Problem with property which is a Collection: System Center 2012 VMM service

[jhellan]

Here's a very simple program that calls the VMM service and fails:

require 'ruby_odata'
svc = OData::Service.new "http://:9090/SC2012/VMM/Microsoft.Management.Odata.svc/", { :username => "blabla", :password=> "", :verify_ssl => false, :namespace => "VMM" }
svc.VirtualMachines
vms = svc.execute

The final statement fails with the following backtrace:

/var/lib/gems/1.9.1/gems/ruby_odata-0.1.3/lib/ruby_odata/service.rb:640:in `complex_type_to_class': undefined method `new' for nil:NilClass (NoMethodError)
    from /var/lib/gems/1.9.1/gems/ruby_odata-0.1.3/lib/ruby_odata/service.rb:682:in `parse_value'
    from /var/lib/gems/1.9.1/gems/ruby_odata-0.1.3/lib/ruby_odata/service.rb:393:in `block in entry_to_class'
    from /var/lib/gems/1.9.1/gems/nokogiri-1.5.6/lib/nokogiri/xml/node_set.rb:239:in `block in each'
    from /var/lib/gems/1.9.1/gems/nokogiri-1.5.6/lib/nokogiri/xml/node_set.rb:238:in `upto'
    from /var/lib/gems/1.9.1/gems/nokogiri-1.5.6/lib/nokogiri/xml/node_set.rb:238:in `each'
    from /var/lib/gems/1.9.1/gems/ruby_odata-0.1.3/lib/ruby_odata/service.rb:391:in `entry_to_class'
    from /var/lib/gems/1.9.1/gems/ruby_odata-0.1.3/lib/ruby_odata/service.rb:359:in `block in build_classes_from_result'
    from /var/lib/gems/1.9.1/gems/nokogiri-1.5.6/lib/nokogiri/xml/node_set.rb:239:in `block in each'
    from /var/lib/gems/1.9.1/gems/nokogiri-1.5.6/lib/nokogiri/xml/node_set.rb:238:in `upto'
    from /var/lib/gems/1.9.1/gems/nokogiri-1.5.6/lib/nokogiri/xml/node_set.rb:238:in `each'
    from /var/lib/gems/1.9.1/gems/ruby_odata-0.1.3/lib/ruby_odata/service.rb:358:in `build_classes_from_result'
    from /var/lib/gems/1.9.1/gems/ruby_odata-0.1.3/lib/ruby_odata/service.rb:306:in `handle_collection_result'
    from /var/lib/gems/1.9.1/gems/ruby_odata-0.1.3/lib/ruby_odata/service.rb:102:in `execute'
    from ./rb2.rb:7:in `'

A VirtualMachine entry can be found at https://gist.github.com/jhellan/5781766

I did some tracing, and found that it failed when it got to this property:

<d:VMNetworkAssignments m:type="Collection(VMM.VMNetworkAssignment)"/>

This is the first property that is a collection, so I wonder if that could be the reason.

[visoft]

Could you also provide me with a gist of the metadata for the service? Just request http://:9090/SC2012/VMM/Microsoft.Management.Odata.svc/$metadata

[jhellan]

Here it is: https://gist.github.com/jhellan/5789199

[visoft]

I need the actual resulting feed xml from the query, what is the results of the following query

http://:9090/SC2012/VMM/Microsoft.Management.Odata.svc/VirtualMachines?$top=1

(or change the $top to something else, just wanted to limit what you brought back)

The resulting XML should start with a <feed> element.

[jhellan]

Hope this helps: https://gist.github.com/jhellan/5789559

[visoft]

I checked the fix into the develop branch.

There may be another bug however. Could you get me the results of a query that returns an entity where you have a collection of complex types in the results. You'll probably have to eager load one of these.

A "complex type" would just be a class that is in the VMM namespace (like VMNetworkAssignment). I want to make sure I have coverage for that scenario now that the the complex type class resolves properly. I suspect it will work, but just want to make sure.

[jhellan]

Thanks. That worked.
As to the last question, is this relevant?

The following program fails:

require 'ruby_odata'
svc = OData::Service.new "http://:9090/SC2012/VMM/Microsoft.Management.Odata.svc/", { :username => "blabla", :password=> "", :verify_ssl => false, :namespace => "VMM" }
svc.HardwareProfiles.filter("Memory eq 3500")
hs = svc.execute

The gist https://gist.github.com/jhellan/5791590 contains the result when I do this with curl. I see

<category term="VMM.HardwareProfile" scheme="http://schemas.microsoft.com/ado/2007/08/dataservices/scheme"/>

The backtrace is

/var/lib/gems/1.9.1/gems/ruby_odata-0.1.3/lib/ruby_odata/service.rb:652:in `block in complex_type_to_class': undefined method `element=' for # (NoMethodError)
    from /var/lib/gems/1.9.1/gems/nokogiri-1.5.6/lib/nokogiri/xml/node_set.rb:239:in `block in each'
    from /var/lib/gems/1.9.1/gems/nokogiri-1.5.6/lib/nokogiri/xml/node_set.rb:238:in `upto'
    from /var/lib/gems/1.9.1/gems/nokogiri-1.5.6/lib/nokogiri/xml/node_set.rb:238:in `each'
    from /var/lib/gems/1.9.1/gems/ruby_odata-0.1.3/lib/ruby_odata/service.rb:651:in `complex_type_to_class'
    from /var/lib/gems/1.9.1/gems/ruby_odata-0.1.3/lib/ruby_odata/service.rb:689:in `parse_value'
    from /var/lib/gems/1.9.1/gems/ruby_odata-0.1.3/lib/ruby_odata/service.rb:393:in `block in entry_to_class'
    from /var/lib/gems/1.9.1/gems/nokogiri-1.5.6/lib/nokogiri/xml/node_set.rb:239:in `block in each'
    from /var/lib/gems/1.9.1/gems/nokogiri-1.5.6/lib/nokogiri/xml/node_set.rb:238:in `upto'
    from /var/lib/gems/1.9.1/gems/nokogiri-1.5.6/lib/nokogiri/xml/node_set.rb:238:in `each'
    from /var/lib/gems/1.9.1/gems/ruby_odata-0.1.3/lib/ruby_odata/service.rb:391:in `entry_to_class'
    from /var/lib/gems/1.9.1/gems/ruby_odata-0.1.3/lib/ruby_odata/service.rb:359:in `block in build_classes_from_result'
    from /var/lib/gems/1.9.1/gems/nokogiri-1.5.6/lib/nokogiri/xml/node_set.rb:239:in `block in each'
    from /var/lib/gems/1.9.1/gems/nokogiri-1.5.6/lib/nokogiri/xml/node_set.rb:238:in `upto'
    from /var/lib/gems/1.9.1/gems/nokogiri-1.5.6/lib/nokogiri/xml/node_set.rb:238:in `each'
    from /var/lib/gems/1.9.1/gems/ruby_odata-0.1.3/lib/ruby_odata/service.rb:358:in `build_classes_from_result'
    from /var/lib/gems/1.9.1/gems/ruby_odata-0.1.3/lib/ruby_odata/service.rb:306:in `handle_collection_result'
    from /var/lib/gems/1.9.1/gems/ruby_odata-0.1.3/lib/ruby_odata/service.rb:102:in `execute'
    from ./rb4.rb:9:in `'

[visoft]

Thanks!

That's exactly what I was thinking could been a problem. Try the latest version of the develop branch.

[jhellan]

Works great. Thanks!

Jon