fixes #1479

app/controllers/tags_controller.rb

@@ -35,6 +35,6 @@ class TagsController < ApplicationController
 
 private
   def check_privilege(tag)
-    raise User::PrivilegeError unless (CurrentUser.is_builder? || tag.post_count <= 50)
+    raise User::PrivilegeError unless tag.editable_by?(CurrentUser.user)
   end
 end

app/models/tag.rb

@@ -561,6 +561,10 @@ class Tag < ActiveRecord::Base
     end
   end
 
+  def editable_by?(user)
+    user.is_builder? || (user.is_member? && post_count <= 50)
+  end
+
   include ApiMethods
   include CountMethods
   extend ViewCountMethods

app/views/tags/index.html.erb

@@ -18,7 +18,7 @@
               <%= link_to(tag.name, posts_path(:tags => tag.name)) %>
             </td>
             <td>
-              <% if CurrentUser.is_builder? || tag.post_count <= 50 %>
+              <% if tag.editable_by?(CurrentUser.user) %>
                 <%= link_to "edit", edit_tag_path(tag) %>
               <% end %>
               <% if CurrentUser.is_builder? && tag.post_count < 1_000 %>