Look at the json_query filter. You can use it with JMESPath queries to extract
what you need.
V/r,
James Cassell
On Fri, Dec 21, 2018, at 6:13 PM, Justin DynamicD wrote:
> First I apologize if this was covered elsewhere, but nothing seemed to
> match my scenario... at least not in a way I could recreate.
>
> I have a role that builds a list of dictionaries. I've found it fairly
> easy to extend this list, add attributes to individual items, etc, but I'm
> having a real problem "reducing" the output or creating a simplified
> dictionary from the complex one.
>
> The scenario:
>
> Assume I have a list that looks something like this:
>
> drives:
> - volume: 0
> size_kb: 102400
> name: drive1
> datastore: alpha
> - volume: 1
> size_gb: 50
> name: drive2
> datastore: alpha
>
>
> In this case, I discover with minor manipulation, I can drop {{ drives }}
> right into my vmware_guest module as long as I filter down to just the
> relevant attributes. If I drop it in as-is, however, it fails because it
> doesn't know what some of the attributes are. So I want to make it look
> something like this:
>
> drives:
> - size_kb: 102400
> datastore: alpha
> - size_gb: 50
> datastore: alpha
>
> I've tried using selectattr() and rejectattr(), but those seem to
> accept/reject the entire dictionary based on an attribute. I'm hoping to
> simply filter out irrelevant attributes instead. I tried just making a new
> list but then had issues with dealing with the "size_*" attributes as one
> is kb and the other is gb. Basically I would love to have some kind of
> filter where I set a new fact and simply inject every attribute that is
> relevant.
>
> - set_fact:
> new_disks: "{{ new_disks | default([]) + [ drives |
> selectonly('datastore','size_*') ] }}"
> loop: "{{ drives }}"
> loop_control:
> loop_var: loop_drives
>
> Sadly, I've been coming up empty when it comes to "trimming" an object
> down. Any ideas?
>
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