build(attributes = {}, options = {}, &block) public

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# File activerecord/lib/active_record/associations/collection_association.rb, line 96
      def build(attributes = {}, options = {}, &block)
        if attributes.is_a?(Array)
          attributes.collect { |attr| build(attr, options, &block) }
        else
          add_to_target(build_record(attributes, options)) do |record|
            yield(record) if block_given?
          end
        end
      end
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