Array of multiple types in response not working

Version : “@nestjs/swagger”: “^2.5.1”

I’m trying to print out an API response with a list of various object types. I’m also trying to use class-transformer with discriminators but swagger prints out [{}]

export class GetPageDto extends WeakCreatePageDto {
  @ApiModelPropertyOptional({
    isArray: true,
  })
  @IsOptional()
  @IsArray()
  @Type(() => BaseBlockDto, {
    discriminator: {
        property: 'type',
        subTypes: [
            { value: GetBannerDto, name: 'banner' },
            { value: GetCampaignDto, name: 'campaign' },
        ],
    },
  })
  readonly blockList: GetBannerDto | GetCampaignDto;
}

Is there a way to define an array of multiple types ?

[arekbal]

Same observation today. @ApiModelProperty({ isArray: true, type: [FooDto] }) readonly items: FooDto[] leads to type being empty in .json.

EDIT: Got this working… Apparently out of 5 known (to me) possibilities:

1. @ApiModelProperty({ type: [FooDto] }) readonly items: FooDto[]
2. @ApiModelProperty({ isArray: true, type: FooDto }) readonly items: FooDto[]
3. @ApiModelProperty({ isArray: true }) readonly items: FooDto[]
4. @ApiModelProperty({ isArray: true, type: [FooDto] }) readonly items: FooDto[]
5. @ApiModelProperty() readonly items: FooDto[] only first 2 work.

It is closest to what is described in the ‘quickstart’ as well. So I would not dare to say ‘docs’ are wrong… but still… it could be a little confusing. 😉

[lock[bot]]

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