platform/packages/orm/angel_migration/lib/src/table.dart

import 'package:angel_orm/angel_orm.dart';
import 'column.dart';

abstract class Table {
  MigrationColumn declareColumn(String name, Column column);

  MigrationColumn declare(String name, ColumnType type) =>
      declareColumn(name, new MigrationColumn(type));

  MigrationColumn serial(String name) => declare(name, ColumnType.serial);

  MigrationColumn integer(String name) => declare(name, ColumnType.int);

  MigrationColumn float(String name) => declare(name, ColumnType.float);

  MigrationColumn numeric(String name) => declare(name, ColumnType.numeric);

  MigrationColumn boolean(String name) => declare(name, ColumnType.boolean);

  MigrationColumn date(String name) => declare(name, ColumnType.date);

  @deprecated
  MigrationColumn dateTime(String name) => timeStamp(name, timezone: true);

  MigrationColumn timeStamp(String name, {bool timezone: false}) {
    if (timezone != true) return declare(name, ColumnType.timeStamp);
    return declare(name, ColumnType.timeStampWithTimeZone);
  }

  MigrationColumn text(String name) => declare(name, ColumnType.text);

  MigrationColumn varChar(String name, {int length}) {
    if (length == null) return declare(name, ColumnType.varChar);
    return declareColumn(
        name, new Column(type: ColumnType.varChar, length: length));
  }
}

abstract class MutableTable extends Table {
  void rename(String newName);
  void dropColumn(String name);
  void renameColumn(String name, String newName);
  void changeColumnType(String name, ColumnType type);
  void dropNotNull(String name);
  void setNotNull(String name);
}