Transform dictionary into lists for module consumption

[Geoff Webster]

I am trying to simplify some variable files for our developers and I am wondering if I can do this transform with existing filter/lookup plugins Ansible. 

I'll have this dictionary (and the fields are not static, there could be more settings):

OptionSettings:

      aws:elasticbeanstalk:command:

        BatchSize: '30'

        BatchSizeType: Percentage

      aws:elasticbeanstalk:sns:topics:

        Notification Endpoint: m...@example.com

And I want to transform the elements under OptionSettings to match what the module/API is expecting:

OptionSettingsTransform:

  - Namespace: aws:elasticbeanstalk:command

    OptionName: Batch Size

    Value: "30"

  - Namepsace: aws:elasticbeanstalk:command

    OptionName: BatchSizeType

    Value: Percentage

  - Namespace: aws:elasticbeanstalk:sns:topics

    OptionName: Notification Endpoint

    Value: m...@example.com

So it involves iterating over each subelement of OptionSettings and then each subelement of each namespace while retaining the namespace it is working within. I have tried looking at with_items, together, subelements, but I can't seem to wrap my head around it. Any ideas? Is this too much and would I need to implement a custom lookup plugin in python to do this?

Any help/suggestions would be appreciated :)

[Stephen Granger]

Use the jinja map attribute function to extract the items into a list.

I've put together an example here

http://docs.ansible.com/ansible/ec2_vpc_subnet_facts_module.html

There is some more documentation here with links here

http://docs.ansible.com/ansible/playbooks_filters.html

Sorry I don't have the time to go through a full example with your use case, hope this helps.

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Steve