在SOLR 7.2.1上进行多值字段排序

Question

i use a server with solr 7.3.0 for testing. my scheme has some multivalued string fields like

<field name="rating" type="string" omitNorms="true" multiValued="true" indexed="true" stored="true"/>

On solr 7.3.0 a url query for sorting for the field "rating" works fine. Something like this:

server-name1:8983/sorl/core/search?q=*&sort=rating DESC

But recently i use a slave and the above mentioned solr 7.3.0 server is the master server. The slave has a lesser version (7.2.1) installed. Because the server exists longer and this was was the latest version back then. I never bothered to update this yet. But now the same query as above

server-name2:8983/sorl/core/search?q=*&sort=rating DESC

returns a error message:

"msg":"can not sort on multivalued field:rating"

My question is: is this just a recently implemented feature or did i miss something? I could update to 7.3.0 for the slave as well, but it just want to be sure if this is just a version issue.

Answer 1

Yes, this was implemented for 7.3.0. See SOLR-11854 - multiValued PrimitiveFieldType should implicitly sort on min/max based on the asc/desc keyword .

To find out if something has changed between versions, refer to the changelog for the new version . This is listed under the "New features" section:

SOLR-11854: multivalued primitive fields can now be sorted by implicitly choosing the min/max value for asc/desc sort orders. (hossman)