platform/angel_orm/example/main.dart

import 'dart:async';

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

main() async {
  var query = new EmployeeQuery()
    ..where.firstName.equals('Rich')
    ..where.lastName.equals('Person')
    ..orWhere((w) => w.salary.greaterThanOrEqualTo(75000))
    ..join('companies', 'company_id', 'id');

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

class _FakeExecutor extends QueryExecutor {
  const _FakeExecutor();

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

  @override
  Future<T> transaction<T>(FutureOr<T> Function() f) {
    throw new UnsupportedError('Transactions are not supported.');
  }
}

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

  String get lastName;

  double get salary;
}

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

  @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
  Iterable<SqlExpressionBuilder> get expressionBuilders {
    return [id, firstName, lastName, salary, createdAt, updatedAt];
  }

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

  final StringSqlExpressionBuilder firstName =
      new StringSqlExpressionBuilder('first_name');

  final StringSqlExpressionBuilder lastName =
      new StringSqlExpressionBuilder('last_name');

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

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

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