Ansible merge json object - ansible

Question

I need to merge two JSON objects based on first object keys
object1 = {
"params" : {
"type": ["type1", "type2"],
"requeststate": []
}
}
object2 = {
"params" : {
"type": ["type2", "type3", "type4"],
"requeststate": ["Original", "Revised" ],
"responsestate": ["Approved" ]
}
}
I need to merge two object based on first object key and my output should look like below
mergedobject = {
"params" : {
"type": ["type1", "type2", "type3", "type4"],
"requeststate": ["Original", "Revised"]
}
}
i searched for my case and didnt find much details
Please let me know is it possible to do with ansible
I can able to merge array with
set_fact:
mergedrequeststate: "{{ object1.params.requeststate + object2.params.requeststate }}"
but my case involved with morethan 15 params object and I cant declare all the param object . Also it may grow in future and I need handle that if possible.
Please comment if you need more details.
Thanks for your support

Answer 1

Use the combine filter.
- set_fact:
mergedobject: "{{ object1.params | combine (object2.params) }}"

Answer 2

the requirement is well described, i would only add that you want to merge the keys and get the unique values from the 2 objects (if that's not the case, pay attention to the union filter in the PB below). Also, your example variables assume that the we want to merge the keys under objectX.params.
without further due, here is a PB that will get you going. there is 1 debug step to display all the keys your object1.params has, then a loop to merge the values of the 2 objects, then a final print.
PB:
---
- hosts: localhost
gather_facts: false
vars:
object1:
params:
type:
- type1
- type2
requeststate: []
object2:
params:
type:
- type2
- type3
- type4
requeststate:
- Original
- Revised
responsestate:
- Approved
tasks:
- name: print all the keys in the object1.params variable
debug:
msg: "{{ object1['params'].keys() | list }}"
- name: for each key, merge from the 2 variables
set_fact:
mergedobj: "{{ mergedobj|default({}) | combine({item: object1['params'][item] | union(object2['params'][item]) }) }}"
with_items:
- "{{ object1['params'].keys() | list }}"
- name: print final result
debug:
var: mergedobj
execution result:
[http_offline#greenhat-29 tests]$ ansible-playbook test.yml
PLAY [localhost] *******************************************************************************************************************************************************************************************************
TASK [print all the keys in the object1.params variable] ***************************************************************************************************************************************************************
ok: [localhost] => {
"msg": [
"type",
"requeststate"
]
}
TASK [for each key, merge from the 2 variables] ************************************************************************************************************************************************************************
ok: [localhost] => (item=type)
ok: [localhost] => (item=requeststate)
TASK [print final result] **********************************************************************************************************************************************************************************************
ok: [localhost] => {
"mergedobj": {
"requeststate": [
"Original",
"Revised"
],
"type": [
"type1",
"type2",
"type3",
"type4"
]
}
}
PLAY RECAP *************************************************************************************************************************************************************************************************************
localhost : ok=3 changed=0 unreachable=0 failed=0
[http_offline#greenhat-29 tests]$
hope it helps

Answer 3

you should check out the documentation, you can simply do:
- set_fact:
mergedobject: "{{ object1 | combine(object2, recursive=True) }}"