Kotlin : Mono<MutableList<Object>> don't return as dto when i put to ResultDto - mongodb

Question

I need modify .block() repository database operations to without .block() -» just put request to stream not to memory.
When the results return simple entity or just something list is ok!
But when I return combined dto I get this:
{
"resultsLength": 1,
"results": {
"scanAvailable": true
}
}
Mapped dto to response
data class CustomObjectResultDto(
val resultsLength: Long?,
#JsonInclude
val results: Mono<MutableList<CustomObjectDto>>
)
JsonFormat:
Want:
{
"resultsLength": 1,
"results": {
"id": "61953fb7e85fe0605c00bdd1",
"cardRequestDate": "2029-02-05T23:00:00Z",
"userName": "XYZ",
"applicationType": {
"name": "plastic",
"label": "plastic_label"
},
"status": {
"name": "accepted",
"label": "accepted_label"
},
"statusChangeDate": "2019-02-10T23:00:00Z",
"virtualCardNumber": 157426399
}
}
Get:
{
"resultsLength": 1,
"results": {
"scanAvailable": true
}
}
Repository:
override fun listing(ctx: context, filterParams: FilterParams, filterConfig: FilterConfig):
Mono<MutableList<CustomObject>> {
val sort = Sort.by(Sort.Direction.fromString(filterConfig.order), filterConfig.orderBy)
val pageRequest = PageRequest.of(filterConfig.pageIndex, filterConfig.pageLimit, sort)
val userInfoWithoutUser = context(
partnerId = ctx.partnerId,
correlationId = ctx.correlationId
)
val query =
createQuery(userInfoWithoutUser, filterParams).collation(Collation.of(DEFAULT_COLLATION)).with(pageRequest)
return reactiveMongoTemplate.find(query, CustomObject::class.java).collectList()
}
Service:
override fun listing(
ctx: context,
filterConfig: FilterConfig,
filterParams: FilterParams
): CustomObjectResultDto {
val result = repository.listing(ctx, filterParams, filterConfig)
.flatMapIterable { list: List<CostumObject> ->
list.map { it.toItemDto() }
}.collectList()
val count = repository.count(ctx, filterParams)
return CustomObjectResultDto(count,result)
}
Controller:
...
): MutableHttpResponse<CustomObjectResultDto> {
val ctx = context(partnerId, userId, correlationId)
...log...
val filterParams = FilterParams(userName, applicationType, status, wifiStatus, cardNumber)
val filterConfig = FilterConfig(pageLimit, pageIndex, PAGE_ORDER_BY_VALUES.getValue(orderBy), order)
return HttpResponse.ok(service.listing(ctx, filterConfig, filterParams))
}

Answer 1

I solved
override fun listing(
ctx: context,
filterConfig: FilterConfig,
filterParams: FilterParams
): Mono<CustomObjectResultDto> {
val count = repository.count(ctx, filterParams)
return repository.listing(ctx, filterParams, filterConfig)
.flatMapIterable { list: List<CustomObject> ->
list.map { it.toItemDto() }
}.collectList()
.map { listOfDocuments ->
CustomObjectResultDto(count, listOfDocuments)
}
}