Sha256: 3d1bc7191b3bc6a8ddf4342747821e0e430abb1c97bafeff548f944b5c8f4a9b
Contents?: true
Size: 1.71 KB
Versions: 7
Compression:
Stored size: 1.71 KB
Contents
# encoding: utf-8
module Mongoid #:nodoc:
# Include this module to get automatic versioning of root level documents.
# This will add a version field to the +Document+ and a has_many association
# with all the versions contained in it.
module Versioning
extend ActiveSupport::Concern
included do
field :version, :type => Integer, :default => 1
embeds_many :versions, :class_name => self.name, :validate => false
set_callback :save, :before, :revise
delegate :version_max, :to => "self.class"
end
# Create a new version of the +Document+. This will load the previous
# document from the database and set it as the next version before saving
# the current document. It then increments the version number. If a #max_versions
# limit is set in the model and it's exceeded, the oldest version gets discarded.
#
# @example Revise the document.
# person.revise
def revise
last_version = self.class.first(:conditions => { :_id => id, :version => version })
if last_version
versions.target << last_version.clone
versions.shift if version_max.present? && versions.length > version_max
self.version = (version || 1 ) + 1
@modifications["versions"] = [ nil, versions.to_hash ] if @modifications
end
end
module ClassMethods #:nodoc:
attr_accessor :version_max
# Sets the maximum number of versions to store.
#
# @example Set the maximum.
# Person.max_versions(5)
#
# @param [ Integer ] number The maximum number to store.
#
# @return [ Integer ] The max number of versions.
def max_versions(number)
self.version_max = number.to_i
end
end
end
end
Version data entries
7 entries across 7 versions & 2 rubygems