Hello, Thomas.
I think we never think about singleton as a special case, never distinguish
it from array.
On Sun, May 1, 2022 at 5:03 PM Thomas Corthals <tho...@klascement.net>
wrote:
> When I put only one child document in a field with the same name, it's
> indexed as a "multivalued" child document.
>
> <doc>
> <field name="id">1</field>
> <field name="single_child">
> <doc>
> <field name="id">2</field>
> </doc>
> </field>
> <field name="children">
> <doc>
> <field name="id">3</field>
> </doc>
> <doc>
> <field name="id">4</field>
> </doc>
> </field>
> </doc>
>
> {
> "responseHeader":{
> "status":0,
> "QTime":2,
> "params":{
> "q":"id:1",
> "fl":"id,single_child,children,[child]"}},
> "response":{"numFound":1,"start":0,"numFoundExact":true,"docs":[
> {
> "id":"1",
> "single_child":[
> {
> "id":"2"}],
> "children":[
> {
> "id":"3"},
>
> {
> "id":"4"}]}]
> }}
>
>
if the problem is an array
"single_child":*[*
{
"id":"2"}*]*,
I believe it's inserted in ChildDocTransformer#addChildrenToParent(), and
perhaps can be hacked in custom transformer.
--
Sincerely yours
Mikhail Khludnev
