Add ejson support for mongodb query

[tengattack]

Hi,

I think this PR could help us do some EJSON type & js code for queries like following code:

db.live_statistics.aggregate([
{ '$match': { "time": { '$gte': new Date("$from").valueOf(), '$lt': new Date("$to").valueOf() } } },
{ '$group': { "_id": {
                    $subtract: [ '$time', { $mod: [ '$time', 600000 ] } ]
                }, "sum_online": { '$sum': "$online" }, "time": { '$first': "$time" } } },
{ '$project': {  "name" : "online",  "value" : "$sum_online",  "ts" : { '$add': [ new Date(0), "$_id" ] } } },
{ '$sort' : { "_id": 1 } },
])

[duanjianmin]

this feature is really helpful, hope it can be merged into the the master branch.
by the way , is this repo support pie chart ? I tried but no success

[tengattack]

I will have a try for pie chart later

[duanjianmin]

Thanks for your help please let me know if it works or not. 发自我的 iPhone

…

在 2019年4月3日，19:49，tengattack ***@***.***> 写道： I will have a try for pie chart later — You are receiving this because you commented. Reply to this email directly, view it on GitHub, or mute the thread.

[tengattack]

Yep, it would work by return name field simply (like group by):

For example:

db.userGifts.aggregate([
{ '$match': { "time": { '$gte': new Date("$from"), '$lt': new Date("$to") } } },
{ '$group': { "_id": '$gift_id', "sum_num": { '$sum': "$gift_num" }, "ts": { '$first': '$time' } } },
{ '$project': { "name": "$_id", "value": "$sum_num", "ts": "$ts" } },
{ '$sort': { "value": -1 } },
])

BTW, my name is integer type (so it fails to sort for display), you can give it a reasonable name.

[duanjianmin]

Thanks very much @tengattack , I've tried with pie chart and it is working fine.