Add length validations for string fields (#24283).

Patch by Felix Schäfer.

git-svn-id: http://svn.redmine.org/redmine/trunk@15989 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/custom_field.rb

@@ -32,6 +32,7 @@ class CustomField < ActiveRecord::Base
   validates_presence_of :name, :field_format
   validates_uniqueness_of :name, :scope => :type
   validates_length_of :name, :maximum => 30
+  validates_length_of :regexp, maximum: 30
   validates_inclusion_of :field_format, :in => Proc.new { Redmine::FieldFormat.available_formats }
   validate :validate_custom_field
   attr_protected :id