I don't seem to be able to get even the most basic date query to work in MongoDB. With a document that looks something like this:
{
"_id" : "foobar/201310",
"ap" : "foobar",
"dt" : ISODate("2013-10-01T00:00:00.000Z"),
"tl" : 375439
}
And a query that looks like this:
{
"dt" : {
"$gte" : {
"$date" : "2013-10-01T00:00:00.000Z"
}
}
}
I get 0 results from executing:
db.mycollection.find({
"dt" : { "$gte" : { "$date" : "2013-10-01T00:00:00.000Z"}}
})
Any idea why this doesn't work?
For reference, this query is being produced by Spring's MongoTemplate so I don't have direct control over the query that is ultimately sent to MongoDB.
(P.S.)
> db.version()
2.4.7
Thanks!
Use the Date() Method in a Query in MongoDB The following code adds a document with the field dateAdded set to the current date if no document with the _id equal to 1 exists in the products collection. Copy var myDateString = Date(); mongosh wraps objects of Date type with the ISODate helper.
You can specify a particular date by passing an ISO-8601 date string with a year within the inclusive range 0 through 9999 to the new Date() constructor or the ISODate() function. These functions accept the following formats: new Date("<YYYY-mm-dd>") returns the ISODate with the specified date.
Comparison Based on Date in MongoDB First, create a collection called 'data' using the document to further understand the concept. Use the find() function to show all the documents in a collection. The following is the date-based return query. Records with a creation date after 2018-05-19T11:10:23Z will be returned.
MongoDB date format dd/mm/yyyy The date field is used to convert a date into a string. Optional, the format field is used for date format specification. Optional, the timezone field is used for the timezone of the operation result.
Although $date
is a part of MongoDB Extended JSON and that's what you get as default with mongoexport
, I don't think you can really use it as a part of the query.
If try exact search with $date
like below:
db.foo.find({dt: {"$date": "2012-01-01T15:00:00.000Z"}})
you'll get the error:
error: { "$err" : "invalid operator: $date", "code" : 10068 }
Try this:
db.mycollection.find({
"dt" : {"$gte": new Date("2013-10-01T00:00:00.000Z")}
})
or (following comments by @user3805045):
db.mycollection.find({
"dt" : {"$gte": ISODate("2013-10-01T00:00:00.000Z")}
})
ISODate
may be also required to compare dates without time (noted by @MattMolnar).
According to Data Types in the mongo Shell both should be equivalent:
The mongo shell provides various methods to return the date, either as a string or as a Date object:
- Date() method which returns the current date as a string.
- new Date() constructor which returns a Date object using the ISODate() wrapper.
- ISODate() constructor which returns a Date object using the ISODate() wrapper.
and using ISODate
should still return a Date object.
{"$date": "ISO-8601 string"}
can be used when strict JSON representation is required. One possible example is Hadoop connector.
From the MongoDB cookbook page comments:
"dt" :
{
"$gte" : ISODate("2014-07-02T00:00:00Z"),
"$lt" : ISODate("2014-07-03T00:00:00Z")
}
This worked for me. In full context, the following command gets every record where the dt
date field has a date on 2013-10-01 (YYYY-MM-DD) Zulu:
db.mycollection.find({ "dt" : { "$gte" : ISODate("2013-10-01T00:00:00Z"), "$lt" : ISODate("2013-10-02T00:00:00Z") }})
Try this:
{ "dt" : { "$gte" : ISODate("2013-10-01") } }
I am using robomongo as the mongodb client gui and the below worked for me
db.collectionName.find({"columnWithDateTime" : {
$lt:new ISODate("2016-02-28T00:00:00.000Z")}})
On the app side I am using nodejs based driver mongodb(v1.4.3),the application uses datepicker in the ui which gives date like YYYY-mm-dd, this is then appended with default time like 00:00:00 and then given to the new Date()
constructor and then supplied to the mongodb criteria object,I think the driver converts the date to ISO date and the query then works and gives desired output, however the same new Date()
constructor does not work or show same output on robo mongo,for the same criteria,which is weird,since I used robomongo to cross check my criteria objects.
Whereas the default cli mongoshell works well with both ISODate
and new Date()
In json strict mode, you'll have to keep the order:
{
"dt": {
"$gte": {
"$date": "2013-10-01T00:00:00.000Z"
}
}
}
Only thing which worked to define my search queries on mlab.com.
this is my document
"_id" : ObjectId("590173023c488e9a48e903d6"),
"updatedAt" : ISODate("2017-04-27T04:26:42.709Z"),
"createdAt" : ISODate("2017-04-27T04:26:42.709Z"),
"flightId" : "590170f97cb84116075e2680",
"_id" : ObjectId("590173023c488e9a48e903d6"),
"updatedAt" : ISODate("2017-04-28T03:26:42.609Z"),
"createdAt" : ISODate("2017-04-28T03:26:42.609Z"),
"flightId" : "590170f97cb84116075e2680",
now i want to find every 27th date document.so i used this....
> db.users.find({createdAt:{"$gte":ISODate("2017-04-27T00:00:00Z"),"$lt":ISODate("2017-04-28T00:00:00Z") }}).count()
result:1
this worked for me.
In the MongoDB shell:
db.getCollection('sensorevents').find({from:{$gt: new ISODate('2015-08-30 16:50:24.481Z')}})
In my nodeJS code ( using Mongoose )
SensorEvent.Model.find( {
from: { $gt: new Date( SensorEventListener.lastSeenSensorFrom ) }
} )
I am querying my sensor events collection to return values where the 'from' field is greater than the given date
Wrap it with new Date()
:
{ "dt" : { "$lt" : new Date("2012-01-01T15:00:00.000Z") } }
Old question, but still first google hit, so i post it here so i find it again more easily...
Using Mongo 4.2 and an aggregate():
db.collection.aggregate(
[
{ $match: { "end_time": { "$gt": ISODate("2020-01-01T00:00:00.000Z") } } },
{ $project: {
"end_day": { $dateFromParts: { 'year' : {$year:"$end_time"}, 'month' : {$month:"$end_time"}, 'day': {$dayOfMonth:"$end_time"}, 'hour' : 0 } }
}},
{$group:{
_id: "$end_day",
"count":{$sum:1},
}}
]
)
This one give you the groupby variable as a date, sometimes better to hande as the components itself.
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