[Search Source] Specify strict_date_optional_time_nanos as a formatte…

…r for date_nanos field

src/plugins/data/common/index_patterns/index_patterns/index_pattern.ts

@@ -179,7 +179,7 @@ export class IndexPattern implements IIndexPattern {
           field: dateField.name,
           format:
             dateField.esTypes && dateField.esTypes.indexOf('date_nanos') !== -1
-              ? 'strict_date_time'
+              ? 'strict_date_optional_time_nanos'
               : 'date_time',
         };
       }

src/plugins/data/common/search/search_source/search_source.ts

@@ -614,6 +614,7 @@ export class SearchSource {
         // if items that are in the docvalueFields are provided, we should
         // inject the format from the computed fields if one isn't given
         const docvaluesIndex = keyBy(filteredDocvalueFields, 'field');
+        const formatterIndex = keyBy(filteredDocvalueFields, 'format');
         body.fields = body.fields.map((fld: SearchFieldValue) => {
           const fieldName = getFieldName(fld);
           if (Object.keys(docvaluesIndex).includes(fieldName)) {
@@ -626,6 +627,10 @@ export class SearchSource {
                   ...fld,
                 };
           }
+          if (Object.keys(formatterIndex).includes('strict_date_optional_time_nanos')) {
+            // @ts-ignore
+            fld.format = 'strict_date_optional_time_nanos';
+          }
           return fld;
         });
       }