backend/app/controllers/tags_controller.rb

@@ -17,6 +17,7 @@ class TagsController < ApplicationController
     return render json: [] if q.blank?
 
     with_nico = !(params[:nico].to_s.strip.downcase.in?(['0', 'false', 'off', 'no']))
+    with_empty = params[:empty].to_s.strip.downcase.in?(['1', 'true', 'on', 'yes'])
 
     alias_rows =
         TagName
@@ -33,6 +34,7 @@ class TagsController < ApplicationController
     end
 
     base = Tag.joins(:tag_name).includes(:tag_name)
+    base = base.where('tags.post_count > 0') unless with_empty
 
     canonical_hit =
         base