2022-10-31 14:41:24 +00:00
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# 概述
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NocoBase 的 HTTP API 基于 Resource & Action 设计,是 REST API 的超集,操作不局限于增删改查,在 NocoBase 里,Resource Action 可以任意的扩展。
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## 资源 Resource
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在 NocoBase 里,资源(resource)有两种表达方式:
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- `<collection>`
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- `<collection>.<association>`
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<Alert>
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- collection 是所有抽象数据的集合
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- association 为 collection 的关联数据
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- resource 包括 collection 和 collection.association 两类
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</Alert>
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### 示例
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- `posts` 文章
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- `posts.user` 文章用户
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- `posts.tags` 文章标签
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## 操作 Action
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以 `:<action>` 的方式表示资源操作
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- `<collection>:<action>`
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- `<collection>.<association>:<action>`
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内置的全局操作,可用于 collection 或 association
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- `create`
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- `get`
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- `list`
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- `update`
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- `destroy`
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- `move`
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内置的关联操作,仅用于 association
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- `set`
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- `add`
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- `remove`
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- `toggle`
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### 示例
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- `posts:create` 创建文章
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- `posts.user:get` 查看文章用户
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- `posts.tags:add` 附加文章标签(将现有的标签与文章关联)
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## 请求 URL
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```bash
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<GET|POST> /api/<collection>:<action>
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<GET|POST> /api/<collection>:<action>/<collectionIndex>
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<GET|POST> /api/<collection>/<collectionIndex>/<association>:<action>
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<GET|POST> /api/<collection>/<collectionIndex>/<association>:<action>/<associationIndex>
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```
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### 示例
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posts 资源
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```bash
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POST /api/posts:create
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GET /api/posts:list
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GET /api/posts:get/1
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POST /api/posts:update/1
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POST /api/posts:destroy/1
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```
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posts.comments 资源
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```bash
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POST /api/posts/1/comments:create
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GET /api/posts/1/comments:list
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GET /api/posts/1/comments:get/1
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POST /api/posts/1/comments:update/1
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POST /api/posts/1/comments:destroy/1
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```
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posts.tags 资源
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```bash
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POST /api/posts/1/tags:create
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GET /api/posts/1/tags:get
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GET /api/posts/1/tags:list
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POST /api/posts/1/tags:update
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POST /api/posts/1/tags:destroy
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POST /api/posts/1/tags:add
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GET /api/posts/1/tags:remove
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```
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## 资源定位
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- collection 资源,通过 `collectionIndex` 定位到待处理的数据,`collectionIndex` 必须唯一
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- association 资源,通过 `collectionIndex` 和 `associationIndex` 联合定位待处理的数据,`associationIndex` 可能不是唯一的,但是 `collectionIndex` 和 `associationIndex` 的联合索引必须唯一
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查看 association 资源详情时,请求的 URL 需要同时提供 `<collectionIndex>` 和 `<associationIndex>`,`<collectionIndex>` 并不多余,因为 `<associationIndex>` 可能不是唯一的。
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例如 `tables.fields` 表示数据表的字段
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```bash
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GET /api/tables/table1/fields/title
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GET /api/tables/table2/fields/title
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```
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table1 和 table2 都有 title 字段,title 在 table1 里是唯一的,但是其他表也可能有 title 字段
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## 请求参数
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请求的参数可以放在 Request 的 headers、parameters(query string)、body(GET 请求没有 body) 里。
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几个特殊的 Parameters 请求参数
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- `filter` 数据过滤,用于查询相关操作里;
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- `filterByTk` 根据 tk 字段字过滤,用于指定详情数据的操作里;
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- `sort` 排序,用于查询相关操作里。
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- `fields` 输出哪些数据,用于查询相关操作里;
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- `appends` 附加关系字段,用于查询相关操作里;
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- `except` 排除哪些字段(不输出),用于查询相关操作里;
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- `whitelist` 字段白名单,用于数据的创建和更新相关操作里;
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- `blacklist` 字段黑名单,用于数据的创建和更新相关操作里;
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### filter
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数据过滤
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```bash
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# simple
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GET /api/posts?filter[status]=publish
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# 推荐使用 json string 的格式,需要 encodeURIComponent 编码
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GET /api/posts?filter={"status":"published"}
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# filter operators
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GET /api/posts?filter[status.$eq]=publish
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GET /api/posts?filter={"status.$eq":"published"}
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# $and
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GET /api/posts?filter={"$and": [{"status.$eq":"published"}, {"title.$includes":"a"}]}
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# $or
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GET /api/posts?filter={"$or": [{"status.$eq":"pending"}, {"status.$eq":"draft"}]}
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# association field
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GET /api/posts?filter[user.email.$includes]=gmail
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GET /api/posts?filter={"user.email.$includes":"gmail"}
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```
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[点此查看更多关于 filter operators 的内容](http-api/filter-operators)
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### filterByTk
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根据 tk 字段过滤,默认情况:
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- collection 资源,tk 为数据表的主键;
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- association 资源,tk 为 association 的 targetKey 字段。
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```bash
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GET /api/posts:get?filterByTk=1&fields=name,title&appends=tags
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```
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### sort
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排序。降序时,字段前面加上减号 `-`。
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```bash
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# createAt 字段升序
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GET /api/posts:get?sort=createdAt
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# createAt 字段降序
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GET /api/posts:get?sort=-createdAt
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# 多个字段联合排序,createAt 字段降序、title A-Z 升序
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GET /api/posts:get?sort=-createdAt,title
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```
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### fields
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输出哪些数据
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```bash
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GET /api/posts:list?fields=name,title
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Response 200 (application/json)
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{
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"data": [
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{
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"name": "",
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"title": ""
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}
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],
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"meta": {}
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}
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```
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### appends
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附加关系字段
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### except
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排除哪些字段(不输出),用于查询相关操作里;
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### whitelist
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白名单
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```bash
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POST /api/posts:create?whitelist=title
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{
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"title": "My first post",
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"date": "2022-05-19" # date 字段会被过滤掉,不会写入数据库
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}
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```
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### blacklist
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黑名单
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```bash
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POST /api/posts:create?blacklist=date
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2022-12-23 10:27:00 +00:00
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# date 字段会被过滤掉,不会写入数据库
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2022-10-31 14:41:24 +00:00
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{
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2022-12-23 10:27:00 +00:00
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"title": "My first post"
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2022-10-31 14:41:24 +00:00
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}
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```
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## 请求响应
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响应的格式
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```ts
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type ResponseResult = {
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data?: any; // 主体数据
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meta?: any; // 附加数据
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errors?: ResponseError[]; // 报错
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};
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type ResponseError = {
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code?: string;
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message: string;
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};
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```
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### 示例
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查看列表
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```bash
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GET /api/posts:list
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Response 200 (application/json)
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{
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data: [
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{
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id: 1
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}
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],
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meta: {
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count: 1
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page: 1,
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pageSize: 1,
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totalPage: 1
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},
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}
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```
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查看详情
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```bash
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GET /api/posts:get/1
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Response 200 (application/json)
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{
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data: {
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id: 1
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},
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}
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```
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报错
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```bash
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POST /api/posts:create
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Response 400 (application/json)
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{
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errors: [
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{
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message: 'name must be required',
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},
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],
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}
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```
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