```ruby
class DisableFileTypes < ActiveRecord::Migration
  def self.up
    Radiant::Config['assets.skip_filetype_validation'] = true
    puts "-- Setting default content types in Radiant::Config"
    if defined? SettingsExtension && Radiant::Config.column_names.include?('description')
      Config.find(:all).each do |c|
       description = case c.key
         when 'assets.skip_filetype_validations'
           'When set to true, disables the filetype validations. Set to false to enable them.'
         else
           c.description
       end
       c.update_attribute :description, description
      end
    end
  end

  def self.down
  end
end
```

Fix migration by prefixing the Config module with Radiant
user
```ruby
class DisableFileTypes < ActiveRecord::Migration
  def self.up
    Radiant::Config['assets.skip_filetype_validation'] = true
    puts "-- Setting default content types in Radiant::Config"
    if defined? SettingsExtension && Radiant::Config.column_names.include?('description')
      Radiant::Config.find(:all).each do |c|
       description = case c.key
         when 'assets.skip_filetype_validations'
           'When set to true, disables the filetype validations. Set to false to enable them.'
         else
           c.description
       end
       c.update_attribute :description, description
      end
    end
  end

  def self.down
  end
end
```
assistant