2021-10-28 22:55:51 +08:00
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---
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toc: menu
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---
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# Repository
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## `repository.findMany()`
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查询数据,返回数组。无数据时为空数组,不返回 count。如果需要,请使用 [repository.paginate()](#repositorypaginate) 方法。
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##### Definition
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```ts
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interface findMany<M extends Sequelize.Model> {
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(options?: FindManyOptions): Promise<M[]>
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}
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interface FindManyOptions extends Sequelize.FindOptions {
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// 数据过滤
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filter?: FilterOptions;
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// 输出结果显示哪些字段
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fields?: string[];
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// 输出结果不显示哪些字段
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expect?: string[];
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// 附加字段,用于控制关系字段的输出
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appends?: string[];
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// 排序,字段前面加上 “-” 表示降序
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sort?: string[];
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}
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// 待补充
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type FilterOptions = any;
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```
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##### Examples
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###### 全览
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```ts
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await repository.findMany({
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// 过滤
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filter: {
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$and: [{ a: 5 }, { b: 6 }], // (a = 5) AND (b = 6)
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$or: [{ a: 5 }, { b: 6 }], // (a = 5) OR (b = 6)
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someAttribute: {
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// Basics
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$eq: 3, // = 3
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$ne: 20, // != 20
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$is: null, // IS NULL
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$not: true, // IS NOT TRUE
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$gt: 6, // > 6
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$gte: 6,
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},
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// 支持使用逗号间隔
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'someAttribute.$eq': 3,
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// 内嵌的,一般是关系数据
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nested: {
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someAttribute: {},
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},
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// 同上,也支持使用逗号间隔
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'nested.someAttribute': {
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// 同上
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},
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},
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// 字段白名单
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fields: [],
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// 附加字段,主要用于附加关系字段
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appends: [],
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// 字段黑名单
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expect: [],
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// 排序
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sort: ['-createdAt', 'updatedAt'],
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});
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```
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###### filter 参数示例说明
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以文章和标签为例,文章和标签的 collection 如下:
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```ts
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const Tag = db.collection({
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name: 'tags',
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fields: [
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{ type: 'string', name: 'name' },
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],
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});
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const Post = db.collection({
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name: 'posts',
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fields: [
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{ type: 'string', name: 'name' },
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{ type: 'text', name: 'content' },
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{ type: 'belongsToMany', name: 'tags' },
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],
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});
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```
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最简单的筛选过滤
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```ts
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await Post.repository.findMany({
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filter: {
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'name': 'post1',
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},
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});
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```
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支持多种 Operators,以 `$` 开头。[更多内容,查阅 Operators 章节](operators.md)
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```ts
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await Post.repository.findMany({
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filter: {
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'name.$includes': 'post1',
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// 等同于
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name: {
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$includes: 'post1',
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},
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},
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});
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```
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支持关系字段过滤,可以使用 dot 来表示层级结构
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```ts
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await Post.repository.findMany({
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filter: {
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'tags.name': 'tag1',
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// 等同于
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tags: {
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name: 'tag1',
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},
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},
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});
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```
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多个同一关系字段的过滤可以写在一起
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```ts
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await Post.repository.findMany({
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filter: {
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'tags': {
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'name.$includes': 'tag1',
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'createdAt.$dateOn': '2020-10-28',
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},
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},
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});
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```
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同时也支持 and、or 逻辑运算符
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```ts
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await Post.repository.findMany({
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filter: {
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$and: [
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// 一个 Object 只写一个条件
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{ name: 'post1' },
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// 支持关系字段(非常重要)
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{ 'tags.name.$includes': 'tag1' },
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{ 'tags.name.$includes': 'tag2' },
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],
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},
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});
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```
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###### sort 参数示例说明
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指定一组数据的排序,倒序时在字段前加上减号 `-`
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```ts
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await Post.repository.findMany({
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// 创建日期倒序
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sort: ['-createdAt'],
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});
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```
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可以设置多个排序规则
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```ts
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await Post.repository.findMany({
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// 创建日期倒序,ID 正序
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sort: ['-createdAt', 'id'],
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});
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```
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也可以是关系表的字段
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```ts
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await Post.repository.findMany({
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// 标签名正序,文章创建日期倒序
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sort: ['tags.name', '-createdAt'],
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});
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```
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###### fields 参数示例说明
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- `fields` 显示哪些字段
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- `expect` 不显示哪些字段
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- `appends` 附加哪些字段
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如果并未指定 fields,输出所有 Attributes,Associations 字段并不输出
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```ts
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await Post.repository.findMany();
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// [{ id, name, content, createdAt, updatedAt }]
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```
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只输出指定字段时,可以用 fields
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```ts
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await Post.repository.findMany({
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fields: ['name'],
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});
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// [{ name }]
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```
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当 fields 里有关系字段时,按默认情况输出
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```ts
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await Post.repository.findMany({
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fields: ['id', 'name', 'tags'],
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});
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//
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// [{ id, name, createdAt, updatedAt, tags: [{ id, name, createdAt, updatedAt }] }]
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```
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可以只输出关系数据的某个字段
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```ts
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await Post.repository.findMany({
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fields: ['id', 'name', 'tags.name'],
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});
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// [{ id, name, tags: [{ name }] }]
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```
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排除某些字段时,可以使用 expect
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```ts
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await Post.repository.findMany({
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expect: ['content'],
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});
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// [{ id, name, createdAt, updatedAt }]
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```
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Attributes 不变,只附加 Associations 进来时,可以使用 appends
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```ts
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await Post.repository.findMany({
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appends: ['tags'],
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});
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// [{ id, name, content, createdAt, updatedAt, tags: [{ id, name, createdAt, updatedAt }] }]
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```
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如果某个字段只用在 filter 里,但并没有出现在 fields 里,不应该被输出
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```ts
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await Post.repository.findMany({
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filter: {
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'tags.name': 'tag1',
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},
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});
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// 输出所有的 Attributes,但不输出 tags
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// [{ id, name, content, createdAt, updatedAt }]
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```
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如果某个字段只用在 sort 里,但并没有出现在 fields 里,也不应该被输出
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```ts
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await Post.repository.findMany({
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sort: ['-tags.createdAt']
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});
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// 输出所有的 Attributes,但不输出 tags
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// [{ id, name, content, createdAt, updatedAt }]
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```
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## `repository.paginate()`
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按分页查询数据,并返回所有符合的数据总数。
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##### Definition
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```ts
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interface paginate<M extends Sequelize.Model> {
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(options?: PaginateOptions): Promise<[ M[], number ]>
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}
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interface PaginateOptions extends Sequelize.FindAndCountOptions {
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// 数据过滤
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filter?: FilterOptions;
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// 输出结果显示哪些字段
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fields?: string[];
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// 输出结果不显示哪些字段
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expect?: string[];
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// 附加字段,用于控制关系字段的输出
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appends?: string[];
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// 排序,字段前面加上 “-” 表示降序
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sort?: string[];
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// 当前页,默认为 1
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page?: number;
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// 当前页最大数量,默认为 20
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pageSize?: number;
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}
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```
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##### Examples
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大部分参数与 [repository.findMany()](#repositoryfindmany) 一致,所以这里只列举 page 和 pageSize 的例子。
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不填写参数时,默认 page=1,pageSize=20。
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```ts
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await repository.paginate();
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// [[{ id, name, content, createdAt, updatedAt }], 50]
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const [models, count] = await repository.paginate();
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```
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指定页码和单页最大数量
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```ts
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await repository.paginate({
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page: 1,
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pageSize: 50,
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});
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// [[{ id, name, content, createdAt, updatedAt }], 50]
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```
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2021-10-28 22:55:51 +08:00
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## `repository.findOne()`
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##### Definition
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```ts
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interface findOne<M extends Sequelize.Model> {
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(options?: FindOneOptions): Promise<[ M[], number ]>
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}
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interface FindOneOptions extends FindManyOptions {
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// 数据过滤
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filter?: FilterOptions;
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// 输出结果显示哪些字段
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fields?: string[];
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// 输出结果不显示哪些字段
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expect?: string[];
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// 附加字段,用于控制关系字段的输出
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appends?: string[];
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|
// 排序,字段前面加上 “-” 表示降序
|
|
|
|
|
sort?: string[];
|
|
|
|
|
// 通过 pk 过滤
|
|
|
|
|
filterByPk?: number | string;
|
|
|
|
|
}
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
##### Examples
|
|
|
|
|
|
|
|
|
|
大部分参数与 [repository.findMany()](#repositoryfindmany) 一致。这里只列举 filterByPk 的例子。
|
|
|
|
|
|
|
|
|
|
```ts
|
|
|
|
|
await repository.findOne({
|
|
|
|
|
filterByPk: 1,
|
|
|
|
|
// 等同于
|
|
|
|
|
filter: {
|
|
|
|
|
[Model.primaryKeyAttribute]: 1,
|
|
|
|
|
}
|
|
|
|
|
});
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
## repository.create()
|
2021-10-29 13:55:49 +08:00
|
|
|
|
|
|
|
|
|
创建数据
|
|
|
|
|
|
|
|
|
|
##### Definition
|
|
|
|
|
|
|
|
|
|
```ts
|
|
|
|
|
interface create<M extends Sequelize.Model> {
|
|
|
|
|
(options?: CreateOptions): Promise<M>
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
interface CreateOptions {
|
|
|
|
|
// 数据
|
|
|
|
|
values?: any;
|
|
|
|
|
// 字段白名单
|
|
|
|
|
whitelist?: string[];
|
|
|
|
|
// 字段黑名单
|
|
|
|
|
blacklist?: string[];
|
|
|
|
|
// 关系数据默认会新建并建立关联处理,如果是已存在的数据只关联,但不更新关系数据
|
|
|
|
|
// 如果需要更新关联数据,可以通过 updateAssociations 指定
|
|
|
|
|
updateAssociations?: string[];
|
|
|
|
|
}
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
##### Examples
|
|
|
|
|
|
|
|
|
|
例子之前,先定义几个 Collection 吧
|
|
|
|
|
|
|
|
|
|
```ts
|
|
|
|
|
db.collection({
|
|
|
|
|
name: 'users',
|
|
|
|
|
fields: [
|
|
|
|
|
{name: 'name', type: 'string'},
|
|
|
|
|
],
|
|
|
|
|
});
|
|
|
|
|
|
|
|
|
|
db.collection({
|
|
|
|
|
name: 'posts',
|
|
|
|
|
fields: [
|
|
|
|
|
{ type: 'string', name: 'name' },
|
|
|
|
|
{ type: 'belongsTo', name: 'user' },
|
|
|
|
|
{ type: 'belongsToMany', name: 'tags' },
|
|
|
|
|
{ type: 'hasMany', name: 'comments' },
|
|
|
|
|
],
|
|
|
|
|
});
|
|
|
|
|
|
|
|
|
|
db.collection({
|
|
|
|
|
name: 'tags',
|
|
|
|
|
fields: [
|
|
|
|
|
{ type: 'string', name: 'name' },
|
|
|
|
|
{ type: 'belongsToMany', name: 'posts' },
|
|
|
|
|
],
|
|
|
|
|
});
|
|
|
|
|
|
|
|
|
|
db.collection({
|
|
|
|
|
name: 'comments',
|
|
|
|
|
fields: [
|
|
|
|
|
{ type: 'string', name: 'name' },
|
|
|
|
|
],
|
|
|
|
|
});
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
新建数据,可以不指定 values。
|
|
|
|
|
|
|
|
|
|
```ts
|
|
|
|
|
const model = await repository.create();
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
values 必须是 Object。
|
|
|
|
|
|
|
|
|
|
```ts
|
|
|
|
|
await repository.create({
|
|
|
|
|
values: {
|
|
|
|
|
name: 'post1',
|
|
|
|
|
},
|
|
|
|
|
});
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
values 可以包含关系数据
|
|
|
|
|
|
|
|
|
|
```ts
|
|
|
|
|
await repository.create({
|
|
|
|
|
values: {
|
|
|
|
|
name: 'post1',
|
|
|
|
|
// 新建并关联
|
|
|
|
|
tags: [{ name: 'tag1' }],
|
|
|
|
|
},
|
|
|
|
|
});
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
关联字段,可以只提供关系约束值(一般是 id)
|
|
|
|
|
|
|
|
|
|
```ts
|
|
|
|
|
await repository.create({
|
|
|
|
|
values: {
|
|
|
|
|
name: 'post1',
|
|
|
|
|
// 关联 id=1 的 tag
|
|
|
|
|
tags: [1],
|
|
|
|
|
// 也可以这样,会自动识别
|
|
|
|
|
tags: 1,
|
|
|
|
|
},
|
|
|
|
|
});
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
可以设置 values 的白名单和黑名单
|
|
|
|
|
|
|
|
|
|
```ts
|
|
|
|
|
await repository.create({
|
|
|
|
|
values: {
|
|
|
|
|
name: 'post1',
|
|
|
|
|
// 关联 id=1 的 tag
|
|
|
|
|
tags: [1],
|
|
|
|
|
},
|
|
|
|
|
whitelist: ['name'],
|
|
|
|
|
});
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
|
2021-10-28 22:55:51 +08:00
|
|
|
|
## repository.update()
|
|
|
|
|
## repository.destroy()
|
|
|
|
|
## repository.relation().of()
|
|
|
|
|
|
|
|
|
|
### findMany()
|
|
|
|
|
### findOne()
|
|
|
|
|
### create()
|
|
|
|
|
### update()
|
|
|
|
|
### destroy()
|
|
|
|
|
### set()
|
|
|
|
|
### add()
|
|
|
|
|
### remove()
|
|
|
|
|
### toggle()
|