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Send the correct INSERT statement when dealing with objects with only primary keys.  Closes #9523 [tarmo]


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Fix that ActiveRecord would create attribute methods and override custom attribute getters if the method is also defined in Kernel.methods. [Rick]

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Don't call attr_readonly on polymorphic belongs_to associations, in case it matches the name of some other non-ActiveRecord class/module.  [Rick]

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Disabling auto_flushing still flushes when the buffer hits a maximum size, as a failsafe against memory-gobbling.

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Tidy up framework initialization code to ensure that it doesn't add folders to the load path that it doesn't intend to require.

Work around mongrel swallowing LoadErrors to ensure that users get more helpful errors if active_resource is required but not missing.  [mislav] Closes #9743


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Hash#to_json takes :only or :except options to specific or omit certain hash keys. Enumerable#to_json passes through its options to each element. Closes #9751.

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Try loading activerecord-<adaptername>-adapter gem before trying a plain require so you can use custom gems for the bundled adapters. Also stops gems from requiring an adapter from an old Active Record gem.

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Explicitly convert the buffer array to a string before writing to head off compatibility issues with outputs that don't fully quack like an IO.

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BufferedLogger#auto_flushing = N flushes the log every N messages. Buffers with an array instead of string.

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Use #require_library_or_gem to load the memcache library for the MemCache session and fragment cache stores.  Closes #8662. [Rick]

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Move ActionController::Routing.optimise_named_routes to ActionController::Base.optimise_named_routes.  Now you can set it in the config.
ActionController::Routing::DynamicSegment#interpolation_chunk should call #to_s on all values before calling URI.escape.  [Rick]

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db:create works with remote databases whereas db:create:all only createsdatabases on localhost. Closes #9753.

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Fixed Date#xmlschema for dates outside the range of what can be created with Time (closes #9744) [gbuesing]

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Removed calls to fixtures in generated tests as fixtures :all is now present by default in test_helper.rb [DHH]

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