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superclass_delegating_accessor has been deprecated.

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I am working on removing all traces of superclass_delegating_accessor from rails code base.

https://rails.lighthouseapp.com/projects/8994/tickets/2914-superclass_delegating_accessor-needs-to-be-deprecated-nicely
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Neeraj Singh
2010-07-28 21:43:29 -04:00
parent f46e841f72
commit c2341ee71a
1 changed files with 0 additions and 15 deletions
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15
railties/guides/source/active_support_core_extensions.textile
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@@ -1135,21 +1135,6 @@ Since values are copied when a subclass is defined, if the base class changes th
NOTE: Defined in +active_support/core_ext/class/inheritable_attributes.rb+.
There's a related macro called +superclass_delegating_accessor+, however, that does not copy the value when the base class is subclassed. Instead, it delegates reading to the superclass as long as the attribute is not set via its own writer. For example, +ActionMailer::Base+ defines +delivery_method+ this way:
<ruby>
module ActionMailer
class Base
superclass_delegating_accessor :delivery_method
self.delivery_method = :smtp
end
end
</ruby>
If for whatever reason an application loads the definition of a mailer class and after that sets +ActionMailer::Base.delivery_method+, the mailer class will still see the new value. In addition, the mailer class is able to change the +delivery_method+ without affecting the value in the parent using its own inherited class attribute writer.
NOTE: Defined in +active_support/core_ext/class/delegating_attributes.rb+.
h4. Subclasses & Descendants
h5. +subclasses+