Description
Solr gives an empty list of facet values when faceting over a DateRangeField. I would expect Solr to return each unique combination of each range's from and to date as a facet value.
Here is an example response. Each document has a date range field "validrange_dr" ("*_dr" is mapped to a single-value DateRangeField), but faceting over this attribute gives an empty list of facet values. Doing this for normal date fields works as expected.
{ "responseHeader":{ "status":0, "QTime":0, "params":{ "q":"*:*", "facet.field":"validrange_dr", "indent":"true", "fl":"validrange_dr", "q.op":"OR", "rows":"10", "facet":"true", "_":"1658503177774"}}, "response":{"numFound":38,"start":0,"numFoundExact":true,"docs":[ { "validrange_dr":"[2021-06-22T12:18:23.000Z TO 2999-12-31T23:59:59.999Z]"}, { "validrange_dr":"[2021-06-30T09:49:13.000Z TO 2999-12-31T23:59:59.999Z]"}, { "validrange_dr":"[2021-07-06T10:48:10.000Z TO 2999-12-31T23:59:59.999Z]"}, { "validrange_dr":"[2021-07-17T15:36:41.000Z TO 2999-12-31T23:59:59.999Z]"}, { "validrange_dr":"[2021-08-04T08:23:13.000Z TO 2999-12-31T23:59:59.999Z]"}, { "validrange_dr":"[2021-06-15T01:05:50.000Z TO 2999-12-31T23:59:59.999Z]"}, { "validrange_dr":"[2021-07-05T13:33:17.000Z TO 2999-12-31T23:59:59.999Z]"}, { "validrange_dr":"[2021-05-26T19:33:26.000Z TO 2999-12-31T23:59:59.999Z]"}, { "validrange_dr":"[2021-06-12T21:29:45.000Z TO 2999-12-31T23:59:59.999Z]"}, { "validrange_dr":"[2021-07-20T20:11:28.000Z TO 2999-12-31T23:59:59.999Z]"}] }, "facet_counts":{ "facet_queries":{}, "facet_fields":{ "validrange_dr":[]}, "facet_ranges":{}, "facet_intervals":{}, "facet_heatmaps":{}}}