When performing an action=parse by pageid on a page with is not a redirect and trying to follow redirects by using redirects=1 a missingparam error is thrown even pageid is given. If the pageid points to a redirect, everything works fine.
Examples:
(1) https://de.wikipedia.org/w/index.php?curid=83614 is a non-redirect page
{
"error": {
"code": "missingparam",
"info": "One of the parameters \"title\" and \"pageid\" is required.",
"*": "See https://de.wikipedia.org/w/api.php for API usage. Subscribe to the mediawiki-api-announce mailing list at <https://lists.wikimedia.org/mailman/listinfo/mediawiki-api-announce> for notice of API deprecations and breaking changes."
},
"servedby": "mw1339"
}- https://de.wikipedia.org/w/api.php?action=parse&format=json&pageid=83614&prop= (same query without redirects=1)
{
"parse": {
"title": "Heiliger Abend",
"pageid": 83614
}
}(2) https://de.wikipedia.org/w/index.php?curid=83615&redirect=no is a redirect page (to 83614)
{
"parse": {
"title": "Heiliger Abend",
"pageid": 83615,
"redirects": [
{
"from": "Heiligabend",
"to": "Heiliger Abend"
}
]
}
}- https://de.wikipedia.org/w/api.php?action=parse&format=json&pageid=83615&prop= (same query without redirects=1)
{
"parse": {
"title": "Heiligabend",
"pageid": 83615
}
}(empty prop= just for demonstration, has no effect on the request's results)