“createConnection”已弃用

Question

我正在用 Graphql 在 Node 中创建我的第一个应用程序，现在我只写了这段代码：

import 'reflect-metadata';
const express = require('express');
import { Express } from 'express';
import { ApolloServer } from 'apollo-server-express';
import { ApolloServerPluginLandingPageGraphQLPlayground } from 'apollo-server-core';
import { buildSchema } from 'type-graphql';
import { ActivityResolver } from './resolvers/activity';
import { createConnection } from 'typeorm';

const main = async () => {
    // Setup database connection
    const conn = await createConnection({
        type: 'postgres',
        database: 'deliveryapi',
        entities: [],
        logging: true,
        synchronize: true,
        username: process.env.USERNAME || 'postgres', 
        password: process.env.PASSWORD || 'Juventus',
        port: 5432,
    });

    // Create express application for GraphQL server
    const apollo: ApolloServer = new ApolloServer({
        schema: await buildSchema({
            resolvers: [ActivityResolver],
            validate: false,
        }),
        plugins: [ApolloServerPluginLandingPageGraphQLPlayground()],
    })
    const app: Express = express();

    // All application required varibles
    const PORT = process.env.PORT || 5000;

    // Middleware and routes
    await apollo.start();
    apollo.applyMiddleware({ app });
    app.use(express.json());
    app.get('/', (req, res) => {res.send("Hello World")});

    // Start server
    app.listen(PORT, () => {console.log(`Server started on port ${PORT} and connected to database`)});

}

main().catch(err => {console.error("Error: ", err)});

问题是，在 VSCode 中，这一行有问题：

import { createConnection } from 'typeorm';

。它已被删除并表示已弃用，我不明白为什么会影响代码。我正在使用打字稿。

有人可以解释一下吗？谢谢

Answer 1

自

0.3.0

版本

typeorm

以来，

createConnection

已弃用，取而代之的是新的

DataSoure

API。请参阅

0.3.0

的变更日志 https://github.com/typeorm/typeorm/blob/master/CHANGELOG.md

也看看：https://typeorm.io/data-source

Answer 2

当我在玩 typeORM 时，刚刚发现你可以把它放到你的

index.ts

文件中

import { AppDataSource } from "./data-source";
AppDataSource.initialize().then(() => {
console.log("Data Source has been initialized!");}).catch((err) => {
console.error("Error during Data Source initialization", err);});