[英]MongoDB - How to query Embedded Documents from a collection
Gurus - I'm stuck in a situation that I can't figure out how I can query from the following collection " users ", it has 2 embedded documents " signup " and " activity ": 专家-我陷入一种无法解决如何从以下集合“ 用户 ”中查询的情况,它具有2个嵌入式文档“ signup ”和“ activity ”:
{
"appid": 2,
"userid": 404915,
"signup": {
"dt": "2010-12-28",
"platform": 2
},
"activity": {
{
"dt": "2010-12-28",
"platform": 3,
"login_count": 8,
"game_completed": 13
},
{
"dt": "2010-12-30",
"platform": 3,
"login_count": 8,
"game_completed": 13
} ,
{
"dt": "2010-12-31",
"platform": 3,
"login_count": 8,
"game_completed": 13
}
}
},{"appid":2,"userid":404915...}
I need to query: 我需要查询:
unique logins of users who signed up between Date and Date+7 and logged in within Date 在Date和Date + 7之间注册并在Date中登录的用户的唯一登录名
Then: 然后:
Unique logins of users who signed up between Date and Date+7, and logged in between Date+7 and Date+14 在Date和Date + 7之间注册并在Date + 7和Date + 14之间登录的用户的唯一登录名
PLEASE PLEASE Guide me how I can achieve this any example/sample? 请指导我如何实现任何示例/示例? based on this will be really helpful :-) 基于此将非常有帮助:-)
Thanks a lot! 非常感谢!
Here is how you get the result for your first query: 这是您如何获得第一个查询的结果的方法:
var start = new Date(2010, 11, 25);
var end = new Date(2010, 12, 1);
db.users.distinct("userid", {"signup.dt" : {$gte: start, $lte: end},
"activity" : {"$elemMatch" : { dt: {$gte: start, $lte: end}}}});
The second is like it with adding 7 days to the start and end date to the dates after activity. 第二个类似,将开始日期和结束日期增加了7天,之后又增加了活动日期。
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