Given the following data set of Event objects:
[
{
"_id": ObjectId("4fda05cb322b1c95b531ac26",
"title": "BUTTON CLICKED",
"createdAt": ISODate("2017-01-12T01:00:00+01:00")
},
{
"_id": ObjectId("1235h1k235h1kl325h1v31gv",
"title": "BUTTON CLICKED",
"createdAt": ISODate("2017-01-14T01:00:00+01:00")
},
{
"_id": ObjectId("c2n890904cn897qnxp23hjk1",
"title": "PAGE VIEWED",
"createdAt": ISODate("2017-01-12T02:00:00+01:00")
}
]How would I group them by date then by name?
The desired result would look like this:
[
{
_id: { year: 2017, month: 1, day: 11 },
events: [ {
title: "BUTTON PRESSED",
count: 3
}, {
title: "PAGE VIEWED",
count: 2
}
]
},
{
_id: { year: 2017, month: 1, day: 24 },
events: [ {
title: "BUTTON PRESSED",
count: 1
}
]
}
]Any help on this issue would be greatly appreciated, so thank you!
you can try this query
db.collectionName.aggregate([
$group: {
_id : {
year : { $year : "$createdAt" },
month : { $month : "$createdAt" },
day : { $dayOfMonth : "$createdAt" },
title: "$title"
},
count:{$sum:1}
}
},
{
$group:{
_id:{
year: "$_id.year",
month: "$_id.month",
day: "$_id.day"
},
data:{
$push: {
name:"$_id.title",
count:"$count"
}
}
}
}
])