instance method `concern`

Ruby on Rails 6.0.6

Since v4.1.16

Available in: v4.1.16 v4.2.9 v5.2.8.1 v6.0.6 v6.1.7.10 v7.0.10 v7.1.6 v7.2.3 v8.0.4 v8.1.2

Compare with:

concern(topic, &module_definition)

A low-cruft shortcut to define a concern.

concern :EventTracking do
  ...
end

is equivalent to

module EventTracking
  extend ActiveSupport::Concern

  ...
end

Parameters

topic req
module_definition block

Source

# File activesupport/lib/active_support/core_ext/module/concerning.rb, line 126
    def concern(topic, &module_definition)
      const_set topic, Module.new {
        extend ::ActiveSupport::Concern
        module_eval(&module_definition)
      }
    end

Defined in activesupport/lib/active_support/core_ext/module/concerning.rb line 126 · View on GitHub · Improve this page · Find usages on GitHub

Defined in Module::Concerning

Signature

Parameters