join list of dictionaries - list

Question

I have a list of macaddresses and network adapters that I'd like to combine into single list.
vars:
network_adapters:
- name: "Network adapter one"
- name: "Network adapter two"
macaddresses:
- "00:50:56:9c:8c:b1"
- "00:50:56:9c:8c:b2"
It can be done with below method using additional variable but I'm hoping for oneliner.
- name: "Set fact"
set_fact:
network_interfaces: >-
{{
network_interfaces | default([])
+ [item[0] | combine({'macaddress':item[1]})]
}}
loop: "{{ network_adapters | zip(macaddresses) }}"
outputs:
{
"macaddress": "00:50:56:9c:8c:b1",
"name": "Network adapter one"
},
{
"macaddress": "00:50:56:9c:8c:b2",
"name": "Network adapter two"
}
Here are some of my tryouts, maybe someone finds it useful.
add hash to the macaddresses list
"{{ macaddresses | json_query('[].{\"macaddress\": #}') }}"
{
"macaddress": "00:50:56:9c:8c:b1"
},
{
"macaddress": "00:50:56:9c:8c:b2"
}
combine into a list of hashes
"{{ macaddresses | json_query('[].{\"macaddress\": #}') | zip(network_adapters) }}"
[
{
"macaddress": "00:50:56:9c:8c:b1"
},
{
"name": "Network adapter one"
}
],
[
{
"macaddress": "00:50:56:9c:8c:b2"
},
{
"name": "Network adapter two"
}
]
combine into a dictionary
"{{ macaddresses | json_query('[].{\"macaddress\": #}') | map('combine', network_adapters) }}"
{
"macaddress": "00:50:56:9c:8c:b1",
"name": "Network adapter two"
},
{
"macaddress": "00:50:56:9c:8c:b2",
"name": "Network adapter two"
}
I'm specially interested in the last one. This outputs dictionary with the last network_adapters item both times.
Is it a bug?

Answer 1

The task does the job
- debug:
msg: "{{ dict(network_adapters|map(attribute='name')|zip(macaddresses))|
dict2items(key_name='name', value_name='macaddress') }}"
gives
msg:
- macaddress: 00:50:56:9c:8c:b1
name: Network adapter one
- macaddress: 00:50:56:9c:8c:b2
name: Network adapter two
Q: "More complex data. Keep other attributes, like 'ip'?"
network_adapters:
- name: "Network adapter one"
ip: "192.168.0.1"
- name: "Network adapter two"
ip: "192.168.0.2"
A: No "one-liner", just the loop (you've already found out), e.g.
- set_fact:
na2: "{{ na2|default([]) + [item.0|combine({'macaddress': item.1})] }}"
with_together:
- "{{ network_adapters }}"
- "{{ macaddresses }}"
gives
na2:
- ip: 192.168.0.1
macaddress: 00:50:56:9c:8c:b1
name: Network adapter one
- ip: 192.168.0.2
macaddress: 00:50:56:9c:8c:b2
name: Network adapter two