feat(ORM): 新增Sequelize教程文档、代码

Author: 142vip.cn

code/koa/koa-run-sort.js

@@ -9,7 +9,8 @@ app.use(async(ctx, next) => {
   const middleRes1 = await next()
   console.log('middleware1===>', middleRes1)
   const rt = ctx.response.get('X-Response-Time')
-  console.log(`请求信息：${ctx.method}-${ctx.url} - ${rt}`)
+  const { method, url } = ctx
+  console.log(`请求信息：${method}-${url} - ${rt}`)
   return 'back middleware1 result'
 })
 

code/orm/sequelize/apis-demo/query-apis.js

@@ -0,0 +1,71 @@
+const { Sequelize, Model, DataTypes, Op } = require('sequelize')
+const sequelize = new Sequelize('postgres://user:pass@142vip.cn:5432/142vip')
+
+/**
+ * 定义用户表模型
+ */
+const User = sequelize.define('user', {
+  name: DataTypes.TEXT,
+  favoriteColor: {
+    type: DataTypes.TEXT,
+    // 默认值
+    defaultValue: 'green'
+  },
+  age: DataTypes.INTEGER
+})
+
+const users = User.findAll()
+
+const user2 = User.findAll({
+  attributes: ['name']
+})
+
+const user3 = User.findAll({
+  attributes: [
+    'name',
+    [sequelize.fn('count', sequelize.col('age')), 'countAge']
+  ]
+})
+
+const user4 = User.findAll({
+  attributes: {
+    include: ['name']
+  }
+})
+
+const user5 = User.findAll({
+  attributes: {
+    include: [sequelize.fn('count', sequelize.col('age')), 'countAge']
+  }
+})
+
+// 排除name数据列
+const user6 = User.findAll({
+  attributes: {
+    exclude: ['name']
+  }
+})
+
+const user7 = User.findAll({
+  where: {
+    name: '142vip.cn'
+  }
+})
+
+
+const user8 = User.findAll({
+  where: {
+    name: {
+      [Op.eq]: '142vip.cn'
+    }
+  }
+})
+
+const user9 = User.findOrCreate({
+  where: {
+    name: '142vip.cn'
+  }
+})
+
+
+const user10 = User.findAndCountAll({})

code/orm/sequelize/db-curd-demo/app.js

@@ -0,0 +1,8 @@
+const { Sequelize, DataTypes } = require('sequelize')
+const { UserModel } = require('./user')
+const sequelize = new Sequelize('sqlite::memory:')
+
+const User = sequelize.define('User', UserModel)
+
+// `sequelize.define` 会返回模型
+console.log(User === sequelize.models.User) // true

code/orm/sequelize/db-curd-demo/db-create.js

@@ -0,0 +1,25 @@
+const { Sequelize, DataTypes, Model } = require('sequelize')
+const { UserModel } = require('./user')
+const sequelize = new Sequelize('sqlite::memory')
+
+
+/**
+ * 继承Model类型，使用使用init方法注册模型
+ */
+class User extends Model {
+
+}
+
+/**
+ * 初始化模型
+ */
+User.init(UserModel, {
+  // 连接实例
+  sequelize,
+  // 指定模型绑在sequelize对象上的名称
+  modelName: 'User'
+})
+
+// 定义的模型就是User类本身
+console.log(User === sequelize.models.User) // true
+

code/orm/sequelize/db-curd-demo/db-update.js

@@ -0,0 +1,27 @@
+const { DataTypes } = require('sequelize')
+
+export const UserModel = {
+  /**
+   * 名称
+   */
+  name: DataTypes.STRING,
+
+  /**
+   * 年龄
+   */
+  age: DataTypes.INTEGER,
+  /**
+   * 性别
+   */
+  gender: {
+    type: DataTypes.BOOLEAN,
+    // 默认值
+    defaultValue: 1
+  },
+  /**
+   * 出生日期
+   */
+  birth: {
+    type: DataTypes.DATE
+  }
+}

code/orm/sequelize/db-curd-demo/db/user-define.js

@@ -0,0 +1,16 @@
+{
+  "name": "db-curd-demo",
+  "version": "0.0.1",
+  "description": "SequelizeORM框架的一些增删改查操作",
+  "dependencies": {
+    "sequelize": "^6.35.1"
+  },
+  "scripts": {
+    "dev": "node app.js"
+  },
+  "author": {
+    "name": "微信公众号：储凡",
+    "email": "fairy_vip@2925.com"
+  },
+  "license": "MIT"
+}