Github : How to list milestone updates for an issue - github

Question

How to list for a specific ticket the current milestone and its precedent assigned ones if applicable (+ date of each milestone update) ? I checked in the github API (https://developer.github.com/v3/issues/#get-a-single-issue) and I can extract the current milestone but not the previous assigned ones (if they exist). Any idea ?
Thank you,

Answer 1

You can use the Issues Events API. To test this I went to a test issue and:
Added milestone new
Added milestone two
After using that endpoint to query the API I got three events, two with type milestoned and one demilestoned. The endpoint allows you to filter for those events specifically to remove noise on very active issues. Here is an example of the reply (with obfuscated data)
[
{
"id": 2193329921,
"url": "https://api.github.com/repos/myOrg/myRepo/issues/events/2193329921",
"actor": {
"login": "myuser",
"id": 1192590,
"node_id": "MDQ6VXNlcjExOTI1OTA=",
"gravatar_id": "",
"url": "https://api.github.com/users/myuser",
"html_url": "https://github.com/myuser",
"followers_url": "https://api.github.com/users/myuser/followers",
"following_url": "https://api.github.com/users/myuser/following{/other_user}",
"gists_url": "https://api.github.com/users/myuser/gists{/gist_id}",
"starred_url": "https://api.github.com/users/myuser/starred{/owner}{/repo}",
"subscriptions_url": "https://api.github.com/users/myuser/subscriptions",
"organizations_url": "https://api.github.com/users/myuser/orgs",
"repos_url": "https://api.github.com/users/myuser/repos",
"events_url": "https://api.github.com/users/myuser/events{/privacy}",
"received_events_url": "https://api.github.com/users/myuser/received_events",
"type": "User",
"site_admin": true
},
"event": "milestoned",
"commit_id": null,
"commit_url": null,
"created_at": "2019-03-11T09:42:00Z",
"milestone": {
"title": "new"
}
},
{
"id": 2193330104,
"url": "https://api.github.com/repos/myOrg/myRepo/issues/events/2193330104",
"actor": {
"login": "myuser",
"id": 1192590,
"url": "https://api.github.com/users/myuser",
"html_url": "https://github.com/myuser",
"followers_url": "https://api.github.com/users/myuser/followers",
"following_url": "https://api.github.com/users/myuser/following{/other_user}",
"gists_url": "https://api.github.com/users/myuser/gists{/gist_id}",
"starred_url": "https://api.github.com/users/myuser/starred{/owner}{/repo}",
"subscriptions_url": "https://api.github.com/users/myuser/subscriptions",
"organizations_url": "https://api.github.com/users/myuser/orgs",
"repos_url": "https://api.github.com/users/myuser/repos",
"events_url": "https://api.github.com/users/myuser/events{/privacy}",
"received_events_url": "https://api.github.com/users/myuser/received_events",
"type": "User",
"site_admin": true
},
"event": "demilestoned",
"commit_id": null,
"commit_url": null,
"created_at": "2019-03-11T09:42:04Z",
"milestone": {
"title": "new"
}
},
{
"id": 2193330105,
"url": "https://api.github.com/repos/myOrg/myRepo/issues/events/2193330105",
"actor": {
"login": "myuser",
"url": "https://api.github.com/users/myuser",
"html_url": "https://github.com/myuser",
"followers_url": "https://api.github.com/users/myuser/followers",
"following_url": "https://api.github.com/users/myuser/following{/other_user}",
"gists_url": "https://api.github.com/users/myuser/gists{/gist_id}",
"starred_url": "https://api.github.com/users/myuser/starred{/owner}{/repo}",
"subscriptions_url": "https://api.github.com/users/myuser/subscriptions",
"organizations_url": "https://api.github.com/users/myuser/orgs",
"repos_url": "https://api.github.com/users/myuser/repos",
"events_url": "https://api.github.com/users/myuser/events{/privacy}",
"received_events_url": "https://api.github.com/users/myuser/received_events",
"type": "User",
"site_admin": true
},
"event": "milestoned",
"commit_id": null,
"commit_url": null,
"created_at": "2019-03-11T09:42:04Z",
"milestone": {
"title": "second"
}
}
]