我正在做一个课程，我们正在使用express-node postgres和react（使用typescript）和typeORM。到目前为止，一切都运行良好，但我面临着typeORM的问题，我不知道发生了什么，为什么会发生这个错误

大问题：所以，问题是，我正在进行身份验证，在某个时候我们更改了数据库中的用户模式，因此我们必须进行迁移，但是，在迁移之前，我们执行了npm run typeorm schema:drop，但是当我尝试时，迁移发生了这种情况

这是我使用的第一个命令

npm run typeorm migration:generate -- --n create-users-table

这就是错误

> 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

经过几个小时的尝试到处寻找解决方案，我将最后一个命令更改为以下命令

npx typeorm migration:generate -- --n create-users-table

这次的错误是不同的，看起来像这样

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，但是...经过几个小时（再次）寻找一个新的答案，我找不到任何东西，所以，我需要写这篇文章来解决我的问题。所以现在，让我向你展示我的ormconfig，我的package.json和我想在postgres DB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备注：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"
  }
}

最后我想展示的是，尽管它可能不是那么重要，这是用户模式

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，如果你能帮我这个，你会保存我的命.最后一件事是，我试图张贴我的问题首先在西班牙语网站的堆栈溢出，但没有人可以帮助我，所以也许有人会在这里，感谢您的时间和照顾！