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[英]How to use only dependency injection container from Nest.js framework?
[英]Dependency injection of nest in babel particularly with mongoose
我正在遵循有關Mongoose的NestJs指南,但是使用Babel時,我在嘗試注入我的架構時遇到錯誤。 代碼非常簡單,與打字稿示例相同,但帶有babel。
這是我的主要模塊
import { Module } from '@nestjs/common';
import { MongooseModule } from '@nestjs/mongoose';
import { EventModule } from './events/event-module';
@Module({
imports: [
MongooseModule.forRoot(process.env.MONGO_URI),
EventModule,
],
})
export class AppModule {}
這是最簡單的架構示例
import { Schema } from 'mongoose';
export const EventSchema = new Schema({
title: String,
description: Number,
});
模塊事件模塊:
import { Module } from '@nestjs/common';
import { MongooseModule } from '@nestjs/mongoose';
import { EventController } from "./event-controller";
import { EventService } from "./event-service";
import { EventSchema } from '../schemas/event-schema';
@Module({
imports: [
MongooseModule.forFeature([
{ name: 'Event', schema: EventSchema }
])
],
controllers: [EventController],
providers: [
EventService,
],
})
export class EventModule {}
最后,我要使用架構的服務:
import { Injectable } from '@nestjs/common';
import { InjectModel } from '@nestjs/mongoose';
import { EventSchema } from '../schemas/event-schema';
@Injectable()
export class EventService {
@InjectModel(EventSchema) eventModel;
async getAll() {
return await this.eventModel.find().exec();
}
}
問題是,當我從控制器調用getAll
時,事實證明eventModel
是未定義的! 實例化時不會引發任何錯誤。 引發的錯誤是:
TypeError: Cannot read property 'find' of undefined
at EventService._callee$ (D:\.../event-service.js:9:34)
at tryCatch (D:\...\node_modules\babel-polyfill\node_modules\regenerator-runtime\runtime.js:65:40)
難道在babel中,依賴注入對nestjs
嗎? InjectModel
應該如何工作或如何與babel一起使用?
預先非常感謝您,任何建議或提示都將不勝感激並得到好評
問候
有一個錯誤:
import { Injectable } from '@nestjs/common';
import { InjectModel } from '@nestjs/mongoose';
import { EventSchema } from '../schemas/event-schema';
@Injectable()
export class EventService {
@InjectModel(EventSchema) eventModel;
async getAll() {
return await this.eventModel.find().exec();
}
}
這條線
@InjectModel(EventSchema) eventModel;
應該是@InjectModel('Event') eventModel
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