Question

是否可以像这里一样使用连接类provide？

import { Connection, createConnection } from 'typeorm';

export const databaseProviders = [{
  provide: Connection,
  useFactory: async () => await createConnection({
    type: 'postgres',
    host: 'localhost',
    port: 5432,
    username: 'postgres',
    password: 'postgres',
    database: 'testo',
    entities: [
      __dirname + '/../**/*.entity{.ts,.js}',
    ],
    logging: true,
    synchronize: true,
  }),
}];

使导入的工作方式如下：

constructor(
  private connection: Connection,
) {
  this.repository = connection.getRepository(Project);
}

在这种情况下nestjs无法找到依赖项。我想问题出在typeorm，它被编译成简单的es5函数。但也许有解决方案吗？

repository to reproduce

更新

我找到了可接受的解决方案nestjs typeorm module，但不明白为什么我的Connection类没有工作，但它适用于字符串。希望@ kamil-myśliwiec将有助于理解。

  modules: [
    TypeOrmModule.forRoot(
      [
        Build,
        Project,
      ],
      {
        type: 'postgres',
        host: 'localhost',
        port: 5432,
        username: 'postgres',
        password: 'postgres',
        database: 'testo',
        entities: [
          Build,
        ],
        logging: true,
        synchronize: true,
      }),
  ],
  // And the n inject like this by entity name
  @InjectRepository(Build) private repository: Repository<Build>,

Answer 1

在这里，我将分享一些示例，这些示例可以帮助您解决或重现此问题。

在Config / config.ts

import "reflect-metadata";
import { ConnectionOptions } from "typeorm";
import { abctable } from "../DatabaseEntities/abctable";
import { deftable } from "../DatabaseEntities/deftable";
import { ghitable } from "../DatabaseEntities/ghitable";

export let dbOptions: ConnectionOptions = {
    type: "DatabaseType",
    host: "HostAddress",
    port: Port,
    username: "UserName",
    password: "Password",
    database: "DatabaseName",
    entities: [abctable, deftable, ghitable],
    synchronize: true
}

在server.ts中

import { createConnection, createConnections } from 'typeorm';
import * as appConfig from './Config/config';

createConnection(appConfig.dbOptions).then(async connection => {

    console.log("Connected to DB");
}).catch(error => console.log("TypeORM connection error: ", error));

谢谢

Typeorm连接提供程序作为Connection类

1 个答案: