What causes Mapping not found for source SectionDocument and destination SectionDto?

[jbeckton]

I have triple checked my set up and I cannot figure this one out. I just upgraded all my packages to the latest versions.

@Module({
  imports: [
    AutomapperModule.forRoot({
      options: [{ name: 'default', pluginInitializer: classes, errorHandler: new MapperErrorHandler() }],
      singular: false
    })
  ],
  controllers: [],
  providers: []
})
export class AppModule {}

@Module({
  imports: [
    AutomapperModule,
  ],
  controllers: [SectionsController],
  providers: [SectionsService, SectionsRepository]
})
export class CatalogModule {}

export class SectionsService {
  constructor(private sectionsRepository: SectionsRepository, @InjectMapper('default') private sectionsMapper: Mapper) {}

  public async getPublishedSections(): Promise<SectionDto[]> {

    const results: SectionDocument[] = await this.sectionsRepository
      .mongoFindMany({ published: true, feature: PlatformFeatures.Listings.toString() })
      .catch((error) => Promise.reject(error));

    const sectionDtos: SectionDto[] = this.sectionsMapper.mapArray<SectionDocument, SectionDto>(results, SectionDto, SectionDocument);

    return Promise.resolve(sectionDtos);
  }
}

@Injectable()
export class SectionsProfile extends AutomapperProfile {
  constructor(@InjectMapper('default') mapper: Mapper) {
    super(mapper);
  }

  public mapProfile(): MappingProfile {
    return (mapper: Mapper) => {
      /* Section */
     
      mapper.createMap(SectionDocument, SectionDto).forMember(
        (d) => d.id,
        mapFrom((s) => s._id.toString())
      );
    };
  }
}

export class SectionDocument {
  _id?: ObjectId;
  __v?: number;
  @AutoMap()
  feature?: string;
  @AutoMap()
  slug?: string;
  @AutoMap()
  name?: string;
  @AutoMap()
  order?: number;
  @AutoMap()
  published?: boolean;
  @AutoMap()
  description?: string;
  @AutoMap()
  icon?: string;
}

export class SectionDto {
  id?: string;
  @AutoMap()
  feature?: string;
  @AutoMap()
  slug?: string;
  @AutoMap()
  name?: string;
  @AutoMap()
  order?: number;
  @AutoMap()
  published?: boolean;
  @AutoMap()
  description?: string;
  @AutoMap()
  icon?: string;

}

Error: AutoMapper Exception: Mapping not found for source SectionDocument and destination SectionDto

[micalevisk]

you need to register the SectionsProfile provider, as the docs shows here

providers: [SectionsProfile, SectionsService, SectionsRepository]