diff options
Diffstat (limited to 'activemodel/lib/active_model/dirty.rb')
| -rw-r--r-- | activemodel/lib/active_model/dirty.rb | 60 |
1 files changed, 41 insertions, 19 deletions
diff --git a/activemodel/lib/active_model/dirty.rb b/activemodel/lib/active_model/dirty.rb index cafdb946c0..98ffffeb10 100644 --- a/activemodel/lib/active_model/dirty.rb +++ b/activemodel/lib/active_model/dirty.rb @@ -14,13 +14,9 @@ module ActiveModel # track. # * Call <tt>attr_name_will_change!</tt> before each change to the tracked # attribute. - # - # If you wish to also track previous changes on save or update, you need to - # add: - # - # @previously_changed = changes - # - # inside of your save or update method. + # * Call <tt>changes_applied</tt> after the changes are persisted. + # * Call <tt>reset_changes</tt> when you want to reset the changes + # information. # # A minimal implementation could be: # @@ -39,8 +35,12 @@ module ActiveModel # end # # def save - # @previously_changed = changes - # @changed_attributes.clear + # # do persistence work + # changes_applied + # end + # + # def reload! + # reset_changes # end # end # @@ -54,6 +54,7 @@ module ActiveModel # person.name = 'Bob' # person.changed? # => true # person.name_changed? # => true + # person.name_changed?(from: "Uncle Bob", to: "Bob") # => true # person.name_was # => "Uncle Bob" # person.name_change # => ["Uncle Bob", "Bob"] # person.name = 'Bill' @@ -65,6 +66,12 @@ module ActiveModel # person.changed? # => false # person.name_changed? # => false # + # Reset the changes: + # + # person.previous_changes # => {"name" => ["Uncle Bob", "Bill"]} + # person.reload! + # person.previous_changes # => {} + # # Assigning the same value leaves the attribute unchanged: # # person.name = 'Bill' @@ -129,7 +136,7 @@ module ActiveModel # person.save # person.previous_changes # => {"name" => ["bob", "robert"]} def previous_changes - @previously_changed + @previously_changed ||= ActiveSupport::HashWithIndifferentAccess.new end # Returns a hash of the attributes with unsaved changes indicating their original @@ -139,14 +146,34 @@ module ActiveModel # person.name = 'robert' # person.changed_attributes # => {"name" => "bob"} def changed_attributes - @changed_attributes ||= {} + @changed_attributes ||= ActiveSupport::HashWithIndifferentAccess.new + end + + # Handle <tt>*_changed?</tt> for +method_missing+. + def attribute_changed?(attr, options = {}) #:nodoc: + result = changed_attributes.include?(attr) + result &&= options[:to] == __send__(attr) if options.key?(:to) + result &&= options[:from] == changed_attributes[attr] if options.key?(:from) + result + end + + # Handle <tt>*_was</tt> for +method_missing+. + def attribute_was(attr) # :nodoc: + attribute_changed?(attr) ? changed_attributes[attr] : __send__(attr) end private - # Handle <tt>*_changed?</tt> for +method_missing+. - def attribute_changed?(attr) - changed_attributes.include?(attr) + # Removes current changes and makes them accessible through +previous_changes+. + def changes_applied + @previously_changed = changes + @changed_attributes = ActiveSupport::HashWithIndifferentAccess.new + end + + # Removes all dirty data: current changes and previous changes + def reset_changes + @previously_changed = ActiveSupport::HashWithIndifferentAccess.new + @changed_attributes = ActiveSupport::HashWithIndifferentAccess.new end # Handle <tt>*_change</tt> for +method_missing+. @@ -154,11 +181,6 @@ module ActiveModel [changed_attributes[attr], __send__(attr)] if attribute_changed?(attr) end - # Handle <tt>*_was</tt> for +method_missing+. - def attribute_was(attr) - attribute_changed?(attr) ? changed_attributes[attr] : __send__(attr) - end - # Handle <tt>*_will_change!</tt> for +method_missing+. def attribute_will_change!(attr) return if attribute_changed?(attr) |