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MongoDB query to get specific list of names from documents where the value of a field is an array
For this, use $all. The $all operator selects the documents where the value of a field is an array that contains all the specified elements. Let us create a collection with documents −
> db.demo642.insertOne( ... { ... _id:1, ... ListOfNames:["Robert","John"] ... } ... ); { "acknowledged" : true, "insertedId" : 1 } > db.demo642.insertOne( { _id:2, ListOfNames:["Robert","Chris"] } ); { "acknowledged" : true, "insertedId" : 2 }
Display all documents from a collection with the help of find() method −
> db.demo642.find();
This will produce the following output −
{ "_id" : 1, "ListOfNames" : [ "Robert", "John" ] } { "_id" : 2, "ListOfNames" : [ "Robert", "Chris" ] }
Following is the query to get specific list of names from documents where the value of a field is an array −
> db.demo642.find({ListOfNames: { ... $all: [ "Chris", "Robert" ] ... }})
This will produce the following output −
{ "_id" : 2, "ListOfNames" : [ "Robert", "Chris" ] }
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