【发布时间】：2021-08-02 00:24:27
【问题描述】：
我正在做一门课程，我们使用 express-node postgres 并做出反应（使用打字稿）和 typeORM。到目前为止一切都运行良好，但我遇到了 typeORM 的问题，我不知道发生了什么以及为什么会发生此错误
大问题：所以，问题在于，我正在执行身份验证，并且在某些时候我们更改了数据库中的用户架构，因此我们必须进行迁移，但是，在迁移之前，我们做了npm run typeorm schema:drop，但是当我尝试时，这发生在迁移
这是我使用的第一个命令
npm run typeorm migration:generate -- --n create-users-table
这是错误
> new-typeorm-project@0.0.1 typeorm C:\Users\diego cifuentes\Desktop\Studying Backend\redit> ts-node ./node_modules/typeorm/cli.js "migration:generate" "create-users-table"
bin.js migration:generate
Generates a new migration file with sql needs to be executed to update
schema.
Opciones:
-h, --help Muestra ayuda [booleano] -c, --connection Name of the connection on which run a query.
[defecto: "default"] -n, --name Name of the migration class.
[cadena de caracteres] [requerido] -d, --dir Directory where migration should be created.
-p, --pretty Pretty-print generated SQL
[booleano] [defecto: false] -f, --config Name of the file with connection configuration.
[defecto: "ormconfig"] -o, --outputJs Generate a migration file on Javascript instead of
Typescript [booleano] [defecto: false] --dr, --dryrun Prints out the contents of the migration instead of
writing it to a file [booleano] [defecto: false] --ch, --check Verifies that the current database is up to date and that no migrations are needed. Otherwise exits with
code 1. [booleano] [defecto: false] -v, --version Muestra número de versión [booleano]
Falta argumento requerido: n
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! new-typeorm-project@0.0.1 typeorm: `ts-node ./node_modules/typeorm/cli.js "migration:generate" "create-users-table"`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the new-typeorm-project@0.0.1 typeorm script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm ERR! A complete log of this run can be found in:
npm ERR! C:\Users\diego cifuentes\AppData\Roaming\npm-cache\_logs\2021-05-11T15_29_02_081Z-debug.log
几个小时后试图到处寻找解决方案，我将最后一个命令更改为这个
npx typeorm migration:generate -- --n create-users-table
而且这次的错误不一样，看起来是这样的
No changes in database schema were found - cannot generate a migration. To create a new empty migration use "typeorm migration:create" command
所以，我说，好吧，我越来越接近解决这个问题了，但是......经过数小时（再次）寻找新答案后，我找不到任何东西，所以，我要说到点子上了我需要在哪里写这篇文章以解决我的问题。那么现在，让我向您展示我的 ormconfig、我的 package.json 以及我想要在我的 postgres 数据库中迁移的实体。
package.json（脚本typeorm在最后）
{
"name": "new-typeorm-project",
"version": "0.0.1",
"description": "Awesome project developed with TypeORM.",
"devDependencies": {
"@types/bcrypt": "^5.0.0",
"@types/cookie": "^0.4.0",
"@types/cookie-parser": "^1.4.2",
"@types/express": "^4.17.11",
"@types/jsonwebtoken": "^8.5.1",
"@types/morgan": "^1.9.2",
"@types/node": "^15.0.2",
"morgan": "^1.10.0",
"nodemon": "^2.0.7",
"ts-node": "^9.1.1",
"typescript": "^4.2.4"
},
"dependencies": {
"bcrypt": "^5.0.1",
"class-transformer": "^0.4.0",
"class-validator": "^0.13.1",
"cookie": "^0.4.1",
"cookie-parser": "^1.4.5",
"dotenv": "^9.0.1",
"express": "^4.17.1",
"jsonwebtoken": "^8.5.1",
"pg": "^8.4.0",
"reflect-metadata": "^0.1.10",
"typeorm": "0.2.32"
},
"scripts": {
"start": "ts-node src/server.ts",
"dev": "nodemon --exec ts-node src/server.ts",
"typeorm": "ts-node ./node_modules/typeorm/cli.js"
}
}
ormconfing.json 快速说明：我将实体、迁移和订阅者更改为 .js，因为 .ts 总是给我错误。
{
"type": "postgres",
"host": "localhost",
"port": 5432,
"username": "**",
"password": "**",
"database": "**",
"synchronize": true,
"logging": true,
"entities": ["src/entities/**/*.js"],
"migrations": ["src/migrations/**/*.js"],
"subscribers": ["src/subscribers/**/*.js"],
"cli": {
"entitiesDir": "src/entities",
"migrationsDir": "src/migrations",
"subscribersDir": "src/subscribers"
}
}
最后我想告诉你的，虽然它可能不是那么重要，但这是用户架构
import {
Entity as TOEntity,
Column,
Index,
BeforeInsert,
OneToMany
} from "typeorm";
import bcrypt from "bcrypt";
import { IsEmail, Length } from "class-validator";
import { Exclude } from "class-transformer";
import Entity from "./Entity";
// import Post from "./Post";
@TOEntity("users")
export default class User extends Entity {
constructor(user: Partial<User>) {
super();
Object.assign(this, user);
}
@Index()
@IsEmail()
@Column({ unique: true })
email: string;
@Index()
@Length(3, 200)
@Column({ unique: true })
username: string;
@Exclude()
@Length(6, 200)
@Column()
password: string;
// @OneToMany(() => Post, post => post.user)
// posts: Post[];
@BeforeInsert()
async hashedPassword() {
this.password = await bcrypt.hash(this.password, 6);
}
}
最终目标：所以，如果你能帮我解决这个问题，你会救我的命。最后一件事是我试图先在堆栈溢出的西班牙语网站上发布我的问题，但没有人可以帮助我，所以也许这里有人会，感谢您的时间并保重！
【问题讨论】：
标签： node.js postgresql npm typeorm