diff options
Diffstat (limited to 'activemodel/lib/active_model')
| -rw-r--r-- | activemodel/lib/active_model/attribute_mutation_tracker.rb | 117 | ||||
| -rw-r--r-- | activemodel/lib/active_model/dirty.rb | 119 |
2 files changed, 116 insertions, 120 deletions
diff --git a/activemodel/lib/active_model/attribute_mutation_tracker.rb b/activemodel/lib/active_model/attribute_mutation_tracker.rb index 6abf37bd44..d8cd48a53b 100644 --- a/activemodel/lib/active_model/attribute_mutation_tracker.rb +++ b/activemodel/lib/active_model/attribute_mutation_tracker.rb @@ -1,14 +1,15 @@ # frozen_string_literal: true require "active_support/core_ext/hash/indifferent_access" +require "active_support/core_ext/object/duplicable" module ActiveModel class AttributeMutationTracker # :nodoc: OPTION_NOT_GIVEN = Object.new - def initialize(attributes) + def initialize(attributes, forced_changes = Set.new) @attributes = attributes - @forced_changes = Set.new + @forced_changes = forced_changes end def changed_attribute_names @@ -18,24 +19,22 @@ module ActiveModel def changed_values attr_names.each_with_object({}.with_indifferent_access) do |attr_name, result| if changed?(attr_name) - result[attr_name] = attributes[attr_name].original_value + result[attr_name] = original_value(attr_name) end end end def changes attr_names.each_with_object({}.with_indifferent_access) do |attr_name, result| - change = change_to_attribute(attr_name) - if change + if change = change_to_attribute(attr_name) result.merge!(attr_name => change) end end end def change_to_attribute(attr_name) - attr_name = attr_name.to_s if changed?(attr_name) - [attributes[attr_name].original_value, attributes.fetch_value(attr_name)] + [original_value(attr_name), fetch_value(attr_name)] end end @@ -44,29 +43,26 @@ module ActiveModel end def changed?(attr_name, from: OPTION_NOT_GIVEN, to: OPTION_NOT_GIVEN) - attr_name = attr_name.to_s - forced_changes.include?(attr_name) || - attributes[attr_name].changed? && - (OPTION_NOT_GIVEN == from || attributes[attr_name].original_value == from) && - (OPTION_NOT_GIVEN == to || attributes[attr_name].value == to) + attribute_changed?(attr_name) && + (OPTION_NOT_GIVEN == from || original_value(attr_name) == from) && + (OPTION_NOT_GIVEN == to || fetch_value(attr_name) == to) end def changed_in_place?(attr_name) - attributes[attr_name.to_s].changed_in_place? + attributes[attr_name].changed_in_place? end def forget_change(attr_name) - attr_name = attr_name.to_s attributes[attr_name] = attributes[attr_name].forgetting_assignment forced_changes.delete(attr_name) end def original_value(attr_name) - attributes[attr_name.to_s].original_value + attributes[attr_name].original_value end def force_change(attr_name) - forced_changes << attr_name.to_s + forced_changes << attr_name end private @@ -75,45 +71,108 @@ module ActiveModel def attr_names attributes.keys end + + def attribute_changed?(attr_name) + forced_changes.include?(attr_name) || !!attributes[attr_name].changed? + end + + def fetch_value(attr_name) + attributes.fetch_value(attr_name) + end + end + + class ForcedMutationTracker < AttributeMutationTracker # :nodoc: + def initialize(attributes, forced_changes = {}) + super + @finalized_changes = nil + end + + def changed_in_place?(attr_name) + false + end + + def change_to_attribute(attr_name) + if finalized_changes&.include?(attr_name) + finalized_changes[attr_name].dup + else + super + end + end + + def forget_change(attr_name) + forced_changes.delete(attr_name) + end + + def original_value(attr_name) + if changed?(attr_name) + forced_changes[attr_name] + else + fetch_value(attr_name) + end + end + + def force_change(attr_name) + forced_changes[attr_name] = clone_value(attr_name) unless attribute_changed?(attr_name) + end + + def finalize_changes + @finalized_changes = changes + end + + private + attr_reader :finalized_changes + + def attr_names + forced_changes.keys + end + + def attribute_changed?(attr_name) + forced_changes.include?(attr_name) + end + + def fetch_value(attr_name) + attributes.send(:_read_attribute, attr_name) + end + + def clone_value(attr_name) + value = fetch_value(attr_name) + value.duplicable? ? value.clone : value + rescue TypeError, NoMethodError + value + end end class NullMutationTracker # :nodoc: include Singleton - def changed_attribute_names(*) + def changed_attribute_names [] end - def changed_values(*) + def changed_values {} end - def changes(*) + def changes {} end def change_to_attribute(attr_name) end - def any_changes?(*) + def any_changes? false end - def changed?(*) + def changed?(attr_name, **) false end - def changed_in_place?(*) + def changed_in_place?(attr_name) false end - def forget_change(*) - end - - def original_value(*) - end - - def force_change(*) + def original_value(attr_name) end end end diff --git a/activemodel/lib/active_model/dirty.rb b/activemodel/lib/active_model/dirty.rb index 0d9e761b1e..ab2c9d04ae 100644 --- a/activemodel/lib/active_model/dirty.rb +++ b/activemodel/lib/active_model/dirty.rb @@ -1,7 +1,5 @@ # frozen_string_literal: true -require "active_support/hash_with_indifferent_access" -require "active_support/core_ext/object/duplicable" require "active_model/attribute_mutation_tracker" module ActiveModel @@ -122,9 +120,6 @@ module ActiveModel extend ActiveSupport::Concern include ActiveModel::AttributeMethods - OPTION_NOT_GIVEN = Object.new # :nodoc: - private_constant :OPTION_NOT_GIVEN - included do attribute_method_suffix "_changed?", "_change", "_will_change!", "_was" attribute_method_suffix "_previously_changed?", "_previous_change" @@ -145,10 +140,9 @@ module ActiveModel # +mutations_from_database+ to +mutations_before_last_save+ respectively. def changes_applied unless defined?(@attributes) - @previously_changed = changes + mutations_from_database.finalize_changes end @mutations_before_last_save = mutations_from_database - @attributes_changed_by_setter = ActiveSupport::HashWithIndifferentAccess.new forget_attribute_assignments @mutations_from_database = nil end @@ -159,7 +153,7 @@ module ActiveModel # person.name = 'bob' # person.changed? # => true def changed? - changed_attributes.present? + mutations_from_database.any_changes? end # Returns an array with the name of the attributes with unsaved changes. @@ -168,42 +162,37 @@ module ActiveModel # person.name = 'bob' # person.changed # => ["name"] def changed - changed_attributes.keys + mutations_from_database.changed_attribute_names end # Handles <tt>*_changed?</tt> for +method_missing+. - def attribute_changed?(attr, from: OPTION_NOT_GIVEN, to: OPTION_NOT_GIVEN) # :nodoc: - !!changes_include?(attr) && - (to == OPTION_NOT_GIVEN || to == _read_attribute(attr)) && - (from == OPTION_NOT_GIVEN || from == changed_attributes[attr]) + def attribute_changed?(attr_name, **options) # :nodoc: + mutations_from_database.changed?(attr_name.to_s, options) end # Handles <tt>*_was</tt> for +method_missing+. - def attribute_was(attr) # :nodoc: - attribute_changed?(attr) ? changed_attributes[attr] : _read_attribute(attr) + def attribute_was(attr_name) # :nodoc: + mutations_from_database.original_value(attr_name.to_s) end # Handles <tt>*_previously_changed?</tt> for +method_missing+. - def attribute_previously_changed?(attr) #:nodoc: - previous_changes_include?(attr) + def attribute_previously_changed?(attr_name) # :nodoc: + mutations_before_last_save.changed?(attr_name.to_s) end # Restore all previous data of the provided attributes. - def restore_attributes(attributes = changed) - attributes.each { |attr| restore_attribute! attr } + def restore_attributes(attr_names = changed) + attr_names.each { |attr_name| restore_attribute!(attr_name) } end # Clears all dirty data: current changes and previous changes. def clear_changes_information - @previously_changed = ActiveSupport::HashWithIndifferentAccess.new @mutations_before_last_save = nil - @attributes_changed_by_setter = ActiveSupport::HashWithIndifferentAccess.new forget_attribute_assignments @mutations_from_database = nil end def clear_attribute_changes(attr_names) - attributes_changed_by_setter.except!(*attr_names) attr_names.each do |attr_name| clear_attribute_change(attr_name) end @@ -216,13 +205,7 @@ module ActiveModel # person.name = 'robert' # person.changed_attributes # => {"name" => "bob"} def changed_attributes - # This should only be set by methods which will call changed_attributes - # multiple times when it is known that the computed value cannot change. - if defined?(@cached_changed_attributes) - @cached_changed_attributes - else - attributes_changed_by_setter.reverse_merge(mutations_from_database.changed_values).freeze - end + mutations_from_database.changed_values end # Returns a hash of changed attributes indicating their original @@ -232,9 +215,7 @@ module ActiveModel # person.name = 'bob' # person.changes # => { "name" => ["bill", "bob"] } def changes - cache_changed_attributes do - ActiveSupport::HashWithIndifferentAccess[changed.map { |attr| [attr, attribute_change(attr)] }] - end + mutations_from_database.changes end # Returns a hash of attributes that were changed before the model was saved. @@ -244,27 +225,23 @@ module ActiveModel # person.save # person.previous_changes # => {"name" => ["bob", "robert"]} def previous_changes - @previously_changed ||= ActiveSupport::HashWithIndifferentAccess.new - @previously_changed.merge(mutations_before_last_save.changes) + mutations_before_last_save.changes end def attribute_changed_in_place?(attr_name) # :nodoc: - mutations_from_database.changed_in_place?(attr_name) + mutations_from_database.changed_in_place?(attr_name.to_s) end private def clear_attribute_change(attr_name) - mutations_from_database.forget_change(attr_name) + mutations_from_database.forget_change(attr_name.to_s) end def mutations_from_database - unless defined?(@mutations_from_database) - @mutations_from_database = nil - end @mutations_from_database ||= if defined?(@attributes) ActiveModel::AttributeMutationTracker.new(@attributes) else - NullMutationTracker.instance + ActiveModel::ForcedMutationTracker.new(self) end end @@ -276,68 +253,28 @@ module ActiveModel @mutations_before_last_save ||= ActiveModel::NullMutationTracker.instance end - def cache_changed_attributes - @cached_changed_attributes = changed_attributes - yield - ensure - clear_changed_attributes_cache - end - - def clear_changed_attributes_cache - remove_instance_variable(:@cached_changed_attributes) if defined?(@cached_changed_attributes) - end - - # Returns +true+ if attr_name is changed, +false+ otherwise. - def changes_include?(attr_name) - attributes_changed_by_setter.include?(attr_name) || mutations_from_database.changed?(attr_name) - end - alias attribute_changed_by_setter? changes_include? - - # Returns +true+ if attr_name were changed before the model was saved, - # +false+ otherwise. - def previous_changes_include?(attr_name) - previous_changes.include?(attr_name) - end - # Handles <tt>*_change</tt> for +method_missing+. - def attribute_change(attr) - [changed_attributes[attr], _read_attribute(attr)] if attribute_changed?(attr) + def attribute_change(attr_name) + mutations_from_database.change_to_attribute(attr_name.to_s) end # Handles <tt>*_previous_change</tt> for +method_missing+. - def attribute_previous_change(attr) - previous_changes[attr] + def attribute_previous_change(attr_name) + mutations_before_last_save.change_to_attribute(attr_name.to_s) end # Handles <tt>*_will_change!</tt> for +method_missing+. - def attribute_will_change!(attr) - unless attribute_changed?(attr) - begin - value = _read_attribute(attr) - value = value.duplicable? ? value.clone : value - rescue TypeError, NoMethodError - end - - set_attribute_was(attr, value) - end - mutations_from_database.force_change(attr) + def attribute_will_change!(attr_name) + mutations_from_database.force_change(attr_name.to_s) end # Handles <tt>restore_*!</tt> for +method_missing+. - def restore_attribute!(attr) - if attribute_changed?(attr) - __send__("#{attr}=", changed_attributes[attr]) - clear_attribute_changes([attr]) + def restore_attribute!(attr_name) + attr_name = attr_name.to_s + if attribute_changed?(attr_name) + __send__("#{attr_name}=", attribute_was(attr_name)) + clear_attribute_change(attr_name) end end - - def attributes_changed_by_setter - @attributes_changed_by_setter ||= ActiveSupport::HashWithIndifferentAccess.new - end - - # Force an attribute to have a particular "before" value - def set_attribute_was(attr, old_value) - attributes_changed_by_setter[attr] = old_value - end end end |