Method: MongoidExt::Versioning::ClassMethods#versionable_keys

Defined in:
lib/mongoid_ext/versioning.rb

#versionable_keys(*keys) ⇒ Object

example:

class Foo
  include Mongoid::Document
  include MongoidExt::Versioning
  versionable_keys :field1, :field2, :field3, :user_class => "Customer", :owner_field => "updated_by_id"
  ...
end



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# File 'lib/mongoid_ext/versioning.rb', line 155

def versionable_keys(*keys)
  self.versionable_options = keys.extract_options!
  self.versionable_options[:owner_field] ||= "user_id"
  self.versionable_options[:owner_field] = self.versionable_options[:owner_field].to_s

  relationship = self.relations[self.versionable_options[:owner_field].sub(/_id$/, "")]
  if !relationship
    raise ArgumentError, "the supplied :owner_field => #{self.versionable_options[:owner_field].inspect} option is invalid"
  end
  self.versionable_options[:user_class] = relationship.class_name

  define_method(:save_version) do
    data = {}
    message = ""
    keys.each do |key|
      if change = changes[key.to_s]
        data[key.to_s] = change.first
      else
        data[key.to_s] = self[key]
      end
    end

    if message_changes = self.changes["version_message"]
      message = message_changes.first
    else
      version_message = ""
    end

    uuser_id = send(self.versionable_options[:owner_field]+"_was")||send(self.versionable_options[:owner_field])
    if !self.new_record? && !data.empty? && uuser_id
      max_versions = self.versionable_options[:max_versions].to_i
      if max_versions > 0 && self.version_ids.size >= max_versions
        old = self.version_ids.slice!(0, max_versions-1)
        self.class.skip_callback(:save, :before, :save_version)
        self.version_klass.where(:_id.in => old).delete_all
        self.save
        self.class.set_callback(:save, :before, :save_version)
      end

      self.version_klass.create!({
        'data' => data,
        'owner_id' => uuser_id,
        'target' => self,
        'message' => message
      })
    end
  end

  define_method(:versioned_keys) do
    keys
  end
end