How to map array of number to an array of object

[fgagneten]

Is there an existing issue for this?

• I have searched the existing issues

Describe the issue

I want to map a DTO (RequestDto) which has an array of numbers (selectedFacilities) to an array of custom objects (CenterFacilities) that has two ids: a centerId. that is the id of the center (this is something that I receive from the token and) and the facilityId that is an id in the selectedFacilities list

So this is the DTO I receive from the client:

export class RequestDto {
  description!: string
  selectedFacilities?: number[]
}

I need to convert a RequestDto to Center

This is how a Center looks like:

export interface CenterAttributes {
    description: string
    facilities: CenterFacility[]
}


export class Center extends BaseModel<CenterAttributes> {
    description!: string
    facilities!: Array<Facility & { CenterFacility: CenterFacility }>
}

interface CenterFacilityAttributes {
    centerId: number
    facilityId: number
}

export class CenterFacility extends BaseModel<CenterFacilityAttributes> {
    centerId!: number
    facilityId!: number
}

So I tried several ways with mapWith and mapArray but wasn't able to find too much information about that.

Is there any possibility to map a list of numbers to a list of CenterFacility?

each selectedFacilities is a facilityId in the CenterFacility. The other id, the centerId, will be a fixed number that I should pass as a prop (maybe with mapWithArguments)?

This is what I tried:

mapper.createMap(SaveCenterRequestDto, Center)
    .forMember((destination) => destination.description, mapFrom((source => source.description)))
    //.forMember((destination) => destination.facilities, mapWith(() => CenterFacility, (s) => s.facilities, (t)=> t.selectedFacilities))
    //.forMember((destination) => destination.facilities, mapWith((one) => one.facilityId, (two) => two.facilityId, (three) => three.centerId))
    //.forMember((destination) => destination.facilities, mapWithArguments((source => source.selectedFacilities), {centerId}))
    //.forMember((destination) => destination.facilities, mapWithArguments((source => source.selectedFacilities), {centerId}))
    //.forMember((destination) => destination.facilities, mapWithArguments((source, {argument1}) => FacilityDto, CenterFacility, (source) => source.selectedFacilities)))

all those comment lines were possibilities I tried without luck.

Mapping configuration

const mapper = createMapper({
  name: 'NewMapper',
  pluginInitializer: sequelize(),
})

Note

I need to do a manual mapping.

Package

• I don't know.
• @automapper/core
• @automapper/classes
• @automapper/nestjs
• @automapper/pojos
• @automapper/sequelize
• @automapper/types
• Other (see below)

AutoMapper version

6.2.1