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Convert date parts to date in MongoDB
Let us first create a collection with documents −
> db.demo386.insert( ... { ... details: { Month: 02, Day: 27, Year: 2020 } ... } ... ); WriteResult({ "nInserted" : 1 })
Display all documents from a collection with the help of find() method −
> db.demo386.find();
This will produce the following output −
{ "_id" : ObjectId("5e5bd9a222064be7ab44e7f7"), "details" : { "Month" : 2, "Day" : 27, "Year" : 2020 } }
Following is the query to convert date parts to date −
> db.demo386.aggregate( ... {"$project":{ ... "_id":0, ... "DueDate":{ ... "$dateToString":{ ... "format":"%m-%d-%Y", ... "date":{"$dateFromParts": {"year":"$details.Year","month":"$details.Month","day":"$details.Day"}} ... } ... } ... }} ... );
This will produce the following output −
{ "DueDate" : "02-27-2020" }
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