我正在尝试使用带有Express和Typeorm的TypeScript创建项目。
在使用node dist/index.js进行编译后，尝试使用tsc运行服务器时，始终出现以下错误。
> typescript-express-boilerplate@1.0.0 start /home/yusta/Desktop/project
> npm run serve
> typescript-express-boilerplate@1.0.0 serve /home/yusta/Desktop/project
> node dist/index.js
Example index listening on port 3000!
/home/yusta/Desktop/project/src/entity/User.ts:1
(function (exports, require, module, __filename, __dirname) { import { Entity, PrimaryGeneratedColumn, Column } from "typeorm";
^
SyntaxError: Unexpected token {
at new Script (vm.js:79:7)
at createScript (vm.js:251:10)
at Object.runInThisContext (vm.js:303:10)
at Module._compile (internal/modules/cjs/loader.js:657:28)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:700:10)
at Module.load (internal/modules/cjs/loader.js:599:32)
at tryModuleLoad (internal/modules/cjs/loader.js:538:12)
at Function.Module._load (internal/modules/cjs/loader.js:530:3)
at Module.require (internal/modules/cjs/loader.js:637:17)
at require (internal/modules/cjs/helpers.js:22:18)
有趣的是，运行ts-node src/index.ts可以正常工作：
Example index listening on port 3000!
Saved a new user with id: 2
Loading users from the database...
Loaded users: [ User { id: 2, email: 'hello@hello.com', password: 'password' } ]
我认为tsconfig.json存在问题，但是我已经将module设置为commonjs，如下所示。
tsconfig.json
{
"compilerOptions": {
"module": "commonjs",
"esModuleInterop": true,
"target": "es2018",
"noImplicitAny": true,
"moduleResolution": "node",
"sourceMap": true,
"outDir": "dist",
"baseUrl": ".",
"paths": {
"*": [
"node_modules/*",
"src/types/*"
]
},
"emitDecoratorMetadata": true,
"experimentalDecorators": true,
},
"include": [
"src/**/*"
]
}
package.json
{
"name": "typescript-express-boilerplate",
"version": "1.0.0",
"description": "Boilerplate project for TypeScript with ExpressJS.",
"engines": {
"node": "10.x"
},
"scripts": {
"start": "npm run serve",
"serve": "node dist/index.js",
"build": "npm run tslint && npm run build:ts",
"build:ts": "tsc",
"dev": "concurrently -k -p \"[{name}]\" -n \"TypeScript,Node\" -c \"cyan.bold,green.bold\" \"npm run watch:ts\" \"npm run watch:node\"",
"watch:node": "nodemon dist/index.js",
"watch:ts": "tsc -w",
"tslint": "tslint -c tslint.json -p tsconfig.json",
"heroku-postbuild": "npm install && npm run build"
},
"author": "",
"license": "ISC",
"dependencies": {
"bcryptjs": "^2.4.3",
"express": "^4.16.4",
"oauth2orize": "^1.11.0",
"passport": "^0.4.0",
"passport-http-bearer": "^1.0.1",
"pg": "^7.8.1",
"reflect-metadata": "^0.1.13",
"typeorm": "^0.2.14"
},
"devDependencies": {
"@types/express": "^4.16.1",
"@types/node": "^11.10.4",
"@types/oauth2orize": "^1.8.5",
"@types/passport": "^1.0.0",
"@types/passport-http-bearer": "^1.0.33",
"concurrently": "^4.1.0",
"nodemon": "^1.18.10",
"tslint": "^5.13.0",
"typescript": "^3.3.3333"
}
}
index.ts
import "reflect-metadata";
import express from "express";
import { createConnection } from "typeorm";
import { User } from "./entity/User";
createConnection().then(async connection => {
const user = new User();
user.email = "hello@hello.com";
user.password = "password";
await connection.manager.save(user);
console.log("Saved a new user with id: " + user.id);
console.log("Loading users from the database...");
const users = await connection.manager.find(User);
console.log("Loaded users: ", users);
}).catch(error => console.log(error));
// Create a new express application instance
const app: express.Application = express();
app.get("/", function (req: express.Request, res: express.Response) {
res.send("Hello World!");
});
app.listen(process.env.PORT || 3000, function () {
console.log("Example index listening on port 3000!");
});
实体/User.ts
import { Entity, PrimaryGeneratedColumn, Column } from "typeorm";
@Entity()
export class User {
@PrimaryGeneratedColumn()
id: number;
@Column({
length: 30
})
email: string;
@Column()
password: string;
}
谢谢。
编辑：
已编译的JavaScript代码没有ES6导入语句，它使用commonjs模块：
index.js
"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
require("reflect-metadata");
const express_1 = __importDefault(require("express"));
const typeorm_1 = require("typeorm");
const User_1 = require("./entity/User");
typeorm_1.createConnection().then(async (connection) => {
const user = new User_1.User();
user.email = "hello@hello.com";
user.password = "password";
await connection.manager.save(user);
console.log("Saved a new user with id: " + user.id);
console.log("Loading users from the database...");
const users = await connection.manager.find(User_1.User);
console.log("Loaded users: ", users);
}).catch(error => console.log(error));
// Create a new express application instance
const app = express_1.default();
app.get("/", function (req, res) {
res.send("Hello World!");
});
app.listen(process.env.PORT || 3000, function () {
console.log("Example index listening on port 3000!");
});
//# sourceMappingURL=index.js.map
实体/User.js
"use strict";
var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
return c > 3 && r && Object.defineProperty(target, key, r), r;
};
var __metadata = (this && this.__metadata) || function (k, v) {
if (typeof Reflect === "object" && typeof Reflect.metadata === "function") return Reflect.metadata(k, v);
};
Object.defineProperty(exports, "__esModule", { value: true });
const typeorm_1 = require("typeorm");
let User = class User {
};
__decorate([
typeorm_1.PrimaryGeneratedColumn(),
__metadata("design:type", Number)
], User.prototype, "id", void 0);
__decorate([
typeorm_1.Column({
length: 30
}),
__metadata("design:type", String)
], User.prototype, "email", void 0);
__decorate([
typeorm_1.Column(),
__metadata("design:type", String)
], User.prototype, "password", void 0);
User = __decorate([
typeorm_1.Entity()
], User);
exports.User = User;
//# sourceMappingURL=User.js.map
答案 0 :(得分：0)
在项目根目录（靠近package.json）中创建ormconfig.json。它应具有以下内容：
{
"type": "mysql",
"host": "localhost",
"port": 3306,
"username": "test",
"password": "test",
"database": "test"
}
答案 1 :(得分：0)
如果要在Node.js中运行代码，则需要告诉Typescript将ES模块语法转换为CommonJS。在您的tsconfig中：
"module": "commonjs",