Collapse/Expand on non indexed field

[Eirik Hungnes]

Hi,

We are seeing that the ExpandComponent does not expand results when the
field is not indexed. If indexed=true the results will be expanded as
expected.

1. Is that the case?
2. Why?

Here is the field used for collapse/expand:
<field name="expandme" type="string" indexed="false" stored="false"
multiValued="false" docValues="true" />

Thanks,
Eirik