根据文档，我在控制器的构造函数中注入了一个服务，但结果是undefined.
processScraped.controller.ts
import { Controller, Post, Body } from '@nestjs/common';
import { ProcessScrapedService } from "./processScraped.service"
console.log(`\nController - ProcessScrapedService = `, ProcessScrapedService) // logs : class ProcessScrapedService { ......
@Controller('processScraped')
export class ProcessScrapedController {
constructor(private readonly pss: ProcessScrapedService) {
console.log(`constructor - pss = `, pss) // logs : undefined (Should not !)
console.log(`constructor - this.pss = `, this.pss) // logs : undefined (Should not !)
}
@Post()
async processScraped(@Body() body) {
console.log(`processScraped - this.pss = `,this.pss) // logs : undefined (Should not !)
return this.pss.processScraped(body) // TypeError: Cannot read property 'processScraped' of undefined
}
}
所以 ：
服务存在
导入后作为服务正确导入并记录
当我将它注入我的控制器时，它是未定义的。
也许问题出在服务定义中？
processScraped.service.ts
import { Component } from '@nestjs/common';
@Component()
export class ProcessScrapedService {
async processScraped(body) {
// Some logic here
return
}
}
...或者也许在模块中？
processScraped.module.ts
import { Module } from '@nestjs/common';
import { ProcessScrapedController } from './processScraped.controller';
import { ProcessScrapedService } from './processScraped.service';
console.log(`\Module - nProcessScrapedService = `, ProcessScrapedService) // logs : class ProcessScrapedService { ......
@Module({
controllers: [ProcessScrapedController],
components: [ProcessScrapedService],
})
export class ProcessScrapedModule { }
我真的看不出我在这里做错了什么？
编辑- 这是我的依赖项：
"dependencies": {
"@nestjs/common": "^4.5.9",
"@nestjs/core": "^4.5.10",
"@nestjs/microservices": "^4.5.8",
"@nestjs/mongoose": "^3.0.1",
"@nestjs/testing": "^4.5.5",
"@nestjs/websockets": "^4.5.8",
"@types/mongoose": "^5.0.9",
"bluebird": "^3.5.1",
"dotenv": "^5.0.1",
"elasticsearch": "^14.2.2",
"express": "^4.16.3",
"mongoose": "^5.0.16",
"mongoose-elasticsearch-xp": "^5.4.1",
"reflect-metadata": "^0.1.12",
"rxjs": "^5.5.6",
"shortid": "^2.2.8"
},
"devDependencies": {
"@types/node": "^8.0.0"
}
和我的 tsconfig.json ：
{
"compilerOptions": {
"target": "ES2017",
"module": "commonjs",
"lib": [
"dom",
"es2017"
],
"outDir": "../../dist/server",
"removeComments": true,
"strict": true,
"noImplicitAny": false,
"typeRoots": [
"node_modules/@types"
],
"types": [
"node"
],
"experimentalDecorators": true
}
}