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Add AbstractAdapter#table_alias_for to create table aliases according to the rules of the current adapter. [Rick]

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Provide access to the underlying database connection with Adapter#raw_connection, allows the use of db-specific methods such as postgresql's lo_* . Closes #2090


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Remove broken attempts at handling columns with a a default of 'now()' in the postgresql adapter. Closes #2257


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Fixed HashWithIndifferentAccess#delete to work with both symbols and strings (closes #2176) [Caio Chassot]

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Added connection#current_database that'll return of the current database (only works in MySQL, SQL Server, and Oracle so far -- please help implement for the rest of the adapters) (closes #3663) [Tom ward]

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Nicer error message on has_many :through when :through reflection can not be found (closes #4042) [court3nay@gmail.com]

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Fixed that Migration#execute would have the table name prefix appended to its query (closes #4110) [mark.imbriaco@pobox.com]

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Alias the has_and_belongs_to_many join table on eager includes. closes #4106 [jeremyevans0@gmail.com]

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Added protection against proxy setups treating requests as local even when they're not #3898 [stephen_purcell@yahoo.com]

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Change LEFT OUTER JOIN authors AS authors to LEFT OUTER JOIN authors authors so associations will work for Oracle again (closes #4231) [schoenm@earthlink.net]

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fix test_find_in_association_with_options test, tweak other tests affected by developer/project addition

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Added TestRequest#raw_post that simulate raw_post from CgiRequest (closes #3042) [francois.beausoleil@gmail.com]

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Added Time#advance to do precise time time calculations for cases where a month being approximated to 30 days won't do (closes #1860) [Rick Olson]

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Added Base.abstract_class? that marks which classes are not part of the Active Record hierarchy.  closes #3704

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Time#xmlschema is only available when you've required 'time'.  Add a unit test to catch regressions. [Koz]

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Fixes a bug in routes controller traversing which caused it to fail on for double nested controllers. [Tobias Luetke]

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