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From: "David Lutterkort (JIRA)" <jira@apache.org>
To: dev@deltacloud.apache.org
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Subject: [jira] [Commented] (DTACLOUD-499) The 'ref' attributes are not
 (de)serialized properly when used in array
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    [ https://issues.apache.org/jira/browse/DTACLOUD-499?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13587988#comment-13587988 ] 

David Lutterkort commented on DTACLOUD-499:
-------------------------------------------

To produce an array of references you would write

  array :volume_templates, :ref => CIMI::Model::VolumeTemplate

though for MachineTemplate, things are a little messier, since the entry in the volume_templates array is basically a VolumeTemplate with an additional attribute (initialLocation). For that, you'd have to do (leaving out the CIMI::Model prefix)

 class VolumeTemplateWithLocation < VolumeTemplate
   text :initial_location
 end

  class MachineTemplate < Base
    array :volume_templates, :ref => VolumeTemplateWithLocation
  end

At least, that's my reading of the spec .. somewhat ugly. Might want to ask the working group to calrify.

                
> The 'ref' attributes are not (de)serialized properly when used in array
> -----------------------------------------------------------------------
>
>                 Key: DTACLOUD-499
>                 URL: https://issues.apache.org/jira/browse/DTACLOUD-499
>             Project: DeltaCloud
>          Issue Type: Bug
>          Components: CIMI/Frontend
>            Reporter: Michal Fojtik
>            Assignee: David Lutterkort
>         Attachments: 0001-CIMI-schema-make-it-possible-to-build-an-array-of-re.patch, 0001-Sample-test.patch
>
>
> If you have this definition in CIMI model (MachineTemplate in this case):
> array :volume_templates do
>   ref :volume_template
> end
> and you use this JSON in .from_json method to create an instance of the MachineTemplate:
> <snip>
> 'volume_templates' : [
>   { 'volumeConfig' : { 'capacity' : '12345' } }
> ]
> </snip>
> The resulting 'machine_template.volume_templates.first.volume_config.capacity' will be 'nil'.
> I tried to play a bit with the input JSON and I found that if you use this:
> <snip>
> 'volume_templates' : [
>   'volume_template' : {
>     { 'volumeConfig' : { 'capacity' : '12345' } }
>   }
> ]
> </snip>
> The resulting 'machine_template.volume_templates.first.volume_template.capacity' is set properly to '12345' :-)
> The XML output then looks like:
> <snip>
>         <volumeTemplate>
>           <volumeTemplate>
>             <volumeConfig>
>               <capacity>10240</capacity>
>             </volumeConfig>
>           </volumeTemplate>
>         </volumeTemplate>
> </snip>
> I think we need to do something smart in the 'array' to remove the upper 'volumeTemplate' or introduce something like 'ref_arr :volume_templates'.
> Anyway, I'm leaving this one to you David, as you might have better schema knowledge than me ;-)
> CC'ing Dies, as he reported this issue original in his email.

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