diff options
Diffstat (limited to 'activemodel/lib/active_model/dirty.rb')
| -rw-r--r-- | activemodel/lib/active_model/dirty.rb | 51 |
1 files changed, 43 insertions, 8 deletions
diff --git a/activemodel/lib/active_model/dirty.rb b/activemodel/lib/active_model/dirty.rb index 98ffffeb10..24214187af 100644 --- a/activemodel/lib/active_model/dirty.rb +++ b/activemodel/lib/active_model/dirty.rb @@ -15,8 +15,9 @@ module ActiveModel # * Call <tt>attr_name_will_change!</tt> before each change to the tracked # attribute. # * Call <tt>changes_applied</tt> after the changes are persisted. - # * Call <tt>reset_changes</tt> when you want to reset the changes + # * Call <tt>clear_changes_information</tt> when you want to reset the changes # information. + # * Call <tt>restore_attributes</tt> when you want to restore previous data. # # A minimal implementation could be: # @@ -36,11 +37,18 @@ module ActiveModel # # def save # # do persistence work + # # changes_applied # end # # def reload! - # reset_changes + # # get the values from the persistence layer + # + # clear_changes_information + # end + # + # def rollback! + # restore_attributes # end # end # @@ -72,6 +80,13 @@ module ActiveModel # person.reload! # person.previous_changes # => {} # + # Rollback the changes: + # + # person.name = "Uncle Bob" + # person.rollback! + # person.name # => "Bill" + # person.name_changed? # => false + # # Assigning the same value leaves the attribute unchanged: # # person.name = 'Bill' @@ -84,9 +99,11 @@ module ActiveModel # person.changed # => ["name"] # person.changes # => {"name" => ["Bill", "Bob"]} # - # If an attribute is modified in-place then make use of <tt>[attribute_name]_will_change!</tt> - # to mark that the attribute is changing. Otherwise ActiveModel can't track - # changes to in-place attributes. + # If an attribute is modified in-place then make use of + # +[attribute_name]_will_change!+ to mark that the attribute is changing. + # Otherwise Active Model can't track changes to in-place attributes. Note + # that Active Record can detect in-place modifications automatically. You do + # not need to call +[attribute_name]_will_change!+ on Active Record models. # # person.name_will_change! # person.name_change # => ["Bill", "Bill"] @@ -99,6 +116,7 @@ module ActiveModel included do attribute_method_suffix '_changed?', '_change', '_will_change!', '_was' attribute_method_affix prefix: 'reset_', suffix: '!' + attribute_method_affix prefix: 'restore_', suffix: '!' end # Returns +true+ if any attribute have unsaved changes, +false+ otherwise. @@ -165,17 +183,27 @@ module ActiveModel private # Removes current changes and makes them accessible through +previous_changes+. - def changes_applied + def changes_applied # :doc: @previously_changed = changes @changed_attributes = ActiveSupport::HashWithIndifferentAccess.new end - # Removes all dirty data: current changes and previous changes - def reset_changes + # Clear all dirty data: current changes and previous changes. + def clear_changes_information # :doc: @previously_changed = ActiveSupport::HashWithIndifferentAccess.new @changed_attributes = ActiveSupport::HashWithIndifferentAccess.new end + def reset_changes + ActiveSupport::Deprecation.warn "#reset_changes is deprecated and will be removed on Rails 5. Please use #clear_changes_information instead." + clear_changes_information + end + + # Restore all previous data. + def restore_attributes # :doc: + changed_attributes.each_key { |attr| restore_attribute! attr } + end + # Handle <tt>*_change</tt> for +method_missing+. def attribute_change(attr) [changed_attributes[attr], __send__(attr)] if attribute_changed?(attr) @@ -196,6 +224,13 @@ module ActiveModel # Handle <tt>reset_*!</tt> for +method_missing+. def reset_attribute!(attr) + ActiveSupport::Deprecation.warn "#reset_#{attr}! is deprecated and will be removed on Rails 5. Please use #restore_#{attr}! instead." + + restore_attribute!(attr) + end + + # Handle <tt>restore_*!</tt> for +method_missing+. + def restore_attribute!(attr) if attribute_changed?(attr) __send__("#{attr}=", changed_attributes[attr]) changed_attributes.delete(attr) |