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“Toggle” query in MongoDB?
You need to find the document and after that you need to use update to toggle query. Let us first create a collection with documents −
> db.toggleDemo.insertOne({"CustomerName":"John Smith","CustomerAge":28,"isMarried":true}); { "acknowledged" : true, "insertedId" : ObjectId("5cc7be138f9e6ff3eb0ce43b") } > db.toggleDemo.insertOne({"CustomerName":"David Miller","CustomerAge":25,"isMarried":false}); { "acknowledged" : true, "insertedId" : ObjectId("5cc7be2e8f9e6ff3eb0ce43c") }
Following is the query to display all documents from a collection with the help of find() method −
> db.toggleDemo.find().pretty();
This will produce the following output −
{
"_id" : ObjectId("5cc7be138f9e6ff3eb0ce43b"),
"CustomerName" : "John Smith",
"CustomerAge" : 28,
"isMarried" : true
}
{
"_id" : ObjectId("5cc7be2e8f9e6ff3eb0ce43c"),
"CustomerName" : "David Miller",
"CustomerAge" : 25,
"isMarried" : false
}Toggle query in MongoDB −
> var value = db.toggleDemo.findOne({CustomerName:"David Miller"}); > db.toggleDemo.update({CustomerName:"David Miller"}, {$set: {isMarried: !value.isMarried}}); WriteResult({ "nMatched" : 1, "nUpserted" : 0, "nModified" : 1 })
Let us check the document with isMarried:false has been toggled with value true. We will now display all documents from the collection −
> db.toggleDemo.find().pretty();
This will produce the following output −
{
"_id" : ObjectId("5cc7be138f9e6ff3eb0ce43b"),
"CustomerName" : "John Smith",
"CustomerAge" : 28,
"isMarried" : true
}
{
"_id" : ObjectId("5cc7be2e8f9e6ff3eb0ce43c"),
"CustomerName" : "David Miller",
"CustomerAge" : 25,
"isMarried" : true
}
Updated on: 30-Jul-2019
280 Views
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