index_name(table_name, options) public

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# File activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb, line 565
      def index_name(table_name, options) #:nodoc:
        if Hash === options
          if options[:column]
            "index_#{table_name}_on_#{Array(options[:column]) * '_and_'}"
          elsif options[:name]
            options[:name]
          else
            raise ArgumentError, "You must specify the index name"
          end
        else
          index_name(table_name, :column => options)
        end
      end
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