FIX: Missing count method for search results

app/controllers/knowledge_explorer/knowledge_explorer_controller.rb

@@ -98,15 +98,19 @@ module KnowledgeExplorer
     def knowledge_explorer_categories
       selected_categories = SiteSetting.knowledge_explorer_categories.split("|")
 
-      categories = Category.where('id IN (?)', selected_categories)
+      if selected_categories
+        categories = Category.where('id IN (?)', selected_categories)
 
-      categories.select { |c| @guardian.can_see_category?(c) }
+        return categories.select { |c| @guardian.can_see_category?(c) }
+      end
     end
 
     def knowledge_explorer_tags
       selected_tags = SiteSetting.knowledge_explorer_tags.split("|")
 
-      Tag.where('name IN (?)', selected_tags)
+      if selected_tags
+        return Tag.where('name IN (?)', selected_tags)
+      end
     end
 
     def category_by_filter(category_filter)

assets/javascripts/discourse/controllers/knowledge-explorer.js.es6

@@ -36,6 +36,11 @@ export default Ember.Controller.extend({
     return results.length === 0;
   },
 
+  @computed("searchResults")
+  searchCount(results) {
+    return results.length;
+  },
+
   @observes("filterTags")
   filterByTags() {
     const filterTags = this.get("filterTags");
@@ -49,7 +54,6 @@ export default Ember.Controller.extend({
           arrayContainsArray(topic.tags, filter)
         );
 
-        debugger;
         const filteredTags = [];
 
         // add active tags

assets/javascripts/discourse/templates/knowledge-explorer.hbs

@@ -22,9 +22,9 @@
       {{/if}}
     {{else if hasSearchResults}}
       {{#if emptySearchResults}}
-        {<div class="no-result">{i18n 'search.no_results'}}</div>
+        <div class="no-result">{{i18n 'search.no_results'}}</div>
       {{else}}
-        <div>{{i18n "knowledge_explorer.search.results" count=count}}</div>
+        <div>{{i18n 'knowledge_explorer.search.results' count=searchCount}}</div>
         {{knowledge-explorer-topic-list topics=searchResults}}
       {{/if}}
     {{else}}