Custom validator to check the presence of custom field name.

app/models/custom_field.rb

@@ -55,9 +55,10 @@ class CustomField < ActiveRecord::Base
 
   alias_method_chain :translations_attributes=, :globalized
 
-  validates_presence_of :name, :field_format
+  validates_presence_of :field_format
 
   validate :uniqueness_of_name_with_scope
+
   def uniqueness_of_name_with_scope
     taken_names = CustomField.where(:type => type)
     taken_names = taken_names.where('id != ?', id) if id
@@ -66,12 +67,13 @@ class CustomField < ActiveRecord::Base
     errors.add(:name, :taken) if name.in?(taken_names)
   end
 
-  validates_length_of :name, :maximum => 30
   validates_inclusion_of :field_format, :in => Redmine::CustomFieldFormat.available_formats
 
   validate :validate_presence_of_possible_values
   validate :validate_default_value_in_translations
 
+  validate :validate_presence_of_name
+
   def initialize(attributes = nil, options = {})
     super
     self.possible_values ||= []
@@ -106,6 +108,21 @@ class CustomField < ActiveRecord::Base
     self.is_required = required_field
   end
 
+  def validate_presence_of_name
+    if self.translations.empty?
+      errors.add(:name, :blank) if self.name.nil?
+    else
+      fallback_name = self.translations.find{|el| el.name != nil}
+      self.translations.each do | translation |
+        if translation.name.nil? && fallback_name.nil?
+          errors.add(:name, :blank)
+        else
+          translation.name = fallback_name.name if translation.name.nil?
+        end
+      end
+    end
+  end
+
   def possible_values_options(obj=nil)
     case field_format
     when 'user', 'version'