obsolete.ChilliProject/app/models/journal.rb

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#-- copyright
# ChiliProject is a project management system.
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#
# Copyright (C) 2010-2011 the ChiliProject Team
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#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
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#
# See doc/COPYRIGHT.rdoc for more details.
#++
require_dependency 'journal_formatter'
# The ActiveRecord model representing journals.
class Journal < ActiveRecord::Base
unloadable
include Comparable
include JournalFormatter
include JournalDeprecated
# Make sure each journaled model instance only has unique version ids
validates_uniqueness_of :version, :scope => [:journaled_id, :type]
belongs_to :journaled
belongs_to :user
# ActiveRecord::Base#changes is an existing method, so before serializing the +changes+ column,
# the existing +changes+ method is undefined. The overridden +changes+ method pertained to
# dirty attributes, but will not affect the partial updates functionality as that's based on
# an underlying +changed_attributes+ method, not +changes+ itself.
# undef_method :changes
serialize :changes, Hash
# In conjunction with the included Comparable module, allows comparison of journal records
# based on their corresponding version numbers, creation timestamps and IDs.
def <=>(other)
[version, created_at, id].map(&:to_i) <=> [other.version, other.created_at, other.id].map(&:to_i)
end
# Returns whether the version has a version number of 1. Useful when deciding whether to ignore
# the version during reversion, as initial versions have no serialized changes attached. Helps
# maintain backwards compatibility.
def initial?
version < 2
end
# The anchor number for html output
def anchor
version - 1
end
# Possible shortcut to the associated project
def project
if journaled.respond_to?(:project)
journaled.project
elsif journaled.is_a? Project
journaled
else
nil
end
end
def editable_by?(user)
journaled.journal_editable_by?(user)
end
def details
attributes["changes"] || {}
end
alias_method :changes, :details
def new_value_for(prop)
details[prop.to_s].last if details.keys.include? prop.to_s
end
def old_value_for(prop)
details[prop.to_s].first if details.keys.include? prop.to_s
end
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# Returns a string of css classes
def css_classes
s = 'journal'
s << ' has-notes' unless notes.blank?
s << ' has-details' unless details.empty?
s
end
# This is here to allow people to disregard the difference between working with a
# Journal and the object it is attached to.
# The lookup is as follows:
## => Call super if the method corresponds to one of our attributes (will end up in AR::Base)
## => Try the journaled object with the same method and arguments
## => On error, call super
def method_missing(method, *args, &block)
return super if attributes[method.to_s]
journaled.send(method, *args, &block)
rescue NoMethodError => e
e.name == method ? super : raise(e)
end
end