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Versions: 12
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Contents
module CouchPotato
module Persistence
module DirtyAttributes
def self.included(base)
base.class_eval do
after_save :reset_dirty_attributes
def initialize(attributes = {})
super
assign_attribute_copies_for_dirty_tracking
end
end
end
# returns true if a model has dirty attributes, i.e. their value has changed since the last save
def dirty?
new? || self.class.properties.inject(false) do |res, property|
res || property.dirty?(self)
end
end
private
def assign_attribute_copies_for_dirty_tracking
attributes.each do |name, value|
self.instance_variable_set("@#{name}_was", clone_attribute(value))
end if attributes
end
def reset_dirty_attributes
self.class.properties.each do |property|
instance_variable_set("@#{property.name}_was", clone_attribute(send(property.name)))
end
end
def clone_attribute(value)
if [Fixnum, Symbol, TrueClass, FalseClass, NilClass, Float].include?(value.class)
value
elsif [Hash, Array].include?(value.class)
#Deep clone
Marshal::load(Marshal::dump(value))
else
value.clone
end
end
end
end
end
Version data entries
12 entries across 12 versions & 2 rubygems