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Moved build_association and create_association for has_one and belongs_to out of deprecation as they work when the association is nil unlike association.build and association.create, which require the association to be already in place #864

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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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Automatically extend the class which gets a module included with the ClassMethods module if it exists #970 [Lucas Carlson]

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Added that model.items.delete(child) will delete the child, not just set the foreign key to nil, if the child is dependent on the model #978 [bitsweat]

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Fixed that :counter_cache option would look for a line_items_count column for a LineItem object instead of lineitems_count

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Added destruction of dependent objects in has_one associations when a new assignment happens #742 [mindel]

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The create and build methods are only available for has_one/belongs_to if an association already exist. It will not work when it's nil. Updated the documentation to reflect that.

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Fixed that the belongs_to and has_one proxy would fail a test like 'if project.manager' -- this unfortunately also means that you can't call methods like project.manager.build unless there already is a manager on the project #492 [Tim Bates]

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Added replace to associations, so you can do project.manager.replace(new_manager) or project.milestones.replace(new_milestones) #402 [Tim Bates]
Added build and create methods to has_one and belongs_to associations, so you can now do project.manager.build(attributes) #402 [Tim Bates]
Fixed that Base#== wouldn't work for multiple references to the same unsaved object #402 [Tim Bates]
Added that if a before_* callback returns false, all the later callbacks and the associated action are cancelled. If an after_* callback returns false, all the later callbacks are cancelled. Callbacks are generally run in the order they are defined, with the exception of callbacks defined as methods on the model, which are called last. #402 [Tim Bates]

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Fixed that foreign keys named the same as the association would cause stack overflow #437 [Eric Anderson]

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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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Fixed that the const_missing autoload assumes the requested constant is set by require_association and calls const_get to retrieve it. If require_association did not set the constant then const_get will call const_missing, resulting in an infinite loop #380 [bitsweat]

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Added a require_association hook on const_missing that makes it possible to use any model class without requiring it first. Added that Active Record associations are now reloaded instead of cleared to work with the new const_missing hook in Active Record.

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

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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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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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