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Use concerns to keep your models manageable (fix unscoped issue w/ trashed scope)

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gistfile1.rb
Ruby
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# autoload concerns
module YourApp
class Application < Rails::Application
config.autoload_paths += %W(
#{config.root}/app/controllers/concerns
#{config.root}/app/models/concerns
)
end
end
 
# app/models/concerns/trashable.rb
module Trashable
extend ActiveSupport::Concern
included do
default_scope where(trashed: false)
end
 
module ClassMethods
def trashed
unscoped.where(trashed: true)
end
end
 
module InstanceMethods
def trash
update_attribute :trashed, true
end
end
end
 
# app/models/message.rb
class Message < ActiveRecord::Base
include Trashable, Subscribable, Commentable, Eventable
end

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