我正在使用 nestjsx-automapper (https:/automapper.netlify.appdocsusagesinitadd-profile。)(感谢那段很酷的代码)。我已经按照文档中的描述和这里的讨论实现了它。如何使用nartcautomapper的配置文件到一个nestjs应用程序中。
但我还是有一个 从我的资料中访问AutoMapper的问题。 类。
我的设置是这样的。
app.module.ts:
import { Module } from '@nestjs/common';
import { AppService } from './app.service';
import { MerchantModule } from './merchant/merchant.module';
import { TypeOrmModule } from '@nestjs/typeorm';
import { AutomapperModule, AutoMapper } from 'nestjsx-automapper';
@Module({
imports: [
TypeOrmModule.forRoot({
...
}),
AutomapperModule.withMapper(),
MerchantModule
],
providers: [],
controllers: [],
})
export class AppModule {}
merchant.module.ts:
import { Module } from '@nestjs/common';
import { MerchantController } from './merchant.controller';
import { MerchantService } from './merchant.service';
import { TypeOrmModule } from '@nestjs/typeorm';
import { Merchant } from './entities/merchant.entity';
import { MerchantProfile } from './profiles/merchant.profile';
import { AutoMapper, AutomapperModule } from 'nestjsx-automapper';
@Module({
imports: [TypeOrmModule.forFeature([Merchant]), AutomapperModule, MerchantProfile],
exports: [TypeOrmModule],
controllers: [MerchantController],
providers: [MerchantService]
})
export class MerchantModule {}
merchant.profile.ts:
import {
ProfileBase,
Profile,
AutoMapper
} from 'nestjsx-automapper';
import { Merchant } from '../entities/merchant.entity';
import { MerchantDto } from '../dto/merchant.dto';
@Profile()
export class MerchantProfile extends ProfileBase {
constructor(
private readonly mapper: AutoMapper) {
super();
mapper.createMap(Merchant, MerchantDto);
}
configure(): void {
return null;
}
}
merchant.controller.ts。
import { Controller, Get, Param, Post, Body, Put, Delete } from '@nestjs/common';
import { MerchantService } from './merchant.service';
import { Merchant } from './entities/merchant.entity';
import { MerchantDto } from './dto/merchant.dto';
import { DeleteResult } from 'typeorm';
import { AutoMapper, InjectMapper } from 'nestjsx-automapper';
@Controller('merchant')
export class MerchantController {
constructor(
private merchantService: MerchantService,
@InjectMapper() private readonly mapper: AutoMapper) { }
@Get()
public async findAll(): Promise<MerchantDto[]> {
return this.mapper.mapArray(await this.merchantService.find(),MerchantDto);
}
}
当我用这个设置运行应用程序时,我得到以下异常。Nest无法解析AutomapperModule的依赖关系(? 请确保索引[0]处的参数 AutomapperExplorer 在 AutomapperModule 上下文中可用。
AutoMapperModule.withMapper()
在 AppModule
是你唯一需要使用的时候。AutoMapperModule
.
withMapper()
创建一个 AutoMapper
将通过 @InjectMapper()
当您想使用 Mapper
在...中 Service
(或任何 Injectable
).
至于 Profile
,以下是正确的语法。
@Profile()
export class MerchantProfile extends ProfileBase {
constructor(mapper: AutoMapper) { // no private readonly.
super();
mapper.createMap(Merchant, MerchantDto);
}
// no configure() method
}
以下是正确的语法: @nartc/automapper
源码 addProfile()
是这样写的。
addProfile(profile: new (mapper: AutoMapper) => MappingProfile): AutoMapper {
this._profileStorage.add(this, new profile(this));
return this;
}
你可以看到内部。@nartc/automapper
将实例化(new profile()
)并传入 AutoMapper
实例到Profile的构造函数中,这样您就可以在Profile的 Profile's constructor
对于这段代码,你的 MerchantModule
import { Module } from '@nestjs/common';
import { MerchantController } from './merchant.controller';
import { MerchantService } from './merchant.service';
import { TypeOrmModule } from '@nestjs/typeorm';
import { Merchant } from './entities/merchant.entity';
// import { MerchantProfile } from './profiles/merchant.profile';
// this is all you need which is to import the profile so TypeScript can execute it. Don't need `MerchantProfile` at all
import './profiles/merchant.profile';
import { AutoMapper, AutomapperModule } from 'nestjsx-automapper';
@Module({
imports: [TypeOrmModule.forFeature([Merchant])], // don't need to import AutoMapperModule again. MerchantProfile is not a Module so you can't import it
exports: [TypeOrmModule],
controllers: [MerchantController],
providers: [MerchantService]
})
export class MerchantModule {}
在你的 MerchantController
:
@Controller('merchant')
export class MerchantController {
constructor(
private merchantService: MerchantService,
@InjectMapper() private readonly mapper: AutoMapper) { }
@Get()
public async findAll(): Promise<MerchantDto[]> {
// make sure `this.merchantService.find()` returns an Array of
// Merchant instances. If not, please provide an extra param to map()
// return this.mapper.mapArray(await this.merchantService.find(),MerchantDto);
return this.mapper.mapArray(await this.merchantService.find(), MerchantDto, Merchant); // notice the 3rd parameter is the Source model.
}
}
请告诉我这对你是否有效。如果不行,请在 nestjsx-automapper
repo,并提供一个可复制的仓库,我会尽快看一下。
我不太熟悉 AutoMappModule
工作,但它看起来像在你的 MerchantModule
您导入 AutoMapperModule
而你 应 传入 AutoMapperModule.withMapper()
,类似于你在 AppModule
.