Here is how i have previously used grouping. Note i am using Solr 3.5:
SolrQuery query = new SolrQuery("");
query.setRows(GROUPING_LIMIT);
query.setParam("group", Boolean.TRUE);
query.setParam("group.field", "GROUP_FIELD");
This seems to work for me.
On Fri, Nov 30, 2012 at 1:17 PM, Roman Slavík <slaav...@gmail.com> wrote:
> Hi guys,
>
> I have problem with grouping in Solr 4.0 using Solrj api. I need this:
> search some documents limited with solr query, group them by one field and
> return total count of groups.
> There is param 'group.ngroups' for adding groups count into group
> response. Sounds easy, so I wrote something like this:
>
> SolrQuery query = new SolrQuery().setQuery(**queryString);
> query.addField("score");
>
> query.setParam(GroupParams.**GROUP, true);
> query.setParam(GroupParams.**GROUP_MAIN, true);
> query.setParam(GroupParams.**GROUP_FIELD, "group_field");
> query.setParam(GroupParams.**GROUP_LIMIT, "1");
> query.setParam(GroupParams.**GROUP_TOTAL_COUNT, true);
>
> QueryResponse response = solrServer.query(query);
> // contains found docs
> GroupResponse groupResponse = response.getGroupResponse(); // null
>
> Search result is ok, QueryResponse contains docs I searched for. But group
> response is always null. Did I miss something, some magic parameter for
> enabling group response?
>
> Thanks for any advice
>
> Roman
>
