fix sorting issue

Author: ThomasKranitsas

app-constants.js

@@ -70,6 +70,11 @@ const challengeTracks = {
   QA: 'QA'
 }
 
+const challengeTextSortField = {
+  Name: 'name',
+  TypeId: 'typeId'
+}
+
 module.exports = {
   UserRoles,
   prizeSetTypes,
@@ -78,5 +83,6 @@ module.exports = {
   EVENT_ORIGINATOR,
   EVENT_MIME_TYPE,
   Topics,
-  challengeTracks
+  challengeTracks,
+  challengeTextSortField
 }

src/services/ChallengeService.js

@@ -251,7 +251,10 @@ async function searchChallenges (currentUser, criteria) {
   if (criteria.endDateEnd) {
     boolQuery.push({ range: { endDate: { lte: criteria.endDateEnd } } })
   }
-  const sortByProp = criteria.sortBy ? criteria.sortBy : 'created'
+
+  let sortByProp = criteria.sortBy ? criteria.sortBy : 'created'
+  // If property to sort is text, then use its sub-field 'keyword' for sorting
+  sortByProp = _.includes(constants.challengeTextSortField, sortByProp) ? sortByProp + '.keyword' : sortByProp
   const sortOrderProp = criteria.sortOrder ? criteria.sortOrder : 'desc'
 
   const mustQuery = []