diff options
Diffstat (limited to 'activerecord')
6 files changed, 99 insertions, 51 deletions
diff --git a/activerecord/lib/active_record/attribute.rb b/activerecord/lib/active_record/attribute.rb index 74b44810d4..3c4c8f10ec 100644 --- a/activerecord/lib/active_record/attribute.rb +++ b/activerecord/lib/active_record/attribute.rb @@ -5,8 +5,8 @@ module ActiveRecord FromDatabase.new(name, value, type) end - def from_user(name, value, type) - FromUser.new(name, value, type) + def from_user(name, value, type, original_attribute = nil) + FromUser.new(name, value, type, original_attribute) end def with_cast_value(name, value, type) @@ -26,10 +26,11 @@ module ActiveRecord # This method should not be called directly. # Use #from_database or #from_user - def initialize(name, value_before_type_cast, type) + def initialize(name, value_before_type_cast, type, original_attribute = nil) @name = name @value_before_type_cast = value_before_type_cast @type = type + @original_attribute = original_attribute end def value @@ -38,21 +39,33 @@ module ActiveRecord @value end + def original_value + if assigned? + original_attribute.original_value + else + type_cast(value_before_type_cast) + end + end + def value_for_database type.serialize(value) end - def changed_from?(old_value) - type.changed?(old_value, value, value_before_type_cast) + def changed? + changed_from_assignment? || changed_in_place? + end + + def changed_in_place? + has_been_read? && type.changed_in_place?(original_value_for_database, value) end - def changed_in_place_from?(old_value) - has_been_read? && type.changed_in_place?(old_value, value) + def forgetting_assignment + with_value_from_database(value_for_database) end def with_value_from_user(value) type.assert_valid_value(value) - self.class.from_user(name, value, type) + self.class.from_user(name, value, type, self) end def with_value_from_database(value) @@ -64,7 +77,7 @@ module ActiveRecord end def with_type(type) - self.class.new(name, value_before_type_cast, type) + self.class.new(name, value_before_type_cast, type, original_attribute) end def type_cast(*) @@ -97,16 +110,39 @@ module ActiveRecord protected + attr_reader :original_attribute + alias_method :assigned?, :original_attribute + def initialize_dup(other) if defined?(@value) && @value.duplicable? @value = @value.dup end end + def changed_from_assignment? + assigned? && type.changed?(original_value, value, value_before_type_cast) + end + + def original_value_for_database + if assigned? + original_attribute.original_value_for_database + else + _original_value_for_database + end + end + + def _original_value_for_database + value_for_database + end + class FromDatabase < Attribute # :nodoc: def type_cast(value) type.deserialize(value) end + + def _original_value_for_database + value_before_type_cast + end end class FromUser < Attribute # :nodoc: diff --git a/activerecord/lib/active_record/attribute/user_provided_default.rb b/activerecord/lib/active_record/attribute/user_provided_default.rb index 501590cf0e..fb8ad9163e 100644 --- a/activerecord/lib/active_record/attribute/user_provided_default.rb +++ b/activerecord/lib/active_record/attribute/user_provided_default.rb @@ -4,8 +4,7 @@ module ActiveRecord class Attribute # :nodoc: class UserProvidedDefault < FromUser def initialize(name, value, type, database_default) - super(name, value, type) - @database_default = database_default + super(name, value, type, database_default) end def type_cast(value) @@ -16,17 +15,9 @@ module ActiveRecord end end - def changed_from?(old_value) - super || changed_from?(database_default.value) - end - def with_type(type) - self.class.new(name, value_before_type_cast, type, database_default) + self.class.new(name, value_before_type_cast, type, original_attribute) end - - protected - - attr_reader :database_default end end end diff --git a/activerecord/lib/active_record/attribute_methods/dirty.rb b/activerecord/lib/active_record/attribute_methods/dirty.rb index 43c15841c2..a2e4e0ac31 100644 --- a/activerecord/lib/active_record/attribute_methods/dirty.rb +++ b/activerecord/lib/active_record/attribute_methods/dirty.rb @@ -41,13 +41,15 @@ module ActiveRecord def init_internals super - @mutation_tracker = AttributeMutationTracker.new(@attributes, @attributes.dup) + @mutation_tracker = AttributeMutationTracker.new(@attributes) end def initialize_dup(other) # :nodoc: super - @mutation_tracker = AttributeMutationTracker.new(@attributes, - self.class._default_attributes.deep_dup) + @attributes = self.class._default_attributes.map do |attr| + attr.with_value_from_user(@attributes.fetch_value(attr.name)) + end + @mutation_tracker = AttributeMutationTracker.new(@attributes) end def changes_applied @@ -122,7 +124,8 @@ module ActiveRecord end def store_original_attributes - @mutation_tracker = @mutation_tracker.now_tracking(@attributes) + @attributes = @attributes.map(&:forgetting_assignment) + @mutation_tracker = AttributeMutationTracker.new(@attributes) end def previous_mutation_tracker diff --git a/activerecord/lib/active_record/attribute_mutation_tracker.rb b/activerecord/lib/active_record/attribute_mutation_tracker.rb index 08eb8ba7ac..ba7348918b 100644 --- a/activerecord/lib/active_record/attribute_mutation_tracker.rb +++ b/activerecord/lib/active_record/attribute_mutation_tracker.rb @@ -1,14 +1,13 @@ module ActiveRecord class AttributeMutationTracker # :nodoc: - def initialize(attributes, original_attributes) + def initialize(attributes) @attributes = attributes - @original_attributes = original_attributes end def changed_values attr_names.each_with_object({}.with_indifferent_access) do |attr_name, result| if changed?(attr_name) - result[attr_name] = original_attributes.fetch_value(attr_name) + result[attr_name] = attributes[attr_name].original_value end end end @@ -16,49 +15,34 @@ module ActiveRecord def changes attr_names.each_with_object({}.with_indifferent_access) do |attr_name, result| if changed?(attr_name) - result[attr_name] = [original_attributes.fetch_value(attr_name), attributes.fetch_value(attr_name)] + result[attr_name] = [attributes[attr_name].original_value, attributes.fetch_value(attr_name)] end end end def changed?(attr_name) attr_name = attr_name.to_s - modified?(attr_name) || changed_in_place?(attr_name) + attributes[attr_name].changed? end def changed_in_place?(attr_name) - original_database_value = original_attributes[attr_name].value_before_type_cast - attributes[attr_name].changed_in_place_from?(original_database_value) + attributes[attr_name].changed_in_place? end def forget_change(attr_name) attr_name = attr_name.to_s - original_attributes[attr_name] = attributes[attr_name].dup - end - - def now_tracking(new_attributes) - AttributeMutationTracker.new(new_attributes, clean_copy_of(new_attributes)) + attributes[attr_name] = attributes[attr_name].forgetting_assignment end protected - attr_reader :attributes, :original_attributes + attr_reader :attributes private def attr_names attributes.keys end - - def modified?(attr_name) - attributes[attr_name].changed_from?(original_attributes.fetch_value(attr_name)) - end - - def clean_copy_of(attributes) - attributes.map do |attr| - attr.with_value_from_database(attr.value_for_database) - end - end end class NullMutationTracker # :nodoc: diff --git a/activerecord/test/cases/attribute_methods_test.rb b/activerecord/test/cases/attribute_methods_test.rb index b67201d94d..8e5723c8e5 100644 --- a/activerecord/test/cases/attribute_methods_test.rb +++ b/activerecord/test/cases/attribute_methods_test.rb @@ -542,9 +542,6 @@ class AttributeMethodsTest < ActiveRecord::TestCase developer.save! - assert_equal "50000", developer.salary_before_type_cast - assert_equal 1337, developer.name_before_type_cast - assert_equal 50000, developer.salary assert_equal "1337", developer.name end diff --git a/activerecord/test/cases/attribute_test.rb b/activerecord/test/cases/attribute_test.rb index 0f216b7a13..a24a4fc6a4 100644 --- a/activerecord/test/cases/attribute_test.rb +++ b/activerecord/test/cases/attribute_test.rb @@ -182,12 +182,49 @@ module ActiveRecord assert attribute.has_been_read? end + test "an attribute is not changed if it hasn't been assigned or mutated" do + attribute = Attribute.from_database(:foo, 1, Type::Value.new) + + refute attribute.changed? + end + + test "an attribute is changed if it's been assigned a new value" do + attribute = Attribute.from_database(:foo, 1, Type::Value.new) + changed = attribute.with_value_from_user(2) + + assert changed.changed? + end + + test "an attribute is not changed if it's assigned the same value" do + attribute = Attribute.from_database(:foo, 1, Type::Value.new) + unchanged = attribute.with_value_from_user(1) + + refute unchanged.changed? + end + test "an attribute can not be mutated if it has not been read, and skips expensive calculations" do type_which_raises_from_all_methods = Object.new attribute = Attribute.from_database(:foo, "bar", type_which_raises_from_all_methods) - assert_not attribute.changed_in_place_from?("bar") + assert_not attribute.changed_in_place? + end + + test "an attribute is changed if it has been mutated" do + attribute = Attribute.from_database(:foo, "bar", Type::String.new) + attribute.value << "!" + + assert attribute.changed_in_place? + assert attribute.changed? + end + + test "an attribute can forget its changes" do + attribute = Attribute.from_database(:foo, "bar", Type::String.new) + changed = attribute.with_value_from_user("foo") + forgotten = changed.forgetting_assignment + + assert changed.changed? # sanity check + refute forgotten.changed? end test "with_value_from_user validates the value" do |