I have:
module MySpike
extend ActiveSupport::Concern
included do
class_attribute :foobar, instance_writer: true
end
end
But, I want to be able to override the class attribute writer and/or
instance writer method to do something when the attribute is set via
self.foobar = true before or after calling super to set the attribute.
Unfortunately, I can't find a clean way of doing this, and it is a little
confusing when the order of things is typically to put included at the top
even though it isn't evaluated before ClassMethods is extended, etc.
I'm not sure if it would help, but would be nice if the order of the
following that happen in Concern's def append_features(base) method were
different and maybe then I could just override things in the ClassMethods
module for class methods and the main block of the module for instance
methods:
super
base.extend const_get("ClassMethods") if
const_defined?("ClassMethods")
base.class_eval(&@_included_block) if
instance_variable_defined?("@_included_block")
And there are classes like this that only benefit from the dependency
handling and included block class_eval part of Concern that maybe could
benefit from that being split up somehow?:
actionpack/lib/abstract_controller/asset_paths.rb:
module AbstractController
module AssetPaths #:nodoc:
extend ActiveSupport::Concern
included do
config_accessor :asset_host, :asset_path, :assets_dir,
:javascripts_dir,
:stylesheets_dir, :default_asset_host_protocol, :relative_url_root
end
end
end
Sorry if this is an uninformed way of looking at it. I guess if it was
problematic it would have been solved already. Thanks for listening though.
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