Dmitry
1ab5071345
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81 lines
3.1 KiB
Dart
81 lines
3.1 KiB
Dart
import 'package:drift/drift.dart';
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import 'package:drift_postgres/drift_postgres.dart';
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import '../converters.dart' show generateUuid, StringListConverter, JsonListConverter;
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import 'users.dart';
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/// Таблица DiscountCampaigns - кампании скидок
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class DiscountCampaigns extends Table {
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// ID как String, но фактически UUID (генерируется PostgreSQL на стороне БД)
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TextColumn get id => text()
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.withDefault(const CustomExpression('gen_random_uuid()::text'))();
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TextColumn get name => text().nullable()();
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Column<PgDateTime> get start => customType(PgTypes.timestampWithTimezone)();
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Column<PgDateTime> get finish => customType(PgTypes.timestampWithTimezone)();
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// Статус (enum as string)
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TextColumn get status => text()(); // created, active, expired, disabled
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// Теги (JSON array)
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TextColumn get tags => text()
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.withDefault(const Constant('[]'))
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.map(const StringListConverter())();
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// Audit
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Column<PgDateTime> get createdAt => customType(PgTypes.timestampWithTimezone)
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.withDefault(now())();
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Column<PgDateTime> get updatedAt => customType(PgTypes.timestampWithTimezone)
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.withDefault(now())();
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BoolColumn get isDeleted => boolean()
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.withDefault(const Constant(false))
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.customConstraint('')(); // PostgreSQL использует нативный BOOLEAN
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@override
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Set<Column> get primaryKey => {id};
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}
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/// Таблица Discounts - скидки
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class Discounts extends Table {
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// ID как String, но фактически UUID (генерируется PostgreSQL на стороне БД)
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TextColumn get id => text()
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.withDefault(const CustomExpression('gen_random_uuid()::text'))();
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TextColumn get campaignId => text()
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.references(DiscountCampaigns, #id, onDelete: KeyAction.cascade)();
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// Процент скидки (0-100)
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RealColumn get discountPercent => real()();
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// Продукты (JSON array)
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TextColumn get products => text()
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.withDefault(const Constant('[]'))
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.map(const JsonListConverter())();
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// Audit
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Column<PgDateTime> get createdAt => customType(PgTypes.timestampWithTimezone)
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.withDefault(now())();
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Column<PgDateTime> get updatedAt => customType(PgTypes.timestampWithTimezone)
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.withDefault(now())();
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BoolColumn get isDeleted => boolean()
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.withDefault(const Constant(false))
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.customConstraint('')(); // PostgreSQL использует нативный BOOLEAN
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@override
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Set<Column> get primaryKey => {id};
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}
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/// Junction table для связи Discounts ↔ UserDatas (many-to-many)
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class DiscountUserDatas extends Table {
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TextColumn get discountId => text()
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.references(Discounts, #id, onDelete: KeyAction.cascade)();
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TextColumn get userId => text()
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.references(Users, #id, onDelete: KeyAction.cascade)();
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Column<PgDateTime> get grantedAt => customType(PgTypes.timestampWithTimezone)
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.withDefault(now())();
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@override
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Set<Column> get primaryKey => {discountId, userId};
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}
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// Конвертеры импортированы из converters.dart
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