Repository Identifier should be frozen (#11109).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@10081 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/repository.rb

@@ -20,6 +20,9 @@ class ScmFetchError < Exception; end
 class Repository < ActiveRecord::Base
   include Redmine::Ciphering
   include Redmine::SafeAttributes
+  
+  # Maximum length for repository identifiers
+  IDENTIFIER_MAX_LENGTH = 255
 
   belongs_to :project
   has_many :changesets, :order => "#{Changeset.table_name}.committed_on DESC, #{Changeset.table_name}.id DESC"
@@ -34,7 +37,7 @@ class Repository < ActiveRecord::Base
   before_destroy :clear_changesets
 
   validates_length_of :password, :maximum => 255, :allow_nil => true
-  validates_length_of :identifier, :maximum => 255, :allow_blank => true
+  validates_length_of :identifier, :maximum => IDENTIFIER_MAX_LENGTH, :allow_blank => true
   validates_presence_of :identifier, :unless => Proc.new { |r| r.is_default? || r.set_as_default? }
   validates_uniqueness_of :identifier, :scope => :project_id, :allow_blank => true
   validates_exclusion_of :identifier, :in => %w(show entry raw changes annotate diff show stats graph)
@@ -114,6 +117,14 @@ class Repository < ActiveRecord::Base
     end
   end
 
+  def identifier=(identifier)
+    super unless identifier_frozen?
+  end
+
+  def identifier_frozen?
+    errors[:identifier].blank? && !(new_record? || identifier.blank?)
+  end
+
   def identifier_param
     if is_default?
       nil