Merge pull request #790 from MITLibraries/gdt-185-sort_by_score_then_…

…date

Introduces secondary sort by date

app/models/opensearch.rb

@@ -20,7 +20,8 @@ def build_query(from)
       from:,
       size: SIZE,
       query:,
-      aggregations:
+      aggregations:,
+      sort:
     }
 
     query_hash[:highlight] = highlight if @highlight
@@ -39,6 +40,20 @@ def query
     }
   end
 
+  def sort
+    [
+      { _score: { order: 'desc' } },
+      {
+        'dates.value.as_date': {
+          order: 'desc',
+          nested: {
+            path: 'dates'
+          }
+        }
+      }
+    ]
+  end
+
   def highlight
     {
       pre_tags: [