Values: refer, extend do not work for selectDiscoveries, but a value of "count" works.
All these values work well for very similar method host.get
In a revision 16195 (merge of
ZBXNEXT-588) the parameter selectDiscoveries to sub-select in a method host.get has been changed to use a method discoveryrule.get (which works well) instead of item.get (doesn't work as described above)
Unfortunately the same was not done for the method template.get
Apply attached patch, which use discoveryrule.get as was done for host.get. Patch tested for refer, extend, count values for selectDiscoveries