Copy cascading customfield value from epic to child issues

[Lean Li]

I have a cascading custom field on Epics and Tasks. What should be the JSON syntax in my Jira automation for copying the value from the parent Epic to it's Task.

At the moment the locig in the automation is this:

• Trigger: issue created
• Condition: confirm the issue has an epic link (not empty)
• Action: edit issue to copy the parent epic's fields: components, customfield_15800 (advanced)

I have tried this JSON, but i doesn't work - automation copies component field but doesn't copy the value in customField_15800 to a task from it's parent epic (automation end is succes though):

{
"update": {
"customField_15800": [
{
"set": {
"value": "{{triggerIssue.fields.customField_15800.value}}",
"child": {
"value": "{{triggerIssue.fields.customField_15800.child.value}}"
}
}
}
]
}
}

Any idea on what the syntax should be would be greatly appreciated. Thank you alredy in advance!

[Vikrant Yadav · Accepted solution]

Hi @Lean Li  For updating a cascading field this is the format : 

Cascading select custom field

Select a single parent value, and a related child value. You can address them by value or id.

"customfield_11447" : { "value": "parent_option1", "child": { "value" : "p1_child1"} }

or

"customfield_11447" : { "id": 10112, "child": { "id" : 10115 } }

{
"fields": {
"customfield_10305" : { "value": "{{cascadingParentValue}}", "child": { "value" : "{{cascadingChildValue}}"} }
}
}

[Vikrant Yadav]

https://support.atlassian.com/cloud-automation/docs/advanced-field-editing-using-json/

[Lean Li]

Thanks this helped a lot! With this automation structure and these variable values I got it working:

• cascadingParentValue
  {{Issue.fields.customField_15800.value}}
• cascadingChildValue
  {{issue.fields.customField_15800.child.value}}

[Vikrant Yadav]

Glad to hear I am able to help you! 

[claire_povey]

I'm having the same issue, but following the steps above doesn't appear to work, so I must be missing something. I have a cascading select list, I'd like for any changes to that field on the Epic to copy to each child work item. Any help would be gratefully received. For context, the field is called Contract (Id 10740). Thanks

My rule so far is:

When Value changes for Contract, and Issue Type is Epic, Branch, For Children, create variables, Then Edit Work Item Field, I'm then using the syntax:

{
"fields": {
"customfield_10740" : { "value": "{{cascadingParentValue}}", "child": { "value" : "{{cascadingChildValue}}"} }
}
}

Upon saving I see error - 

Additional fields contains invalid field(s) in 'update' or 'fields' section: customfieldid_10740

Is this suggesting the custom field id is not in fact 10740 or is the JSON wrong please?

[claire_povey]

Actually, I've solved it. For anyone else with the same issue I used the below syntax and removed the create variables:

{
"fields": {
"Contract": {
"value": "{{triggerIssue.fields.Contract.value}}",
"child": {
"value": "{{triggerIssue.fields.Contract.child.value}}"
}
}
}
}