Is there a way in which I could get the epic for an issue ?
The api returns a lot of information about an issue, but the epic is not included.
I'm using the JIRA REST API (https://developer.atlassian.com/display/JIRADEV/JIRA+REST+APIs).
Answer
I wanted to extract the epic name for an issue and this stumped me for a few days.
The key was to realise that an epic is just a parent issue, and the epic name is the summary field of the parent issue.
So:
Step 1
Find the custom field of where the epic is stored by using the editmeta query:
https://[your-jira-hostname]/jira/rest/api/2/issue/[issue-number]/editmeta
This will yield something like below which reveals the custom field Id we need
{
"fields": {
<SNIP>
"customfield_12360": {
"required": false,
"schema": {
"type": "any",
"custom": "com.pyxis.greenhopper.jira:gh-epic-link",
"customId": 12360
},
"name": "Epic Link",
"operations": [
"set"
]
}
<SNIP>
}
}
Step 2
Query your issue, pulling out the custom field value
https://[your-jira-hostname]/jira/rest/api/2/issue/[issue-number]?fields=customfield_12360,summary
if our issue is JIRA-34 say, this will yield something like
{
"expand": "renderedFields,names,schema,operations,editmeta,changelog,versionedRepresentations",
"id": "39080",
"key": "JIRA-34",
"fields": {
"summary": "Write heavily upvoted answers for stack overflow",
"customfield_12360": "JIRA-33"
}
}
Step 3
Now we know the issue number of our epic is JIRA-33, so now query the epic...
https://[your-jira-hostname]/jira/rest/api/2/issue/JIRA-33?fields=summary
{
"expand": "renderedFields,names,schema,operations,editmeta,changelog,versionedRepresentations",
"id": "39080",
"key": "JIRA-33",
"fields": {
"summary": "Improve StackOverflow reptuation"
}
}
The name of the epic for JIRA-34 is "Improve StackOverflow reptuation"
Done.