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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