something like `fetchAlbums().flatMap { album -&g...

# android

[leolima]

something like

fetchAlbums().flatMap { album -> fetchPhotos(album.id).map { photos -> album to photos } }

would give you a pair of album / photos

[Soundlicious]

it's a pair, not a list of pair 😕 I can't find how to get a list from there... apparently i can't use flatmap(listOf(it)) on the result of my map nor on the first flatmap. I'll continue that after dinner

[leolima]

oh, i see. maybe:

fetchAlbums()
      .flatMapObservable { fromIterable(it) }
      .flatMap { album -> 
        fetchPhotos(album.id)
            .toObservable()
            .map { photos -> album to photos} 
      }
      .toList()

[Soundlicious]

i don't have flatMapObservable.
I already did something like that in java, didn't took me that long to figure out how to do it >.< I missing something here but don't know what ...

[Soundlicious]

ah i found my old project, i wasn't keeping the reference from the first request, i was just using it to get all the final request.

[Soundlicious]

fixed it : userService.fetchUserAlbums(state.id)
.flatMap { album -> userService.fetchUserPhotos(album.id)
.map { photo -> listOf(photo) }
.map { listOf(PhotoAlbumModel(album, photos = it)) }
}.execute {
copy(id = state.id, request = it)
}

[Soundlicious]

@leolima Thanks a lot for putting me on the good track 👍