build(attributes = nil, &block) public

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# File activerecord/lib/active_record/associations/collection_association.rb, line 104
      def build(attributes = nil, &block)
        if attributes.is_a?(Array)
          attributes.collect { |attr| build(attr, &block) }
        else
          add_to_target(build_record(attributes, &block), replace: true)
        end
      end
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