Hello experts. The graphql-kotlin project looks great to me, but one tiny point in the ktor example was unclear. In the dataloaders, the entities are searched for based on a set of ids

Book.search(ids.flatten())

, and the resulting list is then filtered for only those that match that same set of ids

allBooks.filter { idSet.contains(it.id) }

. Is that filter not superfluous? Thanks, Eamonn https://github.com/ExpediaGroup/graphql-kotlin/blob/master/examples/server/ktor-se[…]aphql/examples/server/ktor/schema/dataloaders/BookDataLoader.kt

You are correct that all the ids have been filtered, but the DataLoader is actually a

List<Int>

for the ids mapped to a

List<Book>

so that is why we have the double filter there to group the ids by all books so we only have to call

books.search

once I suppose what we could actually do is map every id to call the

Books.search

function instead, but this is just a basic example