'constrains' to 'contraints'. #2069. [Michael Schuerig <michael@schuerig.de>]
 
* Optimization refactoring for add_limit_offset!. In partial fullfilment of #1236. [skaes@web.de]
 
* Add ability to get all siblings, including the current child, with acts_as_tree. Recloses #2140. [Michael Schuerig <michael@schuerig.de>]
 
* Add geometric type for postgresql adapter. #2233 [akaspick@gmail.com]
 
* Add option (true by default) to generate reader methods for each attribute of a record to avoid the overhead of calling method missing. In partial fullfilment of #1236. [skaes@web.de]
 
* Add convenience predicate methods on Column class. In partial fullfilment of #1236. [skaes@web.de]
 
* Raise errors when invalid hash keys are passed to ActiveRecord::Base.find. #2363  [Chad Fowler <chad@chadfowler.com>, Nicholas Seckar]
 
* Added :force option to create_table that'll try to drop the table if it already exists before creating
 
* Fix transactions so that calling return while inside a transaction will not leave an open transaction on the connection. [Nicholas Seckar]
 
* Use foreign_key inflection uniformly.  #2156 [Blair Zajac <blair@orcaware.com>]
 
* model.association.clear should destroy associated objects if :dependent => true instead of nullifying their foreign keys.  #2221 [joergd@pobox.com, ObieFernandez <obiefernandez@gmail.com>]
 
* Returning false from before_destroy should cancel the action.  #1829 [Jeremy Huffman]
 
* Recognize PostgreSQL NOW() default as equivalent to CURRENT_TIMESTAMP or CURRENT_DATE, depending on the column's type.  #2256 [mat <mat@absolight.fr>]
 
* Extensive documentation for the abstract database adapter.  #2250 [François Beausoleil <fbeausoleil@ftml.net>]
 
* Clean up Fixtures.reset_sequences for PostgreSQL.  Handle tables with no rows and models with custom primary keys.  #2174, #2183 [jay@jay.fm, Blair Zajac <blair@orcaware.com>]
 
* Improve error message when nil is assigned to an attr which validates_size_of within a range.  #2022 [Manuel Holtgrewe <purestorm@ggnore.net>]
 
* Make update_attribute use the same writer method that update_attributes uses.
 #2237 [trevor@protocool.com]
 
* Make migrations honor table name prefixes and suffixes. #2298 [Jakob S, Marcel Molina]
 
* Correct and optimize PostgreSQL bytea escaping.  #1745, #1837 [dave@cherryville.org, ken@miriamtech.com, bellis@deepthought.org]
 
* Fixtures should only reset a PostgreSQL sequence if it corresponds to an integer primary key named id.  #1749 [chris@chrisbrinker.com]
 
* Standardize the interpretation of boolean columns in the Mysql and Sqlite adapters. (Use MysqlAdapter.emulate_booleans = false to disable this behavior)
 
* Added new symbol-driven approach to activating observers with Base#observers= [DHH]. Example:
 
    ActiveRecord::Base.observers = :cacher, :garbage_collector
 
* Added AbstractAdapter#select_value and AbstractAdapter#select_values as convenience methods for selecting single values, instead of hashes, of the first column in a SELECT #2283 [solo@gatelys.com]
 
* Wrap :conditions in parentheses to prevent problems with OR's #1871 [Jamis Buck]
 
* Allow the postgresql adapter to work with the SchemaDumper. [Jamis Buck]
 
* Add ActiveRecord::SchemaDumper for dumping a DB schema to a pure-ruby file, making it easier to consolidate large migration lists and port database schemas between databases. [Jamis Buck]
 
* Fixed migrations for Windows when using more than 10 [David Naseby]
 
* Fixed that the create_x method from belongs_to wouldn't save the association properly #2042 [Florian Weber]
 
* Fixed saving a record with two unsaved belongs_to associations pointing to the same object #2023 [Tobias Luetke]
 
* Improved migrations' behavior when the schema_info table is empty. [Nicholas Seckar]
 
* Fixed that Observers didn't observe sub-classes #627 [Florian Weber]
 
* Fix eager loading error messages, allow :include to specify tables using strings or symbols. Closes #2222 [Marcel Molina]
 
* Added check for RAILS_CONNECTION_ADAPTERS on startup and only load the connection adapters specified within if its present (available in Rails through config.connection_adapters using the new config) #1958 [skae]
 
* Fixed various problems with has_and_belongs_to_many when using customer finder_sql #2094 [Florian Weber]
 
* Added better exception error when unknown column types are used with migrations #1814 [fbeausoleil@ftml.net]
 
* Fixed "connection lost" issue with the bundled Ruby/MySQL driver (would kill the app after 8 hours of inactivity) #2163, #428 [kajism@yahoo.com]
 
* Fixed comparison of Active Record objects so two new objects are not equal #2099 [deberg]
 
* Fixed that the SQL Server adapter would sometimes return DBI::Timestamp objects instead of Time #2127 [Tom Ward]
 
* Added the instance methods #root and #ancestors on acts_as_tree and fixed siblings to not include the current node #2142, #2140 [coffee2code]
 
* Fixed that Active Record would call SHOW FIELDS twice (or more) for the same model when the cached results were available #1947 [sd@notso.net]
 
* Added log_level and use_silence parameter to ActiveRecord::Base.benchmark. The first controls at what level the benchmark statement will be logged (now as debug, instead of info) and the second that can be passed false to include all logging statements during the benchmark block/
 
* Make sure the schema_info table is created before querying the current version #1903
 
* Fixtures ignore table name prefix and suffix #1987 [Jakob S]
 
* Add documentation for index_type argument to add_index method for migrations #2005 [blaine@odeo.com]
 
* Modify read_attribute to allow a symbol argument #2024 [Ken Kunz]
 
* Make destroy return self #1913 [sebastian.kanthak@muehlheim.de]
 
* Fix typo in validations documentation #1938 [court3nay]
 
* Make acts_as_list work for insert_at(1) #1966 [hensleyl@papermountain.org]
 
* Fix typo in count_by_sql documentation #1969 [Alexey Verkhovsky]
 
* Allow add_column and create_table to specify NOT NULL #1712 [emptysands@gmail.com]
 
* Fix create_table so that id column is implicitly added [Rick Olson]
 
* Default sequence names for Oracle changed to #{table_name}_seq, which is the most commonly used standard. In addition, a new method ActiveRecord::Base#set_sequence_name allows the developer to set the sequence name per model. This is a non-backwards-compatible change -- anyone using the old-style "rails_sequence" will need to either create new sequences, or set: ActiveRecord::Base.set_sequence_name = "rails_sequence" #1798
 
* OCIAdapter now properly handles synonyms, which are commonly used to separate out the schema owner from the application user #1798
 
* Fixed the handling of camelCase columns names in Oracle #1798
 
* Implemented for OCI the Rakefile tasks of :clone_structure_to_test, :db_structure_dump, and :purge_test_database, which enable Oracle folks to enjoy all the agile goodness of Rails for testing. Note that the current implementation is fairly limited -- only tables and sequences are cloned, not constraints or indexes. A full clone in Oracle generally requires some manual effort, and is version-specific. Post 9i, Oracle recommends the use of the DBMS_METADATA package, though that approach requires editing of the physical characteristics generated #1798
 
* Fixed the handling of multiple blob columns in Oracle if one or more of them are null #1798
 
* Added support for calling constrained class methods on has_many and has_and_belongs_to_many collections #1764 [Tobias Luetke]
 
    class Comment < AR:B
      def self.search(q)
        find(:all, :conditions => ["body = ?", q])
      end
    end 
 
    class Post < AR:B
      has_many :comments
    end
 
    Post.find(1).comments.search('hi') # => SELECT * from comments WHERE post_id = 1 AND body = 'hi'
  
  NOTICE: This patch changes the underlying SQL generated by has_and_belongs_to_many queries. If your relying on that, such as
  by explicitly referencing the old t and j aliases, you'll need to update your code. Of course, you _shouldn't_ be relying on
  details like that no less than you should be diving in to touch private variables. But just in case you do, consider yourself
  noticed :)
 
* Added migration support for SQLite (using temporary tables to simulate ALTER TABLE) #1771 [Sam Stephenson]
 
* Remove extra definition of supports_migrations? from abstract_adaptor.rb [Nicholas Seckar]
 
* Fix acts_as_list so that moving next-to-last item to the bottom does not result in duplicate item positions
 
* Fixed incompatibility in DB2 adapter with the new limit/offset approach #1718 [Maik Schmidt]
 
* Added :select option to find which can specify a different value than the default *, like find(:all, :select => "first_name, last_name"), if you either only want to select part of the columns or exclude columns otherwise included from a join #1338 [Stefan Kaes]
 
 
*1.11.1* (11 July, 2005)
 
* Added support for limit and offset with eager loading of has_one and belongs_to associations. Using the options with has_many and has_and_belongs_to_many associations will now raise an ActiveRecord::ConfigurationError #1692 [Rick Olsen]
 
* Fixed that assume_bottom_position (in acts_as_list) could be called on items already last in the list and they would move one position away from the list #1648 [tyler@kianta.com]
 
* Added ActiveRecord::Base.threaded_connections flag to turn off 1-connection per thread (required for thread safety). By default it's on, but WEBrick in Rails need it off #1685 [Sam Stephenson]
 
* Correct reflected table name for singular associations.  #1688 [court3nay@gmail.com]
 
* Fixed optimistic locking with SQL Server #1660 [tom@popdog.net]
 
* Added ActiveRecord::Migrator.migrate that can figure out whether to go up or down based on the target version and the current
 
* Added better error message for "packets out of order" #1630 [courtenay]
 
* Fixed first run of "rake migrate" on PostgreSQL by not expecting a return value on the id #1640
 
 
*1.11.0* (6 July, 2005)
 
* Fixed that Yaml error message in fixtures hid the real error #1623 [Nicholas Seckar]
 
* Changed logging of SQL statements to use the DEBUG level instead of INFO
 
* Added new Migrations framework for describing schema transformations in a way that can be easily applied across multiple databases #1604 [Tobias Luetke] See documentation under ActiveRecord::Migration and the additional support in the Rails rakefile/generator.
 
* Added callback hooks to association collections #1549 [Florian Weber]. Example:
 
    class Project
      has_and_belongs_to_many :developers, :before_add => :evaluate_velocity
    
      def evaluate_velocity(developer)
        ...
      end
    end 
  
  ..raising an exception will cause the object not to be added (or removed, with before_remove).
    
 
* Fixed Base.content_columns call for SQL Server adapter #1450 [DeLynn Berry]
 
* Fixed Base#write_attribute to work with both symbols and strings #1190 [Paul Legato]
 
* Fixed that has_and_belongs_to_many didn't respect single table inheritance types #1081 [Florian Weber]
 
* Speed up ActiveRecord#method_missing for the common case (read_attribute).
 
* Only notify observers on after_find and after_initialize if these methods are defined on the model.  #1235 [skaes@web.de]
 
* Fixed that single-table inheritance sub-classes couldn't be used to limit the result set with eager loading #1215 [Chris McGrath]
 
* Fixed validates_numericality_of to work with overrided getter-method when :allow_nil is on #1316 [raidel@onemail.at]
 
* Added roots, root, and siblings to the batch of methods added by acts_as_tree #1541 [michael@schuerig.de]
 
* Added support for limit/offset with the MS SQL Server driver so that pagination will now work #1569 [DeLynn Berry]
 
* Added support for ODBC connections to MS SQL Server so you can connect from a non-Windows machine #1569 [Mark Imbriaco/DeLynn Berry]
 
* Fixed that multiparameter posts ignored attr_protected #1532 [alec+rails@veryclever.net]
 
* Fixed problem with eager loading when using a has_and_belongs_to_many association using :association_foreign_key #1504 [flash@vanklinkenbergsoftware.nl]
 
* Fixed Base#find to honor the documentation on how :joins work and make them consistent with Base#count #1405 [pritchie@gmail.com]. What used to be:
 
    Developer.find :all, :joins => 'developers_projects', :conditions => 'id=developer_id AND project_id=1'
  
  ...should instead be:
  
    Developer.find(
      :all, 
      :joins => 'LEFT JOIN developers_projects ON developers.id = developers_projects.developer_id', 
      :conditions => 'project_id=1'
    )    
 
* Fixed that validations didn't respecting custom setting for too_short, too_long messages #1437 [Marcel Molina]
 
* Fixed that clear_association_cache doesn't delete new associations on new records (so you can safely place new records in the session with Action Pack without having new associations wiped) #1494 [cluon]
 
* Fixed that calling Model.find([]) returns [] and doesn't throw an exception #1379
 
* Fixed that adding a record to a has_and_belongs_to collection would always save it -- now it only saves if its a new record #1203 [Alisdair McDiarmid]
 
* Fixed saving of in-memory association structures to happen as a after_create/after_update callback instead of after_save -- that way you can add new associations in after_create/after_update callbacks without getting them saved twice
 
* Allow any Enumerable, not just Array, to work as bind variables #1344 [Jeremy Kemper]
 
* Added actual database-changing behavior to collection assigment for has_many and has_and_belongs_to_many #1425 [Sebastian Kanthak].
  Example:
 
    david.projects = [Project.find(1), Project.new("name" => "ActionWebSearch")]
    david.save
  
  If david.projects already contain the project with ID 1, this is left unchanged. Any other projects are dropped. And the new
  project is saved when david.save is called.
  
  Also included is a way to do assignments through IDs, which is perfect for checkbox updating, so you get to do:
  
    david.project_ids = [1, 5, 7]
 
* Corrected typo in find SQL for has_and_belongs_to_many.  #1312 [ben@bensinclair.com]
 
* Fixed sanitized conditions for has_many finder method.  #1281 [jackc@hylesanderson.com, pragdave, Tobias Luetke]
 
* Comprehensive PostgreSQL schema support.  Use the optional schema_search_path directive in database.yml to give a comma-separated list of schemas to search for your tables.  This allows you, for example, to have tables in a shared schema without having to use a custom table name.  See http://www.postgresql.org/docs/8.0/interactive/ddl-schemas.html to learn more.  #827 [dave@cherryville.org]
 
* Corrected @@configurations typo #1410 [david@ruppconsulting.com]
 
* Return PostgreSQL columns in the order they were declared #1374 [perlguy@gmail.com]
 
* Allow before/after update hooks to work on models using optimistic locking 
 
* Eager loading of dependent has_one associations won't delete the association #1212
 
* Added a second parameter to the build and create method for has_one that controls whether the existing association should be replaced (which means nullifying its foreign key as well). By default this is true, but false can be passed to prevent it.
 
* Using transactional fixtures now causes the data to be loaded only once.
 
* Added fixture accessor methods that can be used when instantiated fixtures are disabled.
 
    fixtures :web_sites
 
    def test_something
      assert_equal "Ruby on Rails", web_sites(:rubyonrails).name
    end
 
* Added DoubleRenderError exception that'll be raised if render* is called twice #518 [Nicholas Seckar]
 
* Fixed exceptions occuring after render has been called #1096 [Nicholas Seckar]
 
* CHANGED: validates_presence_of now uses Errors#add_on_blank, which will make "  " fail the validation where it didn't before #1309
 
* Added Errors#add_on_blank which works like Errors#add_on_empty, but uses Object#blank? instead
 
* Added the :if option to all validations that can either use a block or a method pointer to determine whether the validation should be run or not. #1324 [Duane Johnson/jhosteny]. Examples:
 
  Conditional validations such as the following are made possible:
    validates_numericality_of :income, :if => :employed?
 
  Conditional validations can also solve the salted login generator problem:
    validates_confirmation_of :password, :if => :new_password?
  
  Using blocks:
    validates_presence_of :username, :if => Proc.new { |user| user.signup_step > 1 }
 
* Fixed use of construct_finder_sql when using :join #1288 [dwlt@dwlt.net]
 
* Fixed that :delete_sql in has_and_belongs_to_many associations couldn't access record properties #1299 [Rick Olson]
 
* Fixed that clone would break when an aggregate had the same name as one of its attributes #1307 [Jeremy Kemper]
 
* Changed that destroying an object will only freeze the attributes hash, which keeps the object from having attributes changed (as that wouldn't make sense), but allows for the querying of associations after it has been destroyed.
 
* Changed the callbacks such that observers are notified before the in-object callbacks are triggered. Without this change, it wasn't possible to act on the whole object in something like a before_destroy observer without having the objects own callbacks (like deleting associations) called first.
 
* Added option for passing an array to the find_all version of the dynamic finders and have it evaluated as an IN fragment. Example:
 
    # SELECT * FROM topics WHERE title IN ('First', 'Second')
    Topic.find_all_by_title(["First", "Second"])
 
* Added compatibility with camelCase column names for dynamic finders #533 [Dee.Zsombor]
 
* Fixed extraneous comma in count() function that made it not work with joins #1156 [jarkko/Dee.Zsombor]
 
* Fixed incompatibility with Base#find with an array of ids that would fail when using eager loading #1186 [Alisdair McDiarmid]
 
* Fixed that validate_length_of lost :on option when :within was specified #1195 [jhosteny@mac.com]
 
* Added encoding and min_messages options for PostgreSQL #1205 [shugo]. Configuration example:
 
    development:
      adapter: postgresql
      database: rails_development
      host: localhost
      username: postgres
      password:
      encoding: UTF8
      min_messages: ERROR
 
* Fixed acts_as_list where deleting an item that was removed from the list would ruin the positioning of other list items #1197 [Jamis Buck]
 
* Added validates_exclusion_of as a negative of validates_inclusion_of
 
* Optimized counting of has_many associations by setting the association to empty if the count is 0 so repeated calls doesn't trigger database calls
 
 
*1.10.1* (20th April, 2005)
 
* Fixed frivilous database queries being triggered with eager loading on empty associations and other things
 
* Fixed order of loading in eager associations
 
* Fixed stray comma when using eager loading and ordering together from has_many associations #1143
 
 
*1.10.0* (19th April, 2005)
 
* Added eager loading of associations as a way to solve the N+1 problem more gracefully without piggy-back queries. Example:
 
    for post in Post.find(:all, :limit => 100)
      puts "Post:            " + post.title
      puts "Written by:      " + post.author.name
      puts "Last comment on: " + post.comments.first.created_on
    end
  
  This used to generate 301 database queries if all 100 posts had both author and comments. It can now be written as:
  
    for post in Post.find(:all, :limit => 100, :include => [ :author, :comments ])
 
  ...and the number of database queries needed is now 1.
 
* Added new unified Base.find API and deprecated the use of find_first and find_all. See the documentation for Base.find. Examples: