- persisted? is the API defined in ActiveModel
- makes it easier for extension libraries to conform to ActiveModel APIs
  without concern for whether the extended object is specifically
  ActiveRecord

[#5927 state:committed]
Signed-off-by: NSantiago Pastorino <santiago@wyeworks.com>

Signed-off-by: Nwycats <wycats@gmail.com>

Break up DependencyModule's dual function of providing a "depend_on" DSL and "included" block DSL into separate modules. But, unify both approaches under AS::Concern.

Signed-off-by: NMichael Koziarski <michael@koziarski.com>
[#892 state:committed]

Signed-off-by: NMichael Koziarski <michael@koziarski.com>

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

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


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Ruby 1.9 compat: introduce ActiveSupport::FrozenObjectError normalize TypeError vs RuntimeError handling. Closes #10645 [Frederick Cheung]


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Assigning an instance of a foreign class to a composed_of aggregate calls an optional conversion block. Refactor and simplify composed_of implementation. Closes #6322.


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Formatting, grammar and spelling fixes for the associations documentation. [seanhussey] Closes #8899


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Backed out of new_record? to new? transformation as it would screw up existing models that did boolean calls on "new" attributes [DHH]

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Deprecated ActiveRecord::Base.new_record? in favor of ActiveRecord::Base.new? (old version still works until Rails 2.0) [DHH]

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Added preliminary support for join models [DHH] Added preliminary support for polymorphic associations [DHH] Refactored associations to use reflections to get DRYer, beware, major refactoring -- double check before deploying anything with this (all tests pass, but..)

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