get wikidata first and last revision timestamp

问题

I want to get the first and the last revision timestamp of a wikidata Item (for example Kevin Kratz), I tried with the wikidata api: -first timestamp: https://www.wikidata.org/w/api.php?action=query&titles=Kevin+Kratz&prop=revisions&rvdir=newer&rvlimit=1&format=json -last timestamp: https://www.wikidata.org/w/api.php?action=query&prop=revisions&rvlimit=1&rvprop=timestamp&titles=Kevin+Kratz&format=json but it didn't return the timestamps:

{"batchcomplete":"","query":{"pages":{"-1":{"ns":0,"title":"Kevin Kratz","missing":""}}}}

回答1:

Use there Api Sandbox to create the query.

Set list=allrevisions to get all the revisions.

Use arvlimit to 1 to limit the response to 1 revision.

Sort the list to newer or older to get the first/last;

arvdir=newer
arvdir=older

Final url;

https://www.wikidata.org/w/api.php?action=query&format=json&list=allrevisions&titles=Kevin%20Kratz&arvprop=ids|timestamp|flags|comment|user&arvlimit=1&arvdir=older

Result (Just the timestamps..)

-> newer
"timestamp": "2004-07-16T02:43:38Z",

-> Older
"timestamp": "2020-03-06T16:33:59Z",

Link to Api sandbox with filled data

Full response (arvdir=older)

{
    "batchcomplete": "",
    "continue": {
        "arvcontinue": "20200306164040|1130467581",
        "continue": "-||"
    },
    "query": {
        "pages": {
            "-1": {
                "ns": 0,
                "title": "Kevin Kratz",
                "missing": ""
            }
        },
        "allrevisions": [
            {
                "pageid": 86050197,
                "revisions": [
                    {
                        "revid": 1130467582,
                        "parentid": 1130467581,
                        "user": "KrBot",
                        "timestamp": "2020-03-06T16:40:41Z",
                        "comment": "/* wbsetdescription-add:1|es */ categoría de Wikimedia"
                    }
                ],
                "ns": 0,
                "title": "Q86805230"
            }
        ]
    }
}

来源：https://stackoverflow.com/questions/60567772/get-wikidata-first-and-last-revision-timestamp