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feat: typeorm-all-feature
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‎README.md‎

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[通过 mysql2 操作 mysql](./mysql2-test)
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[通过 typeorm 操作 mysql](./typeorm-test)
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[通过 typeorm 操作 mysql](./typeorm-mysql-test)
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[typeorm 全部特性](./typeorm-all-feature)

‎typeorm-all-feature/.gitignore‎

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.idea/
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.vscode/
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node_modules/
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build/
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tmp/
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temp/

‎typeorm-all-feature/README.md‎

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# typeorm all feature
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npm install
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修改连接配置
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npm run start

‎typeorm-all-feature/package.json‎

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{
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"name": "typeorm-all-feature",
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"version": "0.0.1",
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"description": "Awesome project developed with TypeORM.",
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"type": "commonjs",
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"devDependencies": {
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"@types/node": "^16.11.10",
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"ts-node": "10.7.0",
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"typescript": "4.5.2"
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},
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"dependencies": {
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"mysql": "^2.14.1",
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"mysql2": "^3.3.3",
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"reflect-metadata": "^0.1.13",
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"typeorm": "0.3.16"
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},
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"scripts": {
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"start": "ts-node src/index.ts",
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"typeorm": "typeorm-ts-node-commonjs"
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}
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}

‎typeorm-all-feature/src/UserSubscriber.ts‎

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import { EntitySubscriberInterface, EventSubscriber, InsertEvent } from 'typeorm';
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import { User } from './entity/User';
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@EventSubscriber()
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export class UserSubscriber implements EntitySubscriberInterface<User> {
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listenTo() {
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return User;
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}
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beforeInsert(event: InsertEvent<User>) {
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console.log(`Before user inserted: `, event.entity);
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}
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afterInsert(event: InsertEvent<User>) {
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console.log(`After user inserted: `, event.entity);
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}
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}

‎typeorm-all-feature/src/data-source.ts‎

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import "reflect-metadata"
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import { DataSource } from "typeorm"
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import { Aaa } from "./entity/Aaa"
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import { User } from "./entity/User"
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export const AppDataSource = new DataSource({
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type: "mysql",
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host: "localhost",
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port: 3306,
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username: "root",
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password: "guang",
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database: "practice",
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synchronize: true,
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logging: true,
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entities: [User, Aaa],
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migrations: [],
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subscribers: [],
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poolSize: 10,
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connectorPackage: 'mysql2',
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extra: {
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authPlugin: 'sha256_password',
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}
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})

‎typeorm-all-feature/src/entity/Aaa.ts‎

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import { Entity, PrimaryGeneratedColumn, Column } from "typeorm"
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@Entity({
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name: 't_aaa'
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})
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export class Aaa {
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@PrimaryGeneratedColumn({
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comment: '这是 id'
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})
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id: number
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@Column({
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name: 'a_aa',
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type: 'text',
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comment: '这是 aaa'
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})
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aaa: string
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@Column({
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unique: true,
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nullable: false,
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length: 10,
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width: 5,
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type: 'varchar',
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default: 'bbb'
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})
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bbb: string
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@Column({
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type: 'double',
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})
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ccc: number
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}

‎typeorm-all-feature/src/entity/User.ts‎

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import { Entity, PrimaryGeneratedColumn, Column } from "typeorm"
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@Entity()
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export class User {
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@PrimaryGeneratedColumn()
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id: number
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@Column()
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firstName: string
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@Column()
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lastName: string
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@Column()
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age: number
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}

‎typeorm-all-feature/src/index.ts‎

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import { In } from "typeorm";
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import { AppDataSource } from "./data-source"
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import { User } from "./entity/User"
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AppDataSource.initialize().then(async () => {
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const user = new User()
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user.id = 1;
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user.firstName = "aaa111"
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user.lastName = "bbb"
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user.age = 25
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await AppDataSource.manager.save(user);
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// await AppDataSource.manager.save(User, [
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// { firstName: 'ccc', lastName: 'ccc', age: 21},
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// { firstName: 'ddd', lastName: 'ddd', age: 22},
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// { firstName: 'eee', lastName: 'eee', age: 23}
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// ]);
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// await AppDataSource.manager.save(User, [
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// { id: 2 ,firstName: 'ccc111', lastName: 'ccc', age: 21},
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// { id: 3 ,firstName: 'ddd222', lastName: 'ddd', age: 22},
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// { id: 4, firstName: 'eee333', lastName: 'eee', age: 23}
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// ]);
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// await AppDataSource.manager.delete(User, 1);
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// await AppDataSource.manager.delete(User, [2,3]);
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// const users = await AppDataSource.manager.find(User);
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// console.log(users);
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// const users = await AppDataSource.manager.findBy(User, {
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// age: 23
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// });
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// console.log(users);
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// const [users, count] = await AppDataSource.manager.findAndCount(User);
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// console.log(users, count);
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// const [users, count] = await AppDataSource.manager.findAndCountBy(User, {
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// age: 23
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// })
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// console.log(users, count);
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// const user = await await AppDataSource.manager.findOne(User, {
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// select: {
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// firstName: true,
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// age: true
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// },
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// where: {
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// id: 4
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// },
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// order: {
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// age: 'ASC'
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// }
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// });
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// console.log(user);
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// const users = await await AppDataSource.manager.find(User, {
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// select: {
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// firstName: true,
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// age: true
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// },
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// where: {
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// id: In([4, 8])
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// },
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// order: {
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// age: 'ASC'
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// }
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// });
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// console.log(users);
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// const user = await AppDataSource.manager.findOneBy(User, {
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// age: 23
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// });
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// console.log(user);
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// try {
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// const user = await AppDataSource.manager.findOneOrFail(User, {
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// where: {
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// id: 666
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// }
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// });
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// console.log(user);
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// }catch(e) {
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// console.log(e);
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// console.log('没找到该用户');
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// }
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// const users = await AppDataSource.manager.query('select * from user where age in(?, ?)', [21, 22]);
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// console.log(users);
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// const queryBuilder = await AppDataSource.manager.createQueryBuilder();
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// const user = await queryBuilder.select("user")
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// .from(User, "user")
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// .where("user.age = :age", { age: 21 })
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// .getOne();
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// console.log(user);
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// const queryBuilder = await AppDataSource.manager.createQueryBuilder();
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// const query = queryBuilder.select('user.name', 'name')
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// .addSelect('COUNT(post.id)', 'count')
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// .from(User, 'user')
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// .leftJoin(Post, 'post', 'post.userId = user.id')
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// .where('user.id = :id')
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// .andWhere('post.isActive = :isActive')
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// .setParameters({ id: 1, isActive: true })
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// .groupBy('user.name')
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// .having('COUNT(post.id) > :postCount', { postCount: 2 });
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// const results = await query.getRawMany();
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// await AppDataSource.manager.transaction(async manager => {
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// await manager.save(User, {
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// id: 4,
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// firstName: 'eee',
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// lastName: 'eee',
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// age: 20
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// });
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// });
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}).catch(error => console.log(error))

‎typeorm-all-feature/tsconfig.json‎

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{
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"compilerOptions": {
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"lib": [
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"es5",
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"es6"
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],
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"target": "es5",
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"module": "commonjs",
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"moduleResolution": "node",
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"outDir": "./build",
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"emitDecoratorMetadata": true,
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"experimentalDecorators": true,
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"sourceMap": true
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}
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}

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