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Added new Base.find API and deprecated find_all, find_first. Added preliminary support for eager loading of associations

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Added a join parameter as the third argument to Base.find_first and as the second to Base.count #426, #988 [skaes@web.de]

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Fixed bug in Base#hash method that would treat records with the same string-based id as different [Dave Thomas]

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Fixed that AR exists?() would explode on postgresql if the passed id did not match the PK type #900 [Scott Barron]

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Added adapter independent limit clause as a two-element array with the first being the limit, the second being the offset #795 [Sam Stephenson]

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Added alias_method :to_param, :id to Base, such that Active Record objects to be used as URL parameters in Action Pack automatically #812 [Nicholas Seckar/Sam Stephenson]

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Added type conversion before saving a record, so string-based values like "10.0" arent left for the database to convert #820 [dave@cherryville.org]

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Added Base.exists?(id) that'll return true if an object of the class with the given id exists #854 [stian@grytoyr.net]

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Fixed that symbols can be used on attribute assignment, like page.emails.create(:subject => data.subject, :body => data.body)

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Added ActiveRecord::Base.colorize_logging to control whether to use colors in logs or not (on by default)

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Fixed rails_generator to be usable without RubyGems #686 [Cristi BALAN]. Moved all active support dependencies into active support

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Optimized the SQL used to generate has_and_belongs_to_many queries by listing the join table first #693 [yerejm]

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Fixed that the dynamic finder like find_all_by_something_boolean(false) didn't work #649 [lmarlow@yahoo.com]

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Added the option of supplying an array of ids and attributes to Base#update, so that multiple records can be updated at once (inspired by #526/Duane Johnson). Added the option of supplying an array of attributes to Base#create, so that multiple records can be created at once. Added that Base#delete and Base#destroy both can take an array of ids to delete/destroy #336. Added that has_many association build and create methods can take arrays of record data like Base#create and Base#build to build/create multiple records at once.

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Added Base.update_collection that can update an array of id/attribute pairs, such as the ones produced by the recent added support for automatic id-based indexing for lists of items #526 [Duane Johnson]

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Added that update_all calls sanitize_sql on its updates argument, so stuff like MyRecord.update_all(['time = ?', Time.now]) works #519 [notahat]

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Fixed that the dynamic finders didnt treat nil as a "IS NULL" but rather "= NULL" case #515 [Demetrius]

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Added that has_and_belongs_to_many associations with additional attributes also can be created between unsaved objects and only committed to the database when Base#save is called on the associator #524 [Eric Anderson]

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Fixed that records fetched with piggy-back attributes or through rich has_and_belongs_to_many associations couldn't be saved due to the extra attributes not part of the table #522 [Eric Anderson]

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Added mass-assignment protection for the inheritance column -- regardless of a custom column is used or not

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Fixed that association proxies would fail === tests like PremiumSubscription === @account.subscription

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