无法使工作环回4与PostgreSQL连接的待办事项列表教程

npm install -g @loopback/cli

lb4 app todo-list

lb4 model

import {inject} from '@loopback/core';
import {juggler} from '@loopback/repository';

const config = {
  name: 'postgres',
  connector: 'postgresql',
  url: 'postgres://username:password@localhost/dbname',
  host: 'localhost',
  port: 5432,
  user: 'username',
  password: 'password',
  database: 'dbname',
};

export class PostgresDataSource extends juggler.DataSource {
  static dataSourceName = 'postgres';
  static readonly defaultConfig = config;

  constructor(
    @inject('datasources.config.postgres', {optional: true})
    dsConfig: object = config,
  ) {
    super(dsConfig);
  }
}

import {TodoController} from './controllers';
import {TodoRepository} from './repositories';

export class TodoListApplication extends BootMixin(
  ServiceMixin(RepositoryMixin(RestApplication)),
) {
  constructor(options: ApplicationConfig = {}) {
    // ...
    this.controller(TodoController);
    this.repository(TodoRepository);
    // ...
  }
}

npm start