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https://api.rubyonrails.org/classes/ActiveSupport/Concern.html
end end end module Bar extend ActiveSupport::Concern include Foo included do self.method_injected_by_foo end end class Host include Bar # It works, now Bar takes care of its dependencies end Methods C
https://api.rubyonrails.org/v5.1/classes/ActiveSupport/Concern.html
end end end module Bar extend ActiveSupport::Concern include Foo included do self.method_injected_by_foo end end class Host include Bar # It works, now Bar takes care of its dependencies end Methods A
http://engineering.appfolio.com/appfolio-engineering/2013/06/17/ruby-mixins-activesupportconcern
Jun 17, 2013 · So far ActiveSupport::Concern has taken away some of the boilerplate code used in the pattern: no need to define an included hook, no need to extend the target class with ClassMethods, no need to class_eval on the target class. The last thing that ActiveSupport::Concern does is what I …
https://stackoverflow.com/questions/14928176/rails-activesuppportconcern-and-private-methods
Rails ActiveSuppport:Concern and Private Methods. And it's also a good idea to make very small methods that are not part of a public API. Without using concerns, those become private methods in a ruby …
https://rubygems.org/gems/yard-activesupport-concern
yard-activesupport-concern 0.0.1 This is a YARD extension that brings support for modules making use of ActiveSupport::Concern. It makes YARD parse docstrings inside included and class_methods blocks and generate the proper documentation for them.
https://ruby-china.org/topics/19812
Mar 29, 2019 · ActiveSupport::Concern 被引入到 rails 根据这篇文章 put-chubby-models-on-a-diet-with-concerns 中这样一段话把它的意思说的很明白了： This concern can then be mixed into all the models that are taggable and you’ll have a single place to update the logic and reason about it.
https://rubygems.org/gems/activesupport/versions/5.0.0
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https://stackoverflow.com/q/54787224
Does ActiveSupport::Concern support a way to run a method before or after the object's constructed. e.g. to achieve something like Module Benchmarker extend ActiveSupport::Concern
http://blog.coreyhaines.com/2012/12/why-i-dont-use-activesupportconcern.html
So, ActiveSupport::Concern appears to have 2 functions: an alternate syntax ("sugar" is a matter of opinion, I personally think it is less useful than Ruby's) for specifying how a module gets included into a class; and, a complex dependency management system (which has absolutely nothing to do with the concept of concerns).
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