Sean Griffin c587b63664 Ensure that records with unselected fields can be updated ... As part of refactoring mutation detection to be more performant, we introduced the concept of `original_value` to `Attribute`. This was not overridden in `Attribute::Uninitialized` however, so assigning ot an uninitialized value and calling `.changed?` would raise `NotImplementedError`. We are using a sentinel value rather than checking the result of `original_attribute.initialized?` in `changed?` because `original_value` might go through more than one node in the tree. Fixes #25228		2016-06-02 11:34:48 -04:00
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active_record	Ensure that records with unselected fields can be updated	2016-06-02 11:34:48 -04:00
rails/generators	…
active_record.rb	…