diff options
Diffstat (limited to 'activeresource/lib')
| -rw-r--r-- | activeresource/lib/active_resource/base.rb | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/activeresource/lib/active_resource/base.rb b/activeresource/lib/active_resource/base.rb index 37e77d4f93..d854b9baed 100644 --- a/activeresource/lib/active_resource/base.rb +++ b/activeresource/lib/active_resource/base.rb @@ -606,6 +606,43 @@ module ActiveResource load(attributes) end + # Returns a clone of the resource that hasn't been assigned an id yet and + # is treated as a new resource. + # + # ryan = Person.find(1) + # not_ryan = ryan.clone + # not_ryan.new? # => true + # + # Any active resource member attributes will NOT be cloned, though all other + # attributes are. This is to prevent the conflict between any prefix_options + # that refer to the original parent resource and the newly cloned parent + # resource that does not exist. + # + # ryan = Person.find(1) + # ryan.address = StreetAddress.find(1, :person_id => ryan.id) + # ryan.hash = {:not => "an ARes instance"} + # + # not_ryan = ryan.clone + # not_ryan.new? # => true + # not_ryan.address # => NoMethodError + # not_ryan.hash # => {:not => "an ARes instance"} + # + def clone + # Clone all attributes except the pk and any nested ARes + attrs = self.attributes.reject {|k,v| k == self.class.primary_key || v.is_a?(ActiveResource::Base)}.inject({}) do |attrs, (k, v)| + attrs[k] = v.clone + attrs + end + # Form the new resource - bypass initialize of resource with 'new' as that will call 'load' which + # attempts to convert hashes into member objects and arrays into collections of objects. We want + # the raw objects to be cloned so we bypass load by directly setting the attributes hash. + resource = self.class.new({}) + resource.prefix_options = self.prefix_options + resource.send :instance_variable_set, '@attributes', attrs + resource + end + + # A method to determine if the resource a new object (i.e., it has not been POSTed to the remote service yet). # # ==== Examples |