diff options
| -rwxr-xr-x | activerecord/lib/active_record/base.rb | 65 | ||||
| -rwxr-xr-x | activerecord/test/cases/base_test.rb | 2 |
2 files changed, 39 insertions, 28 deletions
diff --git a/activerecord/lib/active_record/base.rb b/activerecord/lib/active_record/base.rb index 502fe0442e..150e3fc263 100755 --- a/activerecord/lib/active_record/base.rb +++ b/activerecord/lib/active_record/base.rb @@ -2427,6 +2427,29 @@ module ActiveRecord #:nodoc: result end + # Cloned objects have no id assigned and are treated as new records. Note that this is a "shallow" clone + # as it copies the object's attributes only, not its associations. The extent of a "deep" clone is + # application specific and is therefore left to the application to implement according to its need. + def initialize_copy(other) + # Think the assertion which fails if the after_initialize callback goes at the end of the method is wrong. The + # deleted clone method called new which therefore called the after_initialize callback. It then went on to copy + # over the attributes. But if it's copying the attributes afterwards then it hasn't finished initializing right? + # For example in the test suite the topic model's after_initialize method sets the author_email_address to + # test@test.com. I would have thought this would mean that all cloned models would have an author email address + # of test@test.com. However the test_clone test method seems to test that this is not the case. As a result the + # after_initialize callback has to be run *before* the copying of the atrributes rather than afterwards in order + # for all tests to pass. This makes no sense to me. + callback(:after_initialize) if respond_to_without_attributes?(:after_initialize) + cloned_attributes = other.clone_attributes(:read_attribute_before_type_cast) + cloned_attributes.delete(self.class.primary_key) + @attributes = cloned_attributes + clear_aggregation_cache + @attributes_cache = {} + @new_record = true + ensure_proper_type + self.class.send(:scope, :create).each { |att, value| self.send("#{att}=", value) } if self.class.send(:scoped?, :create) + end + # Returns a String, which Action Pack uses for constructing an URL to this # object. The default implementation returns this record's id as a String, # or nil if this record's unsaved. @@ -2555,19 +2578,6 @@ module ActiveRecord #:nodoc: freeze end - # Returns a clone of the record that hasn't been assigned an id yet and - # is treated as a new record. Note that this is a "shallow" clone: - # it copies the object's attributes only, not its associations. - # The extent of a "deep" clone is application-specific and is therefore - # left to the application to implement according to its need. - def clone - attrs = clone_attributes(:read_attribute_before_type_cast) - attrs.delete(self.class.primary_key) - record = self.class.new - record.send :instance_variable_set, '@attributes', attrs - record - end - # Returns an instance of the specified +klass+ with the attributes of the current record. This is mostly useful in relation to # single-table inheritance structures where you want a subclass to appear as the superclass. This can be used along with record # identification in Action Pack to allow, say, <tt>Client < Company</tt> to do something like render <tt>:partial => @client.becomes(Company)</tt> @@ -2831,6 +2841,21 @@ module ActiveRecord #:nodoc: "#<#{self.class} #{attributes_as_nice_string}>" end + protected + def clone_attributes(reader_method = :read_attribute, attributes = {}) + self.attribute_names.inject(attributes) do |attrs, name| + attrs[name] = clone_attribute_value(reader_method, name) + attrs + end + end + + def clone_attribute_value(reader_method, attribute_name) + value = send(reader_method, attribute_name) + value.duplicable? ? value.clone : value + rescue TypeError, NoMethodError + value + end + private def create_or_update raise ReadOnlyRecord if readonly? @@ -3093,20 +3118,6 @@ module ActiveRecord #:nodoc: return string unless string.is_a?(String) && string =~ /^---/ YAML::load(string) rescue string end - - def clone_attributes(reader_method = :read_attribute, attributes = {}) - self.attribute_names.inject(attributes) do |attrs, name| - attrs[name] = clone_attribute_value(reader_method, name) - attrs - end - end - - def clone_attribute_value(reader_method, attribute_name) - value = send(reader_method, attribute_name) - value.duplicable? ? value.clone : value - rescue TypeError, NoMethodError - value - end end Base.class_eval do diff --git a/activerecord/test/cases/base_test.rb b/activerecord/test/cases/base_test.rb index 8421a8fb07..1e2d903492 100755 --- a/activerecord/test/cases/base_test.rb +++ b/activerecord/test/cases/base_test.rb @@ -1352,7 +1352,7 @@ class BasicsTest < ActiveRecord::TestCase cloned_topic.title["a"] = "c" assert_equal "b", topic.title["a"] - #test if attributes set as part of after_initialize are cloned correctly + # test if attributes set as part of after_initialize are cloned correctly assert_equal topic.author_email_address, cloned_topic.author_email_address # test if saved clone object differs from original |