X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/9db635a992ec6464c40ac69eadeac78dff60ccf9..81857a744613f3a9f3aa4fb1848e9a9768e174c7:/app/models/user.rb

diff --git a/app/models/user.rb b/app/models/user.rb
index 8ed6d4465..7faf748cd 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -99,6 +99,7 @@ class User < ApplicationRecord
   validates :display_name, :if => proc { |u| u.display_name_changed? },
                            :characters => { :url_safe => true },
                            :whitespace => { :leading => false, :trailing => false }
+  validate :display_name_cannot_be_user_id_with_other_id, :if => proc { |u| u.display_name_changed? }
   validates :email, :presence => true, :confirmation => true, :characters => true
   validates :email, :if => proc { |u| u.email_changed? },
                     :uniqueness => { :case_sensitive => false }
@@ -123,6 +124,12 @@ class User < ApplicationRecord
   before_save :update_tile
   after_save :spam_check
 
+  def display_name_cannot_be_user_id_with_other_id
+    display_name&.match(/^user_(\d+)$/i) do |m|
+      errors.add :display_name, I18n.t("activerecord.errors.messages.display_name_is_user_n") unless m[1].to_i == id
+    end
+  end
+
   def to_param
     display_name
   end