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Contents
module MongoModel
module AttributeMethods
module Dirty
extend ActiveSupport::Concern
include ActiveModel::Dirty
included do
before_save { @previously_changed = changes }
after_save { changed_attributes.clear }
end
def write_attribute(key, value)
attr = key.to_sym
# The attribute already has an unsaved change.
if changed_attributes.include?(attr)
old = changed_attributes[attr]
changed_attributes.delete(attr) if value == old
else
old = clone_attribute_value(attr)
changed_attributes[attr] = old unless value == old
end
super
end
# Returns the attributes as they were before any changes were made to the document.
def original_attributes
{}.with_indifferent_access.merge(attributes).merge(changed_attributes)
end
protected
def changed_attributes
@changed_attributes ||= {}.with_indifferent_access
end
private
def clone_attribute_value(attribute_name)
value = self[attribute_name.to_sym]
value.duplicable? ? value.clone : value
rescue TypeError, NoMethodError
value
end
end
end
end
Version data entries
26 entries across 26 versions & 1 rubygems