I can request the favorite questions of a user via the users/{id}/favorites endpoint. If I'm only requesting the favorites for one user, then I know that all of the returned questions are the favorites of that one user.
But if I request the favorites of multiple users (using a vectorized {id}), there's no way to know which of the returned questions "belong" to which user.
I propose adding a new field in the results of the returned question that simply has an array of user ids.
In other words, if I request http://api.stackoverflow.com/1.1/users/115730;75245/favorites, I should get back:
{
"total": 197,
"page": 1,
"pagesize": 30,
"questions": [
{
...info on the first question...
"favorited_by": [
115730
]
},
{
...info on the second question...
"favorited_by": [
115730,
75245
]
},
{
...info on the third question...
"favorited_by": [
75245
]
},
... etc ...
]
}
This favorited_by array would only be present when requesting favorited questions, and it would only contain the (relevant) ids of the users specified in the request.
(Added the bug tag since I view this as a serious lack of information)
