angel3_orm_postgres 8.4.0

PostgreSQL support for Angel3 ORM. Includes functionality for querying and transactions.

Angel3 ORM for PostgreSQL

Angel3 ORM for working with PostgreSQL database 12 or later.

For documentation about the ORM, see Developer Guide

Migrating to 8.1.0 and above

postgres has been upgraded from 2.x.x to 3.x.x since version 8.1.0. This is a breaking change as postgres 3.x.x has revamped its API. Therefore when upgrading to 8.1.0 and beyond, the PostgreSQL connection settings need to be migrated. The rest should remain the same. Please see the example for the new PostgreSQL connection settings.

Usage

1. Create a model, i.e. car.dart

    import 'package:angel3_migration/angel3_migration.dart';
    import 'package:angel3_orm/angel3_orm.dart';
    import 'package:angel3_serialize/angel3_serialize.dart';
    import 'package:optional/optional.dart';
       
    part 'car.g.dart';
   
    @serializable
    @orm
    class CarEntity extends Model {
        String? make;
        String? description;
        bool? familyFriendly;
        DateTime? recalledAt;
        double? price;
    }
   

2. Run the following command to generate the required .g.dart file for the model.

   dart run build_runner build
   

3. Write the query program. i.e. CarPersistence.dart

   import 'package:angel3_migration_runner/angel3_migration_runner.dart';
   import 'package:angel3_orm/angel3_orm.dart';
   import 'package:logging/logging.dart';
   import 'package:postgres/postgres.dart';
   import 'models/car.dart';
   
   void main() async {
      
       // Setup the connections
       final conn = await Connection.open(
           Endpoint(
               host: 'localhost',
               port: 5432,
               database: 'postgres',
               username: 'postgres',
               password: 'postgres'),
           settings: ConnectionSettings(sslMode: SslMode.disable));
   
       var executor = PostgreSqlExecutor(conn);
   
       // Create the `Car` table
       var runner = PostgresMigrationRunner(conn, migrations: [CarMigration()]);
       await runner.up();
   
       var query = CarQuery();
       query.values
           ..make = 'Ferrari'
           ..description = 'Vroom vroom!'
           ..price = 1200000.00
           ..familyFriendly = false;
          
       // insert a new record into the `cars` table
       var ferrari = (await query.insert(executor)).value;
   }