type_map (DataMapper::Migrations::DataObjectsAdapter::ClassMethods)

    # File lib/dm-core/migrations.rb, line 301
            def type_map
              length    = Property::DEFAULT_LENGTH
              precision = Property::DEFAULT_PRECISION
              scale     = Property::DEFAULT_SCALE_BIGDECIMAL

              @type_map ||= {
                Integer       => { :primitive => 'INTEGER'                                           },
                String        => { :primitive => 'VARCHAR', :length => length                        },
                Class         => { :primitive => 'VARCHAR', :length => length                        },
                BigDecimal    => { :primitive => 'DECIMAL', :precision => precision, :scale => scale },
                Float         => { :primitive => 'FLOAT',   :precision => precision                  },
                DateTime      => { :primitive => 'TIMESTAMP'                                         },
                Date          => { :primitive => 'DATE'                                              },
                Time          => { :primitive => 'TIMESTAMP'                                         },
                TrueClass     => { :primitive => 'BOOLEAN'                                           },
                Types::Object => { :primitive => 'TEXT'                                              },
                Types::Text   => { :primitive => 'TEXT'                                              },
              }.freeze
            end