method

instance_method_already_implemented?

v2.3.8 - Show latest stable - 0 notes - Class: ActiveRecord::AttributeMethods::ClassMethods

instance_method_already_implemented?(method_name) public

Checks whether the method is defined in the model or any of its subclasses that also derive from Active Record. Raises DangerousAttributeError if the method is defined by Active Record though.

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# File activerecord/lib/active_record/attribute_methods.rb, line 99
      def instance_method_already_implemented?(method_name)
        method_name = method_name.to_s
        return true if method_name =~ /^id(=$|\?$|$)/
        @_defined_class_methods         ||= ancestors.first(ancestors.index(ActiveRecord::Base)).sum([]) { |m| m.public_instance_methods(false) | m.private_instance_methods(false) | m.protected_instance_methods(false) }.map(&:to_s).to_set
        @@_defined_activerecord_methods ||= (ActiveRecord::Base.public_instance_methods(false) | ActiveRecord::Base.private_instance_methods(false) | ActiveRecord::Base.protected_instance_methods(false)).map(&:to_s).to_set
        raise DangerousAttributeError, "#{method_name} is defined by ActiveRecord" if @@_defined_activerecord_methods.include?(method_name)
        @_defined_class_methods.include?(method_name)
      end

instance_method_already_implemented?

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