Implement basic logging

src/app.module.ts

@@ -1,5 +1,4 @@
 import { Module } from '@nestjs/common';
-import { DataSource } from 'typeorm';
 import { TypeOrmModule, TypeOrmModuleOptions } from '@nestjs/typeorm'; // DEBUG: Is this necessary? Docs unclear.
 import { DevtoolsModule } from '@nestjs/devtools-integration';
 import { AppController } from './app.controller';
@@ -7,8 +6,6 @@ import { AppService } from './app.service';
 import { Cat } from './cats/cats.entity';
 import { CatsModule } from './cats/cats.module';
 
-console.debug(`[AppModule] Starting...`)
-
 let dbConfig: TypeOrmModuleOptions;
 
 if ( process.env.NODE_ENV === 'production' ) {

src/app.service.ts

@@ -1,8 +1,11 @@
-import { Injectable } from '@nestjs/common';
+import { Injectable, Logger } from '@nestjs/common';
 
 @Injectable()
 export class AppService {
+  private readonly logger = new Logger(AppService.name);
+
   getHello(): string {
+    this.logger.log("[getHello] Starting...");
     return 'Hello World!';
   }
 }

src/cats/cats.controller.ts

@@ -4,13 +4,10 @@ import { Cat } from "./cats.entity";
 
 @Controller('cats')
 export class CatsController {
-  constructor(private catsService: CatsService) {
-    console.debug("[cats controller] Starting...");
-  }
+  constructor(private catsService: CatsService) {}
 
   @Get()
   findAll(): Promise<Cat[]> {
-    console.debug("[ctrl findAll] Starting...");
     return this.catsService.findAll();
   }
 

src/cats/cats.entity.ts

@@ -1,7 +1,5 @@
 import { Entity, Column, PrimaryGeneratedColumn } from "typeorm";
 
-console.debug('[cats entity] Starting...')
-
 @Entity()
 export class Cat {
   @PrimaryGeneratedColumn()

src/cats/cats.module.ts

@@ -4,8 +4,6 @@ import { CatsController } from "./cats.controller";
 import { CatsService } from "./cats.service";
 import { Cat } from "./cats.entity";
 
-console.debug("[cats module] Starting...");
-
 @Module({
   imports: [TypeOrmModule.forFeature([Cat])],
   providers: [CatsService],

src/cats/cats.service.ts

@@ -1,4 +1,4 @@
-import { Injectable } from "@nestjs/common";
+import { Injectable, Logger } from "@nestjs/common";
 import { InjectRepository } from "@nestjs/typeorm";
 import { Repository } from "typeorm";
 import { Cat } from "./cats.entity";
@@ -8,20 +8,22 @@ export class CatsService {
   constructor(
     @InjectRepository(Cat)
     private catsRepository: Repository<Cat>,
-  ) {
-    console.debug("[cats service] Starting...");
-  }
+  ) {}
+
+  private readonly logger = new Logger(CatsService.name);
 
   findAll(): Promise<Cat[]> {
-    console.log("[svc findAll] Starting...")
+    this.logger.log("[findAll] Starting...");
     return this.catsRepository.find();
   }
 
   findOne(id: number): Promise<Cat | null> {
+    this.logger.log("[findOne] Starting...");
     return this.catsRepository.findOneBy({ id });
   }
 
   async remove(id: number): Promise<void> {
+    this.logger.log("[remove] Starting...");
     await this.catsRepository.delete(id)
   }
 }

src/main.ts

@@ -2,8 +2,10 @@ import { NestFactory } from '@nestjs/core';
 import { AppModule } from './app.module';
 
 async function bootstrap() {
-  console.debug("[bootstrap] Starting...")
-  const app = await NestFactory.create(AppModule, { snapshot: true });
+  const app = await NestFactory.create(AppModule, {
+    snapshot: true,
+    logger: ['verbose']
+  });
   await app.listen(3000);
 }
 bootstrap();