我创建了具有内它的服务的核心模块。
import { Module } from '@nestjs/common';
import { CacheService } from './cache.service';
@Module({
providers:[{ provide: CacheService, useValue: new CacheService()}],
exports:[{ provide: CacheService, useValue: new CacheService()}]
})
export class CoreModule {}
我已导入在CoreModule
的AppModule
。
@Module({
imports: [
TypeOrmModule.forRoot(typeOrmConfig),
CoreModule,
offerModule
],
controllers: [AppController],
providers: [AppService]
})
export class AppModule {}
有一个在AppModule
进口报价模块。当我试图注入在checkmodule的CacheService
,它抛出下面的错误。
2019-02-05 13:40:25 [error]: Error: Nest can't resolve dependencies of the OfferService (OfferRepository, ?, Connection, AppLogger). Please make sure that the argument at index [1] is available in the OfferModule context.
at Injector.lookupComponentInExports (C:\Project Workspace\ts-sharing\node_modules\@nestjs\core\injector\injector.js:144:19)
at <anonymous>
at process._tickDomainCallback (internal/process/next_tick.js:229:7)
at Function.Module.runMain (module.js:696:11)
at Object.<anonymous> (C:\Project Workspace\ts-sharing\node_modules\ts-node\src\bin.ts:157:12)
at Module._compile (module.js:653:30)
at Object.Module._extensions..js (module.js:664:10)
at Module.load (module.js:566:32)
at tryModuleLoad (module.js:506:12)
at Function.Module._load (module.js:498:3)
1: v8::internal::compiler::Type::Negative31
2: v8::internal::wasm::SignatureMap::Find
3: v8::internal::Builtins::CallableFor
4: v8::internal::Builtins::CallableFor
5: v8::internal::Builtins::CallableFor
6: 0000023CE08843C1
可有人请这个帮助。
你必须导入CoreModule
在OfferModule
一样,所以它适用于它的供应商。
如果你希望你的CoreModule
可以全局,你可以把它与global module装饰一@Global
。有了它,模块必须被(例如,在AppModule
)仅导入一次,然后将在所有模块中可用。
@Global()
@Module({
providers:[CacheService],
exports:[CacheService],
})
export class CoreModule {}