Rails core - Feb 2011 - Possible bug? ActiveResource in JSON format fails out of the box.

I am doing some tests with a simple rails app. Next to that I''ve
created an
ActiveResource object that connects to this application to use it''s
api.

But I want/need to use json format instead of the default (=xml).

I''ve come to the conclusion that out-of-the-box that ActiveResource in
json
is broken when doing updates (put requests) or I''m doing something
wrong

A sample application can be found here:
https://github.com/khelben/activeresource_test

More in detail, the ActiveResource tests can be found in lib/employee.rb:
https://github.com/khelben/activeresource_test/blob/master/lib/employee.rb

All tests consists of the same steps:

- creating an employee
- updating its name

I try these steps in both xml and json format, here are my conclusions:

- XML create and update work fine!
- JSON create works fine!
- JSON update fails!

From what I can see from the rails server output is that the params has some
unusual attributes:

This is the complete data provided with the put request:

Parameters: {"employee"=>{"name"=>"Randy",
"id"=>"44",
*"employee"=>{"employee"=>{"name"=>"Randy",
"created_at"=>"2011-02-24T11:20:22Z",
"updated_at"=>"2011-02-24T11:20:22Z",
"id"=>44, "full_name"=>nil}}*,
"full_name"=>"Something"},
"id"=>"44"}

It is strange that the params include some unnecessary attributes (indicated
in bold).

So I think it''s related to have the serialization is handled, depending
on
the format, the next tests in the same file prove me right:

When I just change the format from XML (
https://github.com/khelben/activeresource_test/blob/master/lib/employee.rb#L41)
to JSON (
https://github.com/khelben/activeresource_test/blob/master/lib/employee.rb#L77)
the same tests produces other output?

once again, I see that when using format json, the output of both
''#encode''
and ''#to_json'' contains unnecessary data, which causes the
server to fail to
update the resource.

If someone could confirm these findings and eventually to provide some
pointers onto where to solve this, I would be happy to fix this.

TIA

Christiaan







<https://github.com/khelben/activeresource_test>

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