以下是帖子集合中的2个帖子对象。我想通过回答或投票或问题本身找到所有涉及的用户。 posttype确定它是一个问题还是一个答案：
对于Q ，posttype = 1
发布类型= 2表示ans
/* 7 */
{
"_id" : 121.0,
"posttypeID" : 1.0,
"tags" : [
"science",
"technology",
"math"
],
"viewCount" : 10.0,
"votes" : [
{
"_id" : 1201.0,
"user" : 124.0
},
{
"_id" : 12011.0,
"user" : 1241.0
},
{
"_id" : 12012.0,
"user" : 1241.0
}
],
"answers" : [
{
"_id" : 121.0,
"posttypeID" : 2.0,
"tags" : [
"science",
"technology",
"math"
],
"viewCount" : 10.0,
"votes" : [
{
"_id" : 1201.0,
"user" : 124.0
},
{
"_id" : 1201.0,
"user" : 124.0
},
{
"_id" : 1201.0,
"user" : 124.0
}
]
},
{
"_id" : 122.0,
"posttypeID" : 2.0,
"tags" : [
"science",
"technology",
"math"
],
"viewCount" : 10.0,
"votes" : [
{
"_id" : 1201.0,
"user" : 124.0
},
{
"_id" : 1201.0,
"user" : 124.0
},
{
"_id" : 1201.0,
"user" : 124.0
}
]
},
{
"_id" : 121.0,
"posttypeID" : 2.0,
"tags" : [
"science",
"technology",
"math"
],
"viewCount" : 10.0,
"votes" : [
{
"_id" : 1201.0,
"user" : 124.0
},
{
"_id" : 1201.0,
"user" : 124.0
},
{
"_id" : 1201.0,
"user" : 124.0
}
]
}
]
}
/* 8 */
{
"_id" : 11.0,
"posttypeID" : 1.0,
"tags" : [
"social",
"technology",
"arts"
],
"viewCount" : 20.0,
"votes" : [
{
"_id" : 1.0,
"user" : 122.0
},
{
"_id" : 2.0,
"user" : 123.0
},
{
"_id" : 12012.0,
"user" : 1241.0
}
],
"answers" : [
{
"_id" : 12.0,
"posttypeID" : 2.0,
"tags" : [
"social",
"arts",
"math"
],
"viewCount" : 10.0,
"votes" : [
{
"_id" : 3.0,
"user" : 124.0
},
{
"_id" : 14.0,
"user" : 124.0
},
{
"_id" : 15.0,
"user" : 123.0
}
]
},
{
"_id" : 50.0,
"posttypeID" : 2.0,
"tags" : [
"science",
"usa",
"arts"
],
"viewCount" : 50.0,
"votes" : [
{
"_id" : 1202.0,
"user" : 120.0
},
{
"_id" : 1203.0,
"user" : 121.0
},
{
"_id" : 1204.0,
"user" : 124.0
}
]
},
{
"_id" : 60.0,
"posttypeID" : 2.0,
"tags" : [
"science",
"technology",
"math"
],
"viewCount" : 5.0,
"votes" : [
{
"_id" : 1205.0,
"user" : 121.0
},
{
"_id" : 1206.0,
"user" : 123.0
},
{
"_id" : 1207.0,
"user" : 122.0
}
]
}
]
}
/* 9 */
{
"_id" : 115.0,
"posttypeID" : 1.0,
"tags" : [
"social",
"technology",
"arts"
],
"viewCount" : 5.0,
"votes" : [
{
"_id" : 1208.0,
"user" : 122.0
},
{
"_id" : 1209.0,
"user" : 120.0
}
],
"answers" : [
{
"_id" : 21.0,
"posttypeID" : 2.0,
"tags" : [
"social",
"arts",
"usa"
],
"viewCount" : 2.0,
"votes" : {}
},
{
"_id" : 110.0,
"posttypeID" : 2.0,
"tags" : [
"wiki",
"usa",
"arts"
],
"viewCount" : 0.0,
"votes" : [
{
"_id" : 1210.0,
"user" : 124.0
}
]
},
{
"_id" : 100.0,
"posttypeID" : 2.0,
"tags" : [
"usa",
"wiki"
],
"viewCount" : 5.0,
"votes" : [
{
"_id" : 1211.0,
"user" : 125.0
}
]
}
]
}
以下是用户集合
/ * 1 * / { ＆＃34; _id＆＃34; ：124.0， ＆＃34; CreationDate＆＃34; ：＆＃34; 2013-05-08T18：26：05.680＆＃34;， ＆＃34; DisplayName的＆＃34; ：＆＃34; hairboat＆＃34;， ＆＃34;年龄＆＃34; ：23.0， ＆＃34;给予好评＆＃34; ：1.0， ＆＃34; DownVote＆＃34; ：0.0 }
/ * 2 * / { ＆＃34; _id＆＃34; ：1241.0， ＆＃34; CreationDate＆＃34; ：＆＃34; 2013-05-08T18：26：05.680＆＃34;， ＆＃34; DisplayName的＆＃34; ：＆＃34; jamie＆＃34;， ＆＃34;年龄＆＃34; ：40.0， ＆＃34;给予好评＆＃34; ：10.0， ＆＃34; DownVote＆＃34; ：5.0 }
/ * 3 * / { ＆＃34; _id＆＃34; ：120.0， ＆＃34; CreationDate＆＃34; ：＆＃34; 2013-05-08T18：26：05.680＆＃34;， ＆＃34; DisplayName的＆＃34; ：＆＃34; jamie＆＃34;， ＆＃34;年龄＆＃34; ：40.0， ＆＃34;给予好评＆＃34; ：10.0， ＆＃34; DownVote＆＃34; ：5.0 }
/ * 4 * / { ＆＃34; _id＆＃34; ：121.0， ＆＃34; CreationDate＆＃34; ：＆＃34; 2013-05-08T19：01：56.490＆＃34;， ＆＃34; DisplayName的＆＃34; ：＆＃34;凯西＆＃34;， ＆＃34;年龄＆＃34; ：30.0， ＆＃34;给予好评＆＃34; ：120.0， ＆＃34; DownVote＆＃34; ：10.0 }
/ * 5 * / { ＆＃34; _id＆＃34; ：122.0， ＆＃34; CreationDate＆＃34; ：＆＃34; 2013-05-08T19：03：27.963＆＃34;， ＆＃34; DisplayName的＆＃34; ：＆＃34; user15＆＃34;， ＆＃34;年龄＆＃34; ：30.0， ＆＃34;给予好评＆＃34; ：1.0， ＆＃34; DownVote＆＃34; ：0.0 }
/ * 6 * / { ＆＃34; _id＆＃34; ：123.0， ＆＃34; CreationDate＆＃34; ：＆＃34; 2013-05-08T19：03：27.963＆＃34;， ＆＃34; DisplayName的＆＃34; ：＆＃34; user15＆＃34;， ＆＃34;年龄＆＃34; ：30.0， ＆＃34;给予好评＆＃34; ：1.0， ＆＃34; DownVote＆＃34; ：0.0 }
/ * 7 * / { ＆＃34; _id＆＃34; ：12.0， ＆＃34; CreationDate＆＃34; ：＆＃34; 2013-05-08T19：03：27.963＆＃34;， ＆＃34; DisplayName的＆＃34; ：＆＃34; user15＆＃34;， ＆＃34;年龄＆＃34; ：30.0， ＆＃34;给予好评＆＃34; ：1.0， ＆＃34; DownVote＆＃34; ：0.0 }