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Added dynamic attribute-based finders as a cleaner way of getting objects by simple queries without turning to SQL.

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Added that Base#find takes an optional options hash, including :conditions. Base#find_on_conditions deprecated in favor of #find with :conditions #407 [bitsweat]

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Added a db2 adapter that only depends on the Ruby/DB2 bindings (http://raa.ruby-lang.org/project/ruby-db2/) #386 [Maik Schmidt]. Converted all the fixtures to YAML style ones.

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Added Base.default_timezone accessor that determines whether to use Time.local (using :local) or Time.utc (using :utc) when pulling dates and times from the database. This is set to :local by default.

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Added the possibility for adapters to overwrite add_limit! to implement a different limiting scheme than "LIMIT X" used by MySQL, PostgreSQL, and SQLite.

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Fixed that Base.table_name would expect a parameter when used in has_and_belongs_to_many joins [Anna Lissa Cruz]

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Switched strategy on the id_before_type_cast problem and just did an explicit method so postgresql wouldnt choke on id is null

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Changed the interface on AbstractAdapter to require that adapters return the number of affected rows on delete and update operations. Added that Base.update_all and Base.delete_all return an integer of the number of affected rows #341

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Added respondence to *_before_type_cast for all attributes to return their string-state before they were type casted by the column type. Added use of *_before_type_cast for all input and text fields.

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Added Base#update_attributes that'll accept a hash of attributes and save the record (returning true if it passed validation, false otherwise). Added a return value for Base#update_attribute, so that you get to know whether the save was successful or if it failed validation.

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Fixed that Base#find will return an array if given an array -- regardless of the number of elements #270 [Marten]

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Added a better exception for when a type column is used in a table without the intention of triggering single-table inheritance. Added that single-table inheritance will only kick in if the inheritance_column (by default "type") is present. Otherwise, inheritance wont have any magic side effects

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Added methods for resetting the cached information on classes that you want to clear between requests in development mode

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Moved require_association to associations.rb and added methods for resetting the inheritable attributes on subclasses

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Added Base.validate_uniqueness thatv alidates whether the value of the specified attributes are unique across the system. Useful for making sure that only one user can be named "davidhh".

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Fixed value quoting in all generated SQL statements, so that integers are not surrounded in quotes and that all sanitation are happening through the database's own quoting routine. This should hopefully make it lots easier for new adapters that doesn't accept '1' for integer columns.

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Added bind-style variable interpolation for the condition arrays that uses the adapter's quote method [Michael Koziarski]

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Abolished ActionController::Base.require_or_load in favor of require_dependency and ActiveRecord::Base.require_or_load in favor of require_association. Both methods are now also available in the global namespace when you need to require dependencies or associations outside of whats done automatically.

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