type_condition

# File activerecord/lib/active_record/base.rb, line 1169
        def type_condition
          quoted_inheritance_column = connection.quote_column_name(inheritance_column)
          type_condition = subclasses.inject("#{table_name}.#{quoted_inheritance_column} = '#{name.demodulize}' ") do |condition, subclass|
            condition << "OR #{table_name}.#{quoted_inheritance_column} = '#{subclass.name.demodulize}' "
          end

          " (#{type_condition}) "
        end