method

new

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new(attributes = nil, &block) public

Determines if one of the attributes passed in is the inheritance column, and if the inheritance column is attr accessible, it initializes an instance of the given subclass instead of the base class.

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# File activerecord/lib/active_record/inheritance.rb, line 50
      def new(attributes = nil, &block)
        if abstract_class? || self == Base
          raise NotImplementedError, "#{self} is an abstract class and cannot be instantiated."
        end

        if has_attribute?(inheritance_column)
          subclass = subclass_from_attributes(attributes)

          if subclass.nil? && scope_attributes = current_scope&.scope_for_create
            subclass = subclass_from_attributes(scope_attributes)
          end

          if subclass.nil? && base_class?
            subclass = subclass_from_attributes(column_defaults)
          end
        end

        if subclass && subclass != self
          subclass.new(attributes, &block)
        else
          super
        end
      end

new

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