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Conditional upsert (multiple insert) when updating document in MongoDB?
For multiple write operations, use bulkWrite() in MongoDB. Let us create a collection with documents −
> db.demo428.insertOne({ "Name" : "Chris", "Age" : 21 }); { "acknowledged" : true, "insertedId" : ObjectId("5e75f428bbc41e36cc3cae83") } > db.demo428.insertOne({ "Name" : "Chris", "Age" : 23 }); { "acknowledged" : true, "insertedId" : ObjectId("5e75f429bbc41e36cc3cae84") } > db.demo428.insertOne({ "Name" : "David", "Age" : 22 }); { "acknowledged" : true, "insertedId" : ObjectId("5e75f42abbc41e36cc3cae85") } > db.demo428.insertOne({ "Name" : "David", "Age" : 21 }); { "acknowledged" : true, "insertedId" : ObjectId("5e75f42abbc41e36cc3cae86") }
Display all documents from a collection with the help of find() method
> db.demo428.find();
This will produce the following output −
{ "_id" : ObjectId("5e75f428bbc41e36cc3cae83"), "Name" : "Chris", "Age" : 21 } { "_id" : ObjectId("5e75f429bbc41e36cc3cae84"), "Name" : "Chris", "Age" : 23 } { "_id" : ObjectId("5e75f42abbc41e36cc3cae85"), "Name" : "David", "Age" : 22 } { "_id" : ObjectId("5e75f42abbc41e36cc3cae86"), "Name" : "David", "Age" : 21 }
Following is the query for conditional upsert (insert) when updating document in MongoDB −
> db.demo428.bulkWrite( ... [ ... { "updateOne": { ... "filter": { "Name": "David", "Age": 22 }, ... "update": { "$set": { "Info": {Name:"John"} } } ... }}, ... { "insertOne": { ... "document": { "Name": "Carol", "Age": 22, "Info": {Name:"John"}} ... }} ... ], ... { "ordered": false } ... ) { "acknowledged" : true, "deletedCount" : 0, "insertedCount" : 1, "matchedCount" : 1, "upsertedCount" : 0, "insertedIds" : { "1" : ObjectId("5e75f448bbc41e36cc3cae87") }, "upsertedIds" : { } }
Display all documents from a collection with the help of find() method −
> db.demo428.find();
This will produce the following output −
{ "_id" : ObjectId("5e75f428bbc41e36cc3cae83"), "Name" : "Chris", "Age" : 21 } { "_id" : ObjectId("5e75f429bbc41e36cc3cae84"), "Name" : "Chris", "Age" : 23 } { "_id" : ObjectId("5e75f42abbc41e36cc3cae85"), "Name" : "David", "Age" : 22, "Info" : { "Name" : "John" } } { "_id" : ObjectId("5e75f42abbc41e36cc3cae86"), "Name" : "David", "Age" : 21 } { "_id" : ObjectId("5e75f448bbc41e36cc3cae87"), "Name" : "Carol", "Age" : 22, "Info" : { "Name" : "John" } }
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