在运行nestjs并达到任何端点时看不到console.log（）或记录器消息

Question

在尝试访问任何端点时，我在 IDE 控制台中看不到任何状态或控制台消息。我确实看到返回响应，但控制台中没有调用详细信息。我很困惑为什么它会这样？

以下是我在运行npm run-script start:dev 时看到的 -

> nest start --watch
[3:04:44 PM] Starting compilation in watch mode...


[Nest] 14340   - 05/20/2020, 3:10:58 PM   [NestFactory] Starting Nest application...
[Nest] 14340   - 05/20/2020, 3:10:58 PM   [InstanceLoader] TypeOrmModule dependencies initialized +220ms
[Nest] 14340   - 05/20/2020, 3:10:58 PM   [InstanceLoader] TypeOrmCoreModule dependencies initialized +195ms
[Nest] 14340   - 05/20/2020, 3:10:58 PM   [InstanceLoader] TypeOrmModule dependencies initialized +6ms
[Nest] 14340   - 05/20/2020, 3:10:58 PM   [InstanceLoader] AppModule dependencies initialized +5ms
[Nest] 14340   - 05/20/2020, 3:10:58 PM   [RoutesResolver] AppController {}: +13ms
[Nest] 14340   - 05/20/2020, 3:10:58 PM   [RouterExplorer] Mapped {, GET} route +4ms
[Nest] 14340   - 05/20/2020, 3:10:58 PM   [RoutesResolver] BatchController {/batch}: +1ms
[Nest] 14340   - 05/20/2020, 3:10:58 PM   [RouterExplorer] Mapped {/batch, POST} route +1ms
[Nest] 14340   - 05/20/2020, 3:10:58 PM   [RouterExplorer] Mapped {/batch, GET} route +1ms
[Nest] 14340   - 05/20/2020, 3:10:58 PM   [RouterExplorer] Mapped {/batch/:batch, GET} route +1ms
[Nest] 14340   - 05/20/2020, 3:10:58 PM   [RouterExplorer] Mapped {/batch/:batch, DELETE} route +1ms
[Nest] 14340   - 05/20/2020, 3:10:58 PM   [RoutesResolver] StudentController {/student}: +0ms
[Nest] 14340   - 05/20/2020, 3:10:58 PM   [RouterExplorer] Mapped {/student, POST} route +2ms
[Nest] 14340   - 05/20/2020, 3:10:58 PM   [RouterExplorer] Mapped {/student, GET} route +1ms
[Nest] 14340   - 05/20/2020, 3:10:58 PM   [RouterExplorer] Mapped {/student/:id, GET} route +1ms
[Nest] 14340   - 05/20/2020, 3:10:58 PM   [RouterExplorer] Mapped {/student/:id, DELETE} route +2ms
[Nest] 14340   - 05/20/2020, 3:10:59 PM   [RoutesResolver] AssignmentController {/assignment}: +1ms
[Nest] 14340   - 05/20/2020, 3:10:59 PM   [RouterExplorer] Mapped {/assignment, POST} route +1ms
[Nest] 14340   - 05/20/2020, 3:10:59 PM   [RouterExplorer] Mapped {/assignment, GET} route +1ms
[Nest] 14340   - 05/20/2020, 3:10:59 PM   [RouterExplorer] Mapped {/assignment/:id, GET} route +2ms
[Nest] 14340   - 05/20/2020, 3:10:59 PM   [RouterExplorer] Mapped {/assignment/:id, DELETE} route +1ms
[Nest] 14340   - 05/20/2020, 3:10:59 PM   [RoutesResolver] UploadController {/upload}: +1ms
[Nest] 14340   - 05/20/2020, 3:10:59 PM   [RouterExplorer] Mapped {/upload, POST} route +2ms
[Nest] 14340   - 05/20/2020, 3:10:59 PM   [NestApplication] Nest application successfully started +3ms

当我点击http://localhost:3000/batch 时，我看到了响应，但上面的控制台没有显示类似API 类型GET 或状态200 等的任何内容。

这就是我在控制器中的 -

import {
  Controller,
  Get,
  Post,
  Body,
  Param,
  Delete,
  Logger,
} from '@nestjs/common';
import { BatchService } from './batch.service';
import { Batch } from './batch.entity';
import { InsertResult } from 'typeorm';

@Controller('batch')
export class BatchController {
  private readonly logger = new Logger(BatchController.name);

  constructor(private batchService: BatchService) {}
  @Post()
  create(@Body() batchDto: Batch): Promise<InsertResult> {
    this.logger.log(':: BatchController :: create()');
    console.log(':: BatchController :: create()');
    return this.batchService.create(batchDto);
  }

  @Get()
  findAll(): Promise<Batch[]> {
    this.logger.log(':: BatchController :: findAll()');
    console.log(':: BatchController :: findAll()');
    return this.batchService.findAll();
  }

  @Get(':batch')
  findOne(@Param('batch') batchName): Promise<Batch> {
    this.logger.log(':: BatchController :: findOne()');
    console.log(':: BatchController :: findOne()');
    return this.batchService.findOne(batchName);
  }

  @Delete(':batch')
  remove(@Param('batch') batchName) {
    this.logger.log(':: BatchController :: remove()');
    console.log(':: BatchController :: remove()');
    return this.batchService.remove(batchName);
  }
}

把console 和logger 都放上，看看有没有用。

Answer 1

您的 NestJS 应用程序似乎已禁用日志。 启用 NestJS 请求日志记录的最佳且简单的方法是使用其内置的记录器服务。 为此，您可以在引导 NestJS 应用程序时传递一个 LogLevels 数组。

在您的 main.ts 或任何您正在引导 Nest 应用程序的地方，

const app = await NestFactory.create<NestExpressApplication>(AppModule, new ExpressAdapter(), {
    cors: true,
    logger: ['error', 'warn', 'log'] // <--- Add this line in options object
});

在这里，在options.logger 中传递LogLevels 的数组。

到目前为止，LogLevel 类型具有以下适用值：

declare type LogLevel = 'log' | 'error' | 'warn' | 'debug' | 'verbose';

（代码 sn-p 取自 @nestjs/common）

现在再次运行该项目，它应该会在控制台中打印请求日志。

Answer 2

几乎可以肯定有一些主机设置会阻止正常行为。我会联系我的托管服务提供商以了解它，但我是如何获得这些信息的：

我的 NestJS 应用停止发送电子邮件。我从 NestJS 教程中实现了 Logger - 没有输出。

我添加了 console.log/error - 没有输出

我已经从主机中删除了我所有的应用程序文件，只留下了 1 个 app.js 文件，其中包含一个简单的代码 sn-p：

const http = require("http");
const port = 80;

const server = http.createServer((req, res) => {
  res.statusCode = 200;
  res.setHeader("Content-Type", "text/plain");
  res.end("Hello World");
});

server.listen(port, () => {
  console.log("I WILL BE LOGGED1?");
  process.stdout.write("I WILL BE LOGGED2?");
  process.stderr.write("I WILL BE LOGGED3?");
});

并注意到无论您做什么，都只会记录“process.stderr.write”。所以目前我只使用那段代码来记录信息。

Answer 3

const app = await NestFactory.create(AppModule, {
    logger: console
});

上面的代码将启用 Nest 控制台输出。