platform/angel_orm/example/main.dart

import 'package:angel_model/angel_model.dart';
import 'package:angel_orm/angel_orm.dart';
import 'package:angel_serialize/angel_serialize.dart';
part 'main.g.dart';
part 'main.serializer.g.dart';

main() async {
  var query = new EmployeeQuery();
  query.where
    ..firstName.equals('Rich')
    ..lastName.equals('Person')
    ..or(new EmployeeQueryWhere()..salary.greaterThanOrEqualTo(75000));

  var richPerson = await query.getOne(new _FakeExecutor());
  print(richPerson.toJson());
}

class _FakeExecutor extends QueryExecutor {
  const _FakeExecutor();

  @override
  Future<List<List>> query(String query) async {
    var now = new DateTime.now();
    print('_FakeExecutor received query: $query');
    return [
      [1, 'Rich', 'Person', 100000.0, now, now]
    ];
  }
}

@orm
@serializable
abstract class _Employee extends Model {
  String get firstName;

  String get lastName;

  double get salary;
}

class EmployeeQuery extends Query<Employee, EmployeeQueryWhere> {
  @override
  final EmployeeQueryWhere where = new EmployeeQueryWhere();

  @override
  String get tableName => 'employees';

  @override
  List<String> get fields =>
      ['id', 'first_name', 'last_name', 'salary', 'created_at', 'updated_at'];

  @override
  Employee deserialize(List row) {
    return new Employee(
        id: row[0].toString(),
        firstName: row[1] as String,
        lastName: row[2] as String,
        salary: row[3] as double,
        createdAt: row[4] as DateTime,
        updatedAt: row[5] as DateTime);
  }
}

class EmployeeQueryWhere extends QueryWhere {
  @override
  Map<String, SqlExpressionBuilder> get expressionBuilders {
    return {
      'id': id,
      'first_name': firstName,
      'last_name': lastName,
      'salary': salary,
      'created_at': createdAt,
      'updated_at': updatedAt
    };
  }

  final NumericSqlExpressionBuilder<int> id =
      new NumericSqlExpressionBuilder<int>();

  final StringSqlExpressionBuilder firstName = new StringSqlExpressionBuilder();

  final StringSqlExpressionBuilder lastName = new StringSqlExpressionBuilder();

  final NumericSqlExpressionBuilder<double> salary =
      new NumericSqlExpressionBuilder<double>();

  final DateTimeSqlExpressionBuilder createdAt =
      new DateTimeSqlExpressionBuilder('created_at');

  final DateTimeSqlExpressionBuilder updatedAt =
      new DateTimeSqlExpressionBuilder('updated_at');
}