Signed-off-by: NPratik Naik <pratiknaik@gmail.com>

Base#instantiate_time_object: eliminate check for Time.zone, since we can assume this is set if time_zone_aware_attributes is set to true

Added block-setting of attributes for Base.create like Base.new already has (Adam Meehan) [#39 state:resolved]

Fixed that pessimistic locking you reference the quoted table name (Josh Susser) [#67 state:resolved]

Fixed that change_column should be able to use :null => true on a field that formerly had false [Nate Wiger] [#26 state:resolved]

Added that the MySQL adapter should map integer to either smallint, int, or bigint depending on the :limit just like PostgreSQL [DHH]

Revert "Ensure that save on child object fails for invalid belongs_to association. Closes #11555. [rubyruy]"

This reverts commit c67e9859.

Change validates_uniqueness_of :case_sensitive option default back to true (from [9160]).  Love your database columns, don't LOWER them.  [rick]

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Add support for interleaving migrations by storing which migrations have run in the new schema_migrations table. Closes #11493 [jordi]

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Refactor HasManyThroughAssociation to inherit from HasManyAssociation. Association callbacks and <association>_ids= now work with hm:t. Closes #11516 [rubyruy]


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Tweak ActiveRecord::Base#to_json to include a root value in the returned hash: {post: {title: ...}} [rick]

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Add efficient #include? to AssociationCollection (for has_many/has_many :through/habtm).  [stopdropandrew]

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Partial updates include only unsaved attributes. Off by default; set YourClass.partial_updates = true to enable.


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Switched to UTC-timebased version numbers for migrations and the schema. This will as good as eliminate the problem of multiple migrations getting the same version assigned in different branches. Also added rake db:migrate:up/down to apply individual migrations that may need to be run when you merge branches (closes #11458) [jbarnette]

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Fix issue where the :uniq option of a has_many :through association is ignored when find(:all) is called.  Closes #9407 [cavalle]

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Fix duplicate table alias error when including an association with a has_many :through association on the same join table.  Closes #7310 [cavalle]

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More efficient association preloading code that compacts a through_records array in a central location.  Closes #11427 [danger]

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Fixed that ActiveRecord#Base.find_or_create/initialize would not honor attr_protected/accessible when used with a hash (closes #11422) [miloops]

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Added ActiveRecord#Base.all/first/last as aliases for find(:all/:first/:last) (closes #11413) [nkallen, thechrisoshow]

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