Hi Mikhail,
The JSON Loader does distinguish a singleton from an array in
JsonLoader#buildDoc() and JsonLoader#mapEntryIsChildDoc(). I've opened an
issue in JIRA with a syntax proposal for XML:
https://issues.apache.org/jira/browse/SOLR-16183
It looks like it would be a small adjustment, but I only read Java and
don't really speak it.
Thomas
Op zo 1 mei 2022 om 22:44 schreef Mikhail Khludnev <m...@apache.org>:
> 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
>
