#20

backend/app/controllers/tags_controller.rb

@@ -16,9 +16,12 @@ class TagsController < ApplicationController
     q = params[:q].to_s.strip
     return render json: [] if q.blank?
 
+    with_nico = !(params[:nico].to_s.strip.downcase.in?(['0', 'false', 'off', 'no']))
+
     tags = (Tag.joins(:tag_name).includes(:tag_name)
-            .where('(tags.category = ? AND tag_names.name LIKE ?) OR tag_names.name LIKE ?',
-                   'nico', "nico:#{ q }%", "#{ q }%")
+            .where(((with_nico ? '(tags.category = ? AND tag_names.name LIKE ?) OR ' : '') +
+                    'tag_names.name LIKE ?'),
+                   *(with_nico ? ['nico', "nico:#{ q }%"] : []), "#{ q }%")
             .order(Arel.sql('post_count DESC, tag_names.name ASC'))
             .limit(20))
     render json: tags.as_json(only: [:id, :category, :post_count], methods: [:name, :has_wiki])