FIX: when deleting a tag, the warning modal has the wrong topic count

app/assets/javascripts/discourse/controllers/tags-show.js.es6

@@ -119,8 +119,8 @@ export default Ember.Controller.extend(BulkTopicSelection, {
 
     deleteTag() {
       const self = this;
-      const topicsLength = this.get('list.topic_list.topics.length');
-      const confirmText = topicsLength === 0 ? I18n.t("tagging.delete_confirm_no_topics") : I18n.t("tagging.delete_confirm", {count: topicsLength});
+      const numTopics = this.get('list.topic_list.tags.firstObject.topic_count') || 0;
+      const confirmText = numTopics === 0 ? I18n.t("tagging.delete_confirm_no_topics") : I18n.t("tagging.delete_confirm", {count: numTopics});
       bootbox.confirm(confirmText, function(result) {
         if (!result) { return; }
 

app/models/topic_list.rb

@@ -35,7 +35,8 @@ class TopicList
                 :for_period,
                 :per_page,
                 :top_tags,
-                :current_user
+                :current_user,
+                :tags
 
   def initialize(filter, current_user, topics, opts = nil)
     @filter = filter
@@ -46,6 +47,10 @@ class TopicList
     if @opts[:category]
       @category = Category.find_by(id: @opts[:category_id])
     end
+
+    if @opts[:tags]
+      @tags = Tag.where(id: @opts[:tags]).all
+    end
   end
 
   def top_tags

app/serializers/tag_serializer.rb

@@ -1,3 +1,3 @@
 class TagSerializer < ApplicationSerializer
-  attributes :id, :name
+  attributes :id, :name, :topic_count
 end

app/serializers/topic_list_serializer.rb

@@ -7,9 +7,11 @@ class TopicListSerializer < ApplicationSerializer
              :draft_sequence,
              :for_period,
              :per_page,
-             :top_tags
+             :top_tags,
+             :tags
 
   has_many :topics, serializer: TopicListItemSerializer, embed: :objects
+  has_many :tags, serializer: TagSerializer, embed: :objects
 
   def can_create_topic
     scope.can_create?(Topic)
@@ -26,4 +28,8 @@ class TopicListSerializer < ApplicationSerializer
   def include_top_tags?
     Tag.include_tags?
   end
+
+  def include_tags?
+    SiteSetting.tagging_enabled && object.tags.present?
+  end
 end