英文:
AXIOS_INSTANCE_TOKEN at index [0] is available in the AppModule context
问题
我在NestJs项目中使用了Axios，但在Item-module中使用HttpService时出现了以下错误：
[Nest] 74973 - 07/20/2023, 3:28:01 PM ERROR [ExceptionHandler] Nest无法解析HttpService的依赖项（？）。请确保索引[0]处的AXIOS_INSTANCE_TOKEN参数在AppModule上下文中可用。
可能的解决方案：
- AppModule是否是有效的NestJS模块？
- 如果AXIOS_INSTANCE_TOKEN是提供者，它是否属于当前的AppModule？
- 如果AXIOS_INSTANCE_TOKEN从单独的@Module导出，那么该模块是否在AppModule中导入？
@Module({
imports: [/*包含AXIOS_INSTANCE_TOKEN的模块*/]
})
错误：Nest无法解析HttpService的依赖项（？）。请确保索引[0]处的AXIOS_INSTANCE_TOKEN参数在AppModule上下文中可用。
我分享了我的代码，请提出在这段代码中的问题。
文件路径：src/app.module.ts
@Module({
imports: [
ConfigModule.forRoot({
isGlobal: true,
load: [configuration]
}),
CamiModule,
ExamplesModule,
ItemModule,
HttpModule
],
controllers: [AppController],
providers: [
AppService,
HttpHandler,
HttpService,
{
provide: APP_INTERCEPTOR, useClass: PerformanceMonitor
}
],
})
export class AppModule {}
文件路径：src/item/item.module.ts
@Module({
imports: [HttpModule],
providers: [ItemService],
exports: [ItemService],
})
export class ItemModule { }
文件路径：src/item/item.service.ts
import { HttpService } from '@nestjs/axios';
import { Injectable } from '@nestjs/common';
import {
AxiosRequestConfig,
AxiosResponse,
} from 'axios';
import { firstValueFrom } from 'rxjs';
@Injectable()
export class ItemService {
constructor(private readonly httpService: HttpService) { }
// Get方法
async get<T>(url: string, config?: AxiosRequestConfig): Promise<AxiosResponse> {
try {
const response = await firstValueFrom(this.httpService.get<T>(url, config));
return response;
} catch(error) {
throw error
}
}
}
英文:
I am using Axios in nestJs project and but I am getting the following error while using HttpService in Item-module
[Nest] 74973 - 07/20/2023, 3:28:01 PM ERROR [ExceptionHandler] Nest can't resolve dependencies of the HttpService (?). Please make sure that the argument AXIOS_INSTANCE_TOKEN at index [0] is available in the AppModule context.
Potential solutions:
- Is AppModule a valid NestJS module?
- If AXIOS_INSTANCE_TOKEN is a provider, is it part of the current AppModule?
- If AXIOS_INSTANCE_TOKEN is exported from a separate @Module, is that module imported within AppModule?
@Module({
imports: [ /* the Module containing AXIOS_INSTANCE_TOKEN */ ]
})
Error: Nest can't resolve dependencies of the HttpService (?). Please make sure that the argument AXIOS_INSTANCE_TOKEN at index [0] is available in the AppModule context.
I am sharing my code kindly suggestion what is the issue in this code
File-Path: src/app.module.ts
@Module({
imports: [
ConfigModule.forRoot({
isGlobal: true,
load: [configuration]
}),
CamiModule,
ExamplesModule,
ItemModule,
HttpModule
],
controllers: [AppController],
providers: [
AppService,
HttpHandler,
HttpService,
{
provide: APP_INTERCEPTOR, useClass: PerformanceMonitor
}
],
})
export class AppModule {}
File-Path: src/item/item.module.ts
@Module({
imports: [HttpModule],
providers: [ItemService],
exports: [ItemService],
})
export class ItemModule { }
File-Path: src/item/item.service.ts
import { HttpService } from '@nestjs/axios';
import { Injectable } from '@nestjs/common';
import {
AxiosRequestConfig,
AxiosResponse,
} from 'axios';
import { firstValueFrom } from 'rxjs';
@Injectable()
export class ItemService {
constructor(private readonly httpService: HttpService) { }
// Get methood
async get<T>(url: string, config?: AxiosRequestConfig): Promise<AxiosResponse> {
try {
const response = await firstValueFrom(this.httpService.get<T>(url, config));
return response;
} catch(error) {
throw error
}
}
}
答案1
得分: 2
HttpService提供程序来自@nestjs/axios将由HttpModule注册。因此，您不必将其添加到您的providers数组中。只需删除它，应该可以正常工作。请按照文档操作：https://docs.nestjs.com/techniques/http-modulez
英文:
That HttpService provider from @nestjs/axios will be registered by HttpModule. So you must not add it to your providers array. Just remove that and it should work. Follow the docs: https://docs.nestjs.com/techniques/http-modulez
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