method
inherited
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Class: ActiveRecord::Migration
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inherited(subclass)
public
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# File activerecord/lib/active_record/migration.rb, line 556 def self.inherited(subclass) # :nodoc: super if subclass.superclass == Migration major = ActiveRecord::VERSION::MAJOR minor = ActiveRecord::VERSION::MINOR raise StandardError, "Directly inheriting from ActiveRecord::Migration is not supported. " "Please specify the Active Record release the migration was written for:\n" "\n" " class #{subclass} < ActiveRecord::Migration[#{major}.#{minor}]" end end