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Find MongoDB documents where all objects in array have specific value?
Let us create a collection with documents −
> db.demo74.insertOne( ... { ... StudentName: "Chris", ... StudentDetails: [{ ... "Subject": "MongoDB", ... "isRegular": "Active" ... },{ ... "Subject": "MongoDB", ... "isRegular": "InActive" ... },{ ... "Subject": "MongoDB", ... "isRegular": "InActive" ... }] ... } ... ); { "acknowledged" : true, "insertedId" : ObjectId("5e29c6b671bf0181ecc4226f") } > db.demo74.insertOne({ ... name: "document2", ... data: [{ ... "Subject": "MongoDB", ... "isRegular": "Active" ... },{ ... "Subject": "MongoDB", ... "isRegular": "Active" ... },{ ... "Subject": "MongoDB", ... "isRegular": "Active" ... }] ... } ... ); { "acknowledged" : true, "insertedId" : ObjectId("5e29c6b771bf0181ecc42270") }
Display all documents from a collection with the help of find() method −
> db.demo74.find();
This will produce the following output −
{ "_id" : ObjectId("5e29c6b671bf0181ecc4226f"), "StudentName" : "Chris", "StudentDetails" : [ { "Subject" : "MongoDB", "isRegular" : "Active" }, { "Subject" : "MongoDB", "isRegular" : "InActive" }, { "Subject" : "MongoDB", "isRegular" : "InActive" } ] } { "_id" : ObjectId("5e29c6b771bf0181ecc42270"), "name" : "document2", "data" : [ { "Subject" : "MongoDB", "isRegular" : "Active" }, { "Subject" : "MongoDB", "isRegular" : "Active" }, { "Subject" : "MongoDB", "isRegular" : "Active" } ] }
Following is the query to find documents where all objects in array have specific value −
> db.demo74.find({ " StudentDetails": { "$not": { "$elemMatch": { "isRegular": { $ne: "Active" } } } }, "StudentDetails.isRegular": "Active" }).pretty();
This will produce the following output −
{ "_id" : ObjectId("5e29c6b671bf0181ecc4226f"), "StudentName" : "Chris", "StudentDetails" : [ { "Subject" : "MongoDB", "isRegular" : "Active" }, { "Subject" : "MongoDB", "isRegular" : "InActive" }, { "Subject" : "MongoDB", "isRegular" : "InActive" } ] }
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