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1131 lines
25 KiB
Markdown
1131 lines
25 KiB
Markdown
# Database
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NocoBase 内置的数据库访问类，通过封装 [Sequelize](https://sequelize.org/) 提供了更加简单的数据库访问接口和统一化的 JSON 数据库表配置方式，同时也提供了扩展字段类型和查询操作符的能力。
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Database 类继承自 EventEmitter，可以通过 `db.on('event', callback)` 监听数据库事件，以及 `db.off('event', callback)` 移除监听。
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## 包结构
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可通过以下方式引入相关实体：
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```ts
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import Database, {
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Field,
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Collection,
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Repository,
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RelationRepository,
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extend
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} from '@nocobase/database';
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```
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## 构造函数
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**签名**
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* `constructor(options: DatabaseOptions)`
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创建一个数据库实例。
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**参数**
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`options` 参数与 [Sequelize 的构造参数](https://sequelize.org/api/v6/class/src/sequelize.js~sequelize#instance-constructor-constructor)一致的部分会透传至 Sequelize，同时 NocoBase 也会使用一些额外的参数：
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| 参数名 | 类型 | 默认值 | 描述 |
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| --- | --- | --- | --- |
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| `options.host` | `string` | `'localhost'` | 数据库主机 |
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| `options.port` | `number` | - | 数据库服务端口，根据使用的数据库有对应默认端口 |
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| `options.username` | `string` | - | 数据库用户名 |
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| `options.password` | `string` | - | 数据库密码 |
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| `options.database` | `string` | - | 数据库名称 |
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| `options.dialect` | `string` | `'mysql'` | 数据库类型 |
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| `options.storage?` | `string` | `':memory:'` | SQLite 的存储模式 |
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| `options.logging?` | `boolean` | `false` | 是否开启日志 |
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| `options.define?` | `Object` | `{}` | 默认的表定义参数 |
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| `options.tablePrefix?` | `string` | `''` | NocoBase 扩展，表名前缀 |
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| `options.migrator?` | `UmzugOptions` | `{}` | NocoBase 扩展，迁移管理器相关参数，参考 [Umzug](https://github.com/sequelize/umzug/blob/main/src/types.ts#L15) 实现 |
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**示例**
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```ts
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import Database from '@nocobase/database';
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const app = new Database({
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dialect: 'mysql',
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host: 'localhost',
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port: 3306,
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username: 'root',
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password: '123456',
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database: 'test',
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tablePrefix: 'my_'
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});
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```
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## 实例成员
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### `sequelize`
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初始化后的 Sequelize 实例，在需要使用 sequelize 底层方法时可以调用，相关信息可以直接参考 sequelize 的文档。
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### `options`
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初始化的配置参数，包含了 Sequelize 的配置参数和 NocoBase 的额外配置参数。
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### `version`
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连接的数据库的版本信息对象，可通过 `await db.version.satisfies(<sem_ver>)` 检查是否满足特定数据库版本要求。
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**示例**
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```ts
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const r = await this.db.version.satisfies({
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mysql: '>=8.0.17',
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sqlite: '3.x',
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postgres: '>=10',
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});
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```
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## 迁移相关方法
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### `addMigration()`
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添加单个迁移文件。
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**签名**
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* `addMigration(options: MigrationItem)`
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**参数**
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| 参数名 | 类型 | 默认值 | 描述 |
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| --- | --- | --- | --- |
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| `options.name` | `string` | - | 迁移文件名称 |
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| `options.context?` | `string` | - | 迁移文件的 `up` 方法 |
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| `options.migration?` | `typeof Migration` | - | 迁移文件的自定义类 |
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| `options.up` | `Function` | - | 迁移文件的 `up` 方法 |
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| `options.down` | `Function` | - | 迁移文件的 `down` 方法 |
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**示例**
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```ts
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db.addMigration({
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name: '20220916120411-test-1',
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async up() {
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const queryInterface = this.context.db.sequelize.getQueryInterface();
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await queryInterface.query(/* your migration sqls */);
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}
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});
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```
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### `addMigrations()`
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添加指定目录下的迁移文件。
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**签名**
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* `addMigrations(options: AddMigrationsOptions): void`
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**参数**
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| 参数名 | 类型 | 默认值 | 描述 |
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| --- | --- | --- | --- |
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| `options.directory` | `string` | `''` | 迁移文件所在目录 |
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| `options.extensions` | `string[]` | `['js', 'ts']` | 文件扩展名 |
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| `options.namespace?` | `string` | `''` | 命名空间 |
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| `options.context?` | `Object` | `{ db }` | 迁移文件的上下文 |
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**示例**
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```ts
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db.addMigrations({
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directory: path.resolve(__dirname, './migrations'),
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namespace: 'test'
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});
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```
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## 工具方法
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### `inDialect()`
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判断当前数据库类型是否为指定类型。
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**签名**
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* `inDialect(dialect: string[]): boolean`
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**参数**
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| 参数名 | 类型 | 默认值 | 描述 |
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| --- | --- | --- | --- |
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| `dialect` | `string[]` | - | 数据库类型，可选值为 `mysql`/`postgres`/`sqlite` |
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### `getTablePrefix()`
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获取配置中的表名前缀。
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**签名**
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* `getTablePrefix(): string`
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## 数据表配置
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### `collection()`
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定义一个数据表。该调用类似与 Sequelize 的 `define` 方法，只在内存中创建表结构，如需持久化到数据库，需要调用 `sync` 方法。
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**签名**
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* `collection(options: CollectionOptions): Collection`
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**参数**
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`options` 所有配置参数与 `Collection` 类的构造函数一致，参考 [Collection](/api/server/database/collection#构造函数)。
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**事件**
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* `'beforeDefineCollection'`：在定义表之前触发。
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* `'afterDefineCollection'`：在定义表之后触发。
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**示例**
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```ts
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db.collection({
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name: 'books',
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fields: [
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{
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type: 'string',
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name: 'title',
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},
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{
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type: 'float',
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name: 'price',
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}
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]
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});
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// sync collection as table to db
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await db.sync();
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```
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### `getCollection()`
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获取已定义的数据表。
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**签名**
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* `getCollection(name: string): Collection`
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**参数**
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| 参数名 | 类型 | 默认值 | 描述 |
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| --- | --- | --- | --- |
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| `name` | `string` | - | 表名 |
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**示例**
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```ts
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const collection = db.getCollection('books');
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```
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### `hasCollection()`
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判断是否已定义指定的数据表。
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**签名**
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* `hasCollection(name: string): boolean`
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**参数**
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| 参数名 | 类型 | 默认值 | 描述 |
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| --- | --- | --- | --- |
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| `name` | `string` | - | 表名 |
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**示例**
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```ts
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db.collection({ name: 'books' });
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db.hasCollection('books'); // true
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db.hasCollection('authors'); // false
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```
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### `removeCollection()`
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移除已定义的数据表。仅在内存中移除，如需持久化，需要调用 `sync` 方法。
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**签名**
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* `removeCollection(name: string): void`
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**参数**
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| 参数名 | 类型 | 默认值 | 描述 |
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| --- | --- | --- | --- |
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| `name` | `string` | - | 表名 |
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**事件**
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* `'beforeRemoveCollection'`：在移除表之前触发。
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* `'afterRemoveCollection'`：在移除表之后触发。
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**示例**
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```ts
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db.collection({ name: 'books' });
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db.removeCollection('books');
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```
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### `import()`
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导入文件目录下所有文件作为 collection 配置载入内存。
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**签名**
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* `async import(options: { directory: string; extensions?: ImportFileExtension[] }): Promise<Map<string, Collection>>`
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**参数**
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| 参数名 | 类型 | 默认值 | 描述 |
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| --- | --- | --- | --- |
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| `options.directory` | `string` | - | 要导入的目录路径 |
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| `options.extensions` | `string[]` | `['ts', 'js']` | 扫描特定后缀 |
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**示例**
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`./collections/books.ts` 文件定义的 collection 如下：
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```ts
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export default {
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name: 'books',
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fields: [
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{
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type: 'string',
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name: 'title',
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}
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]
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};
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```
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在插件加载时导入相关配置：
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```ts
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class Plugin {
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async load() {
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await this.app.db.import({
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directory: path.resolve(__dirname, './collections'),
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});
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}
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}
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```
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## 扩展注册与获取
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### `registerFieldTypes()`
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注册自定义字段类型。
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**签名**
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* `registerFieldTypes(fieldTypes: MapOf<typeof Field>): void`
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**参数**
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`fieldTypes` 是一个键值对，键为字段类型名称，值为字段类型类。
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**示例**
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```ts
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import { Field } from '@nocobase/database';
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class MyField extends Field {
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// ...
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}
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db.registerFieldTypes({
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myField: MyField,
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});
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```
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### `registerModels()`
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注册自定义数据模型类。
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**签名**
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* `registerModels(models: MapOf<ModelCtor<any>>): void`
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**参数**
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`models` 是一个键值对，键为数据模型名称，值为数据模型类。
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**示例**
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```ts
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import { Model } from '@nocobase/database';
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class MyModel extends Model {
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// ...
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}
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db.registerModels({
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myModel: MyModel,
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});
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db.collection({
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name: 'myCollection',
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model: 'myModel'
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});
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```
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### `registerRepositories()`
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注册自定义数据仓库类。
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**签名**
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* `registerRepositories(repositories: MapOf<RepositoryType>): void`
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**参数**
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`repositories` 是一个键值对，键为数据仓库名称，值为数据仓库类。
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**示例**
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```ts
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import { Repository } from '@nocobase/database';
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class MyRepository extends Repository {
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// ...
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}
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db.registerRepositories({
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myRepository: MyRepository,
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});
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db.collection({
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name: 'myCollection',
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repository: 'myRepository'
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});
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```
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### `registerOperators()`
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注册自定义数据查询操作符。
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**签名**
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* `registerOperators(operators: MapOf<OperatorFunc>)`
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**参数**
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`operators` 是一个键值对，键为操作符名称，值为操作符比较语句生成函数。
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**示例**
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```ts
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db.registerOperators({
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$dateOn(value) {
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return {
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[Op.and]: [{ [Op.gte]: stringToDate(value) }, { [Op.lt]: getNextDay(value) }],
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};
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}
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});
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db.getRepository('books').count({
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filter: {
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createdAt: {
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// registered operator
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$dateOn: '2020-01-01',
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}
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}
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});
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```
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### `getModel()`
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获取已定义的数据模型类。如果没有在之前注册自定义模型类，将返回 Sequelize 默认的模型类。默认名称与 collection 定义的名称相同。
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**签名**
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* `getModel(name: string): Model`
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**参数**
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| 参数名 | 类型 | 默认值 | 描述 |
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| --- | --- | --- | --- |
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| `name` | `string` | - | 已注册的模型名 |
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**示例**
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```ts
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db.registerModels({
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books: class MyModel extends Model {}
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});
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const ModelClass = db.getModel('books');
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console.log(ModelClass.prototype instanceof MyModel) // true
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```
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注：从 collection 中获取的模型类并不与注册时的模型类严格相等，而是继承自注册时的模型类。由于 Sequelize 的模型类在初始化过程中属性会被修改，所以 NocoBase 自动处理了这个继承关系。除类不相等以外，其他所有定义都可以正常使用。
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### `getRepository()`
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获取自定义的数据仓库类。如果没有在之前注册自定义数据仓库类，将返回 NocoBase 默认的数据仓库类。默认名称与 collection 定义的名称相同。
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数据仓库类主要用于基于数据模型的增删改查等操作，参考 [数据仓库](/api/server/database/repository)。
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**签名**
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* `getRepository(name: string): Repository`
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* `getRepository(name: string, relationId?: string | number): Repository`
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**参数**
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| 参数名 | 类型 | 默认值 | 描述 |
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| --- | --- | --- | --- |
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| `name` | `string` | - | 已注册的数据仓库名 |
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| `relationId` | `string` \| `number` | - | 关系数据的外键值 |
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当名称是形如 `'tables.relactions'` 的带关联的名称时，将返回关联的数据仓库类。如果提供了第二个参数，数据仓库在使用时（查询、修改等）会基于关系数据的外键值。
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**示例**
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假设有两张数据表_文章_与_作者_，并且文章表中有一个外键指向作者表：
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```ts
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const AuthorsRepo = db.getRepository('authors');
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const author1 = AuthorsRepo.create({ name: 'author1' });
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const PostsRepo = db.getRepository('authors.posts', author1.id);
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const post1 = AuthorsRepo.create({ title: 'post1' });
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asset(post1.authorId === author1.id); // true
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```
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## 数据库事件
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||
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### `on()`
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监听数据库事件。
|
||
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**签名**
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* `on(event: string, listener: (...args: any[]) => void | Promise<void>): void`
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**参数**
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||
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||
| 参数名 | 类型 | 默认值 | 描述 |
|
||
| --- | --- | --- | --- |
|
||
| event | string | - | 事件名称 |
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||
| listener | Function | - | 事件监听器 |
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||
|
||
事件名称默认支持 Sequelize 的 Model 事件。针对全局事件，通过 `<sequelize_model_global_event>` 的名称方式监听，针对单 Model 事件，通过 `<model_name>.<sequelize_model_event>` 的名称方式监听。
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||
所有内置的事件类型的参数说明和详细示例参考 [内置事件](#内置事件) 部分内容。
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### `off()`
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||
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||
移除事件监听函数。
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**签名**
|
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|
||
* `off(name: string, listener: Function)`
|
||
|
||
| 参数名 | 类型 | 默认值 | 描述 |
|
||
| --- | --- | --- | --- |
|
||
| name | string | - | 事件名称 |
|
||
| listener | Function | - | 事件监听器 |
|
||
|
||
**示例**
|
||
|
||
```ts
|
||
const listener = async (model, options) => {
|
||
console.log(model);
|
||
};
|
||
|
||
db.on('afterCreate', listener);
|
||
|
||
db.off('afterCreate', listener);
|
||
```
|
||
|
||
## 数据库操作
|
||
|
||
### `auth()`
|
||
|
||
数据库连接验证。可以用于确保应用与数据已建立连接。
|
||
|
||
**签名**
|
||
|
||
* `auth(options: QueryOptions & { retry?: number } = {}): Promise<boolean>`
|
||
|
||
**参数**
|
||
|
||
| 参数名 | 类型 | 默认值 | 描述 |
|
||
| --- | --- | --- | --- |
|
||
| `options?` | `Object` | - | 验证选项 |
|
||
| `options.retry?` | `number` | `10` | 验证失败时重试次数 |
|
||
| `options.transaction?` | `Transaction` | - | 事务对象 |
|
||
| `options.logging?` | `boolean \| Function` | `false` | 是否打印日志 |
|
||
|
||
**示例**
|
||
|
||
```ts
|
||
await db.auth();
|
||
```
|
||
|
||
### `reconnect()`
|
||
|
||
重新连接数据库。
|
||
|
||
**示例**
|
||
|
||
```ts
|
||
await db.reconnect();
|
||
```
|
||
|
||
### `closed()`
|
||
|
||
判断数据库是否已关闭连接。
|
||
|
||
**签名**
|
||
|
||
* `closed(): boolean`
|
||
|
||
### `close()`
|
||
|
||
关闭数据库连接。等同于 `sequelize.close()`。
|
||
|
||
### `sync()`
|
||
|
||
同步数据库表结构。等同于 `sequelize.sync()`，参数参考 [Sequelize 文档](https://sequelize.org/api/v6/class/src/sequelize.js~sequelize#instance-method-sync)。
|
||
|
||
### `clean()`
|
||
|
||
清空数据库，将删除所有数据表。
|
||
|
||
**签名**
|
||
|
||
* `clean(options: CleanOptions): Promise<void>`
|
||
|
||
**参数**
|
||
|
||
| 参数名 | 类型 | 默认值 | 描述 |
|
||
| --- | --- | --- | --- |
|
||
| `options.drop` | `boolean` | `false` | 是否移除所有数据表 |
|
||
| `options.skip` | `string[]` | - | 跳过的表名配置 |
|
||
| `options.transaction` | `Transaction` | - | 事务对象 |
|
||
|
||
**示例**
|
||
|
||
移除除 `users` 表以外的所有表。
|
||
|
||
```ts
|
||
await db.clean({
|
||
drop: true,
|
||
skip: ['users']
|
||
})
|
||
```
|
||
|
||
## 包级导出
|
||
|
||
### `defineCollection()`
|
||
|
||
创建一个数据表的配置内容。
|
||
|
||
**签名**
|
||
|
||
* `defineCollection(name: string, config: CollectionOptions): CollectionOptions`
|
||
|
||
**参数**
|
||
|
||
| 参数名 | 类型 | 默认值 | 描述 |
|
||
| --- | --- | --- | --- |
|
||
| `collectionOptions` | `CollectionOptions` | - | 与所有 `db.collection()` 的参数相同 |
|
||
|
||
**示例**
|
||
|
||
对于要被 `db.import()` 导入的数据表配置文件：
|
||
|
||
```ts
|
||
import { defineCollection } from '@nocobase/database';
|
||
|
||
export default defineCollection({
|
||
name: 'users',
|
||
fields: [
|
||
{
|
||
type: 'string',
|
||
name: 'name',
|
||
},
|
||
],
|
||
});
|
||
```
|
||
|
||
### `extendCollection()`
|
||
|
||
扩展已在内存中的表结构配置内容，主要用于 `import()` 方法导入的文件内容。该方法是 `@nocobase/database` 包导出的顶级方法，不通过 db 实例调用。也可以使用 `extend` 别名。
|
||
|
||
**签名**
|
||
|
||
* `extendCollection(collectionOptions: CollectionOptions, mergeOptions?: MergeOptions): ExtendedCollectionOptions`
|
||
|
||
**参数**
|
||
|
||
| 参数名 | 类型 | 默认值 | 描述 |
|
||
| --- | --- | --- | --- |
|
||
| `collectionOptions` | `CollectionOptions` | - | 与所有 `db.collection()` 的参数相同 |
|
||
| `mergeOptions?` | `MergeOptions` | - | npm 包 [deepmerge](https://npmjs.com/package/deepmerge) 的参数 |
|
||
|
||
**示例**
|
||
|
||
原始 books 表定义（books.ts）：
|
||
|
||
```ts
|
||
export default {
|
||
name: 'books',
|
||
fields: [
|
||
{ name: 'title', type: 'string' }
|
||
]
|
||
}
|
||
```
|
||
|
||
扩展 books 表定义（books.extend.ts）：
|
||
|
||
```ts
|
||
import { extend } from '@nocobase/database';
|
||
|
||
// 再次扩展
|
||
export default extend({
|
||
name: 'books',
|
||
fields: [
|
||
{ name: 'price', type: 'number' }
|
||
]
|
||
});
|
||
```
|
||
|
||
以上两个文件如在调用 `import()` 时导入，通过 `extend()` 再次扩展以后，books 表将拥有 `title` 和 `price` 两个字段。
|
||
|
||
此方法在扩展已有插件已定义的表结构时非常有用。
|
||
|
||
## 内置事件
|
||
|
||
数据库会在相应的生命周期触发以下对应的事件，通过 `on()` 方法订阅后进行特定的处理可满足一些业务需要。
|
||
|
||
### `'beforeSync'` / `'afterSync'`
|
||
|
||
当新的表结构配置（字段、索引等）被同步到数据库前后触发，通常在执行 `collection.sync()`（内部调用）时会触发，一般用于一些特殊的字段扩展的逻辑处理。
|
||
|
||
**签名**
|
||
|
||
```ts
|
||
on(eventName: `${string}.beforeSync` | 'beforeSync' | `${string}.afterSync` | 'afterSync', listener: SyncListener): this
|
||
```
|
||
|
||
**类型**
|
||
|
||
```ts
|
||
import type { SyncOptions, HookReturn } from 'sequelize/types';
|
||
|
||
type SyncListener = (options?: SyncOptions) => HookReturn;
|
||
```
|
||
|
||
**示例**
|
||
|
||
```ts
|
||
const users = db.collection({
|
||
name: 'users',
|
||
fields: [
|
||
{ type: 'string', name: 'username' }
|
||
]
|
||
});
|
||
|
||
db.on('beforeSync', async (options) => {
|
||
// do something
|
||
});
|
||
|
||
db.on('users.afterSync', async (options) => {
|
||
// do something
|
||
});
|
||
|
||
await users.sync();
|
||
```
|
||
|
||
### `'beforeValidate'` / `'afterValidate'`
|
||
|
||
创建或更新数据前会有基于 collection 定义的规则对数据的验证过程，在验证前后会触发对应事件。当调用 `repository.create()` 或 `repository.update()` 时会触发。
|
||
|
||
**签名**
|
||
|
||
```ts
|
||
on(eventName: `${string}.beforeValidate` | 'beforeValidate' | `${string}.afterValidate` | 'afterValidate', listener: ValidateListener): this
|
||
```
|
||
|
||
**类型**
|
||
|
||
```ts
|
||
import type { ValidationOptions } from 'sequelize/types/lib/instance-validator';
|
||
import type { HookReturn } from 'sequelize/types';
|
||
import type { Model } from '@nocobase/database';
|
||
|
||
type ValidateListener = (model: Model, options?: ValidationOptions) => HookReturn;
|
||
```
|
||
|
||
**示例**
|
||
|
||
```ts
|
||
db.collection({
|
||
name: 'tests',
|
||
fields: [
|
||
{
|
||
type: 'string',
|
||
name: 'email',
|
||
validate: {
|
||
isEmail: true,
|
||
},
|
||
}
|
||
],
|
||
});
|
||
|
||
// all models
|
||
db.on('beforeValidate', async (model, options) => {
|
||
// do something
|
||
});
|
||
// tests model
|
||
db.on('tests.beforeValidate', async (model, options) => {
|
||
// do something
|
||
});
|
||
|
||
// all models
|
||
db.on('afterValidate', async (model, options) => {
|
||
// do something
|
||
});
|
||
// tests model
|
||
db.on('tests.afterValidate', async (model, options) => {
|
||
// do something
|
||
});
|
||
|
||
const repository = db.getRepository('tests');
|
||
await repository.create({
|
||
values: {
|
||
email: 'abc', // checks for email format
|
||
},
|
||
});
|
||
// or
|
||
await repository.update({
|
||
filterByTk: 1,
|
||
values: {
|
||
email: 'abc', // checks for email format
|
||
},
|
||
});
|
||
```
|
||
|
||
### `'beforeCreate'` / `'afterCreate'`
|
||
|
||
创建一条数据前后会触发对应事件，当调用 `repository.create()` 时会触发。
|
||
|
||
**签名**
|
||
|
||
```ts
|
||
on(eventName: `${string}.beforeCreate` | 'beforeCreate' | `${string}.afterCreate` | 'afterCreate', listener: CreateListener): this
|
||
```
|
||
|
||
**类型**
|
||
|
||
```ts
|
||
import type { CreateOptions, HookReturn } from 'sequelize/types';
|
||
import type { Model } from '@nocobase/database';
|
||
|
||
export type CreateListener = (model: Model, options?: CreateOptions) => HookReturn;
|
||
```
|
||
|
||
**示例**
|
||
|
||
```ts
|
||
db.on('beforeCreate', async (model, options) => {
|
||
// do something
|
||
});
|
||
|
||
db.on('books.afterCreate', async (model, options) => {
|
||
const { transaction } = options;
|
||
const result = await model.constructor.findByPk(model.id, {
|
||
transaction
|
||
});
|
||
console.log(result);
|
||
});
|
||
```
|
||
|
||
### `'beforeUpdate'` / `'afterUpdate'`
|
||
|
||
更新一条数据前后会触发对应事件，当调用 `repository.update()` 时会触发。
|
||
|
||
**签名**
|
||
|
||
```ts
|
||
on(eventName: `${string}.beforeUpdate` | 'beforeUpdate' | `${string}.afterUpdate` | 'afterUpdate', listener: UpdateListener): this
|
||
```
|
||
|
||
**类型**
|
||
|
||
```ts
|
||
import type { UpdateOptions, HookReturn } from 'sequelize/types';
|
||
import type { Model } from '@nocobase/database';
|
||
|
||
export type UpdateListener = (model: Model, options?: UpdateOptions) => HookReturn;
|
||
```
|
||
|
||
**示例**
|
||
|
||
```ts
|
||
db.on('beforeUpdate', async (model, options) => {
|
||
// do something
|
||
});
|
||
|
||
db.on('books.afterUpdate', async (model, options) => {
|
||
// do something
|
||
});
|
||
```
|
||
|
||
### `'beforeSave'` / `'afterSave'`
|
||
|
||
创建或更新一条数据前后会触发对应事件，当调用 `repository.create()` 或 `repository.update()` 时会触发。
|
||
|
||
**签名**
|
||
|
||
```ts
|
||
on(eventName: `${string}.beforeSave` | 'beforeSave' | `${string}.afterSave` | 'afterSave', listener: SaveListener): this
|
||
```
|
||
|
||
**类型**
|
||
|
||
```ts
|
||
import type { SaveOptions, HookReturn } from 'sequelize/types';
|
||
import type { Model } from '@nocobase/database';
|
||
|
||
export type SaveListener = (model: Model, options?: SaveOptions) => HookReturn;
|
||
```
|
||
|
||
**示例**
|
||
|
||
```ts
|
||
db.on('beforeSave', async (model, options) => {
|
||
// do something
|
||
});
|
||
|
||
db.on('books.afterSave', async (model, options) => {
|
||
// do something
|
||
});
|
||
```
|
||
|
||
### `'beforeDestroy'` / `'afterDestroy'`
|
||
|
||
删除一条数据前后会触发对应事件，当调用 `repository.destroy()` 时会触发。
|
||
|
||
**签名**
|
||
|
||
```ts
|
||
on(eventName: `${string}.beforeDestroy` | 'beforeDestroy' | `${string}.afterDestroy` | 'afterDestroy', listener: DestroyListener): this
|
||
```
|
||
|
||
**类型**
|
||
|
||
```ts
|
||
import type { DestroyOptions, HookReturn } from 'sequelize/types';
|
||
import type { Model } from '@nocobase/database';
|
||
|
||
export type DestroyListener = (model: Model, options?: DestroyOptions) => HookReturn;
|
||
```
|
||
|
||
**示例**
|
||
|
||
```ts
|
||
db.on('beforeDestroy', async (model, options) => {
|
||
// do something
|
||
});
|
||
|
||
db.on('books.afterDestroy', async (model, options) => {
|
||
// do something
|
||
});
|
||
```
|
||
|
||
### `'afterCreateWithAssociations'`
|
||
|
||
创建一条携带层级关系数据的数据之后会触发对应事件，当调用 `repository.create()` 时会触发。
|
||
|
||
**签名**
|
||
|
||
```ts
|
||
on(eventName: `${string}.afterCreateWithAssociations` | 'afterCreateWithAssociations', listener: CreateWithAssociationsListener): this
|
||
```
|
||
|
||
**类型**
|
||
|
||
```ts
|
||
import type { CreateOptions, HookReturn } from 'sequelize/types';
|
||
import type { Model } from '@nocobase/database';
|
||
|
||
export type CreateWithAssociationsListener = (model: Model, options?: CreateOptions) => HookReturn;
|
||
```
|
||
|
||
**示例**
|
||
|
||
```ts
|
||
db.on('afterCreateWithAssociations', async (model, options) => {
|
||
// do something
|
||
});
|
||
|
||
db.on('books.afterCreateWithAssociations', async (model, options) => {
|
||
// do something
|
||
});
|
||
```
|
||
|
||
### `'afterUpdateWithAssociations'`
|
||
|
||
更新一条携带层级关系数据的数据之后会触发对应事件，当调用 `repository.update()` 时会触发。
|
||
|
||
**签名**
|
||
|
||
```ts
|
||
on(eventName: `${string}.afterUpdateWithAssociations` | 'afterUpdateWithAssociations', listener: CreateWithAssociationsListener): this
|
||
```
|
||
|
||
**类型**
|
||
|
||
```ts
|
||
import type { UpdateOptions, HookReturn } from 'sequelize/types';
|
||
import type { Model } from '@nocobase/database';
|
||
|
||
export type UpdateWithAssociationsListener = (model: Model, options?: UpdateOptions) => HookReturn;
|
||
```
|
||
|
||
**示例**
|
||
|
||
```ts
|
||
db.on('afterUpdateWithAssociations', async (model, options) => {
|
||
// do something
|
||
});
|
||
|
||
db.on('books.afterUpdateWithAssociations', async (model, options) => {
|
||
// do something
|
||
});
|
||
```
|
||
|
||
### `'afterSaveWithAssociations'`
|
||
|
||
创建或更新一条携带层级关系数据的数据之后会触发对应事件，当调用 `repository.create()` 或 `repository.update()` 时会触发。
|
||
|
||
**签名**
|
||
|
||
```ts
|
||
on(eventName: `${string}.afterSaveWithAssociations` | 'afterSaveWithAssociations', listener: SaveWithAssociationsListener): this
|
||
```
|
||
|
||
**类型**
|
||
|
||
```ts
|
||
import type { SaveOptions, HookReturn } from 'sequelize/types';
|
||
import type { Model } from '@nocobase/database';
|
||
|
||
export type SaveWithAssociationsListener = (model: Model, options?: SaveOptions) => HookReturn;
|
||
```
|
||
|
||
**示例**
|
||
|
||
```ts
|
||
db.on('afterSaveWithAssociations', async (model, options) => {
|
||
// do something
|
||
});
|
||
|
||
db.on('books.afterSaveWithAssociations', async (model, options) => {
|
||
// do something
|
||
});
|
||
```
|
||
|
||
### `'beforeDefineCollection'`
|
||
|
||
当定义一个数据表之前触发，如调用 `db.collection()` 时。
|
||
|
||
注：该事件是同步事件。
|
||
|
||
**签名**
|
||
|
||
```ts
|
||
on(eventName: 'beforeDefineCollection', listener: BeforeDefineCollectionListener): this
|
||
```
|
||
|
||
**类型**
|
||
|
||
```ts
|
||
import type { CollectionOptions } from '@nocobase/database';
|
||
|
||
export type BeforeDefineCollectionListener = (options: CollectionOptions) => void;
|
||
```
|
||
|
||
**示例**
|
||
|
||
```ts
|
||
db.on('beforeDefineCollection', (options) => {
|
||
// do something
|
||
});
|
||
```
|
||
|
||
### `'afterDefineCollection'`
|
||
|
||
当定义一个数据表之后触发，如调用 `db.collection()` 时。
|
||
|
||
注：该事件是同步事件。
|
||
|
||
**签名**
|
||
|
||
```ts
|
||
on(eventName: 'afterDefineCollection', listener: AfterDefineCollectionListener): this
|
||
```
|
||
|
||
**类型**
|
||
|
||
```ts
|
||
import type { Collection } from '@nocobase/database';
|
||
|
||
export type AfterDefineCollectionListener = (options: Collection) => void;
|
||
```
|
||
|
||
**示例**
|
||
|
||
```ts
|
||
db.on('afterDefineCollection', (collection) => {
|
||
// do something
|
||
});
|
||
```
|
||
|
||
### `'beforeRemoveCollection'` / `'afterRemoveCollection'`
|
||
|
||
当从内存中移除一个数据表前后触发，如调用 `db.removeCollection()` 时。
|
||
|
||
注：该事件是同步事件。
|
||
|
||
**签名**
|
||
|
||
```ts
|
||
on(eventName: 'beforeRemoveCollection' | 'afterRemoveCollection', listener: RemoveCollectionListener): this
|
||
```
|
||
|
||
**类型**
|
||
|
||
```ts
|
||
import type { Collection } from '@nocobase/database';
|
||
|
||
export type RemoveCollectionListener = (options: Collection) => void;
|
||
```
|
||
|
||
**示例**
|
||
|
||
```ts
|
||
db.on('beforeRemoveCollection', (collection) => {
|
||
// do something
|
||
});
|
||
|
||
db.on('afterRemoveCollection', (collection) => {
|
||
// do something
|
||
});
|
||
```
|