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Incrementing a date in JavaScript, in order to update MongoDB?
To increment a date, use setDate, getDate() and perform increment operation. Let us first create a collection with documents −
> db.demo168.insertOne({"DueDate":null});
{
"acknowledged" : true,
"insertedId" : ObjectId("5e3695ae9e4f06af551997d6")
}Display all documents from a collection with the help of find() method −
> db.demo168.find();
This will produce the following output −
{ "_id" : ObjectId("5e3695ae9e4f06af551997d6"), "DueDate" : null }Following is the query to increment a date in JavaScript, in order to update MongoDB −
> var t = new Date();
> t.setDate(t.getDate()+1);
1580722089017
>
> var dat = new Date();
> dat .setDate(dat .getDate()+2);
1580808489085
>
> db.demo168.update(
... { "_id": ObjectId("5e3695ae9e4f06af551997d6") },
... {
... "$currentDate": { "DueDate": true },
... "$set": {
... "DueDate1": t,
... "DueDate2": dat
... }
... }
... )
WriteResult({ "nMatched" : 1, "nUpserted" : 0, "nModified" : 1 })Display all documents from a collection with the help of find() method −
> db.demo168.find();
This will produce the following output −
{ "_id" : ObjectId("5e3695ae9e4f06af551997d6"), "DueDate" : ISODate("2020-02-02T09:28:09.308Z"), "DueDate1" : ISODate("2020-02-03T09:28:09.017Z"), "DueDate2" : ISODate("2020-02-04T09:28:09.085Z") }
Updated on: 01-Apr-2020
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