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    --- tags: JS 直播班 - 2022 秋季班 --- # JSON server 教學 # json-server - 不會後端也能自己開 REST API 教學目標:讓找不到好 API 的學生,也能自己寫 API 來練習,找到前端工作 * [影片 JSON SERVER](https://www.youtube.com/watch?v=9TAanXxNvEI) * [JSON-SERVER](https://github.com/typicode/json-server) * [線上操作](https://whispering-mountain-14537.herokuapp.com/) * [git 範例](https://github.com/gonsakon/jsonServerSample) * [postman](https://www.getpostman.com/) * [Youtube 部署影片](https://www.youtube.com/watch?v=DGPw2LzY0sY&feature=youtu.be) - [ ] 講解後端與前端的觀念 - [ ] 關聯資料庫(https://www.youtube.com/watch?v=gDIX80yDgR0) ![](https://i.imgur.com/3pzlwmV.png) ![](https://i.imgur.com/NZjuWii.png) ![](https://i.imgur.com/RSYkQTn.png) ## json-sever 操作流程 ### 步驟一:安裝[Node.js](https://nodejs.org/en/) ### 步驟二:安裝 NPM ``` npm install -g json-server ``` ### 步驟三:新增一個 `db.json` ``` { "posts": [ { "id": 1, "title": "json-server", "author": "typicode" } ], "comments": [ { "id": 1, "body": "some comment", "postId": 1 } ], "profile": { "name": "typicode" } } ``` ### 步驟四:啟動伺服器 ``` json-server --watch db.json ``` ## **RESTful API** 細節分享 * GET:取得資料 * POST :新增資料 * PUT:修改資料 (完整) * *PATCH:修改資料 (局部)* - [x] 新增一筆資料時,會固定附帶 id 值,他也會是 router 的條件 ## json-server 功能 ### filter 篩選資料 ``` GET /posts?title=json-server&author=typicode GET /posts?id=1&id=2 GET /comments?author.name=typicode ``` ### q = 搜尋全文 - [x] filer:依照 key 去搜尋 - [x] q:依照全文進行檢索 ### Paginate 頁碼 `page` 頁數、`limit` 一頁幾筆 ``` `GET /posts?_page=7 GET /posts?_page=7&_limit=20` ``` ### 字串與數值大小於 * _gte 大於等於(數值) * _lte 小於等於 (數值) * _ne 不等於 (數值) ``` `GET /posts?_page=7 GET /posts?_page=7&_limit=20` ``` ## json-server 細節 * 預設支援跨網域 CORS * 每筆資料都有 id * 根目錄新增 `public` ,可放靜態檔案 ## Q&A Q:可以拿來當作真正的伺服器嗎? A:不行,他是記錄在記憶體上,而非複寫檔案 Q:如何確保面試官看的內容都有資料? A:一開始在 db.json 將全部資料寫上即可 ## JSON-Server-Auth ### 分享大綱 1. 重新解釋資料關聯 2. 如何安裝 `JSON-Server-Auth` 3. 什麼是 token?有期限嗎? 4. `/register`、`/login` 介紹 5. token 設定:解釋與 JSON-SERVER 差異 6. 產品收藏功能實做 ``` npm install -g json-server json-server-auth express npm install json-server json-server-auth express ``` ### 常見 router 1. 取得 userId 為 2 的收藏列表:`GET:/users/2/bookmarks` 2. 將產品編號 1 加入收藏:`POST:/products/1/bookmarks` 3. 將 ID 資料關聯展開:`?_expand=product&_expand=user` ### 教學文件 * [Wei J 文章](https://weij0.github.io/Web/docs/tags/json-server) ![](https://i.imgur.com/CiGbkhL.png) ![](https://i.imgur.com/Qe2ZAtO.png)

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