Syntax error Matching an array field that contains any combination of the provided array in MongoDB?

Matching an array field that contains any combination of the provided array in MongoDB?

Use $nin operator along with $elemMatch and $not for this. To understand the concept, let us create a collection with the document. The query to create a collection with a document is as follows −

> db.combinationOfArrayDemo.insertOne({"StudentName":"Larry","StudentAge":21,"StudentFavouriteTechnicalSubject":["C","Java"]});
{
   "acknowledged" : true,
   "insertedId" : ObjectId("5c7f77cc8d10a061296a3c58")
}
> db.combinationOfArrayDemo.insertOne({"StudentName":"Mike","StudentAge":23,"StudentFavouriteTechnicalSubject":["C++","Java"]});
{
   "acknowledged" : true,
   "insertedId" : ObjectId("5c7f77dc8d10a061296a3c59")
}
> db.combinationOfArrayDemo.insertOne({"StudentName":"David","StudentAge":22,"StudentFavouriteTechnicalSubject":["Java"]});
{
   "acknowledged" : true,
   "insertedId" : ObjectId("5c7f77f48d10a061296a3c5a")
}

Display all documents from a collection with the help of find() method. The query is as follows −

> db.combinationOfArrayDemo.find().pretty();

The following is the output −

{
   "_id" : ObjectId("5c7f77cc8d10a061296a3c58"),
   "StudentName" : "Larry",
   "StudentAge" : 21,
   "StudentFavouriteTechnicalSubject" : [
      "C",
      "Java"
   ]
}
{
   "_id" : ObjectId("5c7f77dc8d10a061296a3c59"),
   "StudentName" : "Mike",
   "StudentAge" : 23,
   "StudentFavouriteTechnicalSubject" : [
      "C++",
      "Java"
   ]
}
{
   "_id" : ObjectId("5c7f77f48d10a061296a3c5a"),
   "StudentName" : "David",
   "StudentAge" : 22,
   "StudentFavouriteTechnicalSubject" : [
      "Java"
   ]
}

Here is the query for matching an array field that contains any combination of the provided array in MongoDB −

> db.combinationOfArrayDemo.find({StudentFavouriteTechnicalSubject: {$not: {$elemMatch:
{$nin: ['C++', 'Java']}}}}).pretty();

The following is the output −

{
   "_id" : ObjectId("5c7f77dc8d10a061296a3c59"),
   "StudentName" : "Mike",
   "StudentAge" : 23,
   "StudentFavouriteTechnicalSubject" : [
      "C++",
      "Java"
   ]
}
{
   "_id" : ObjectId("5c7f77f48d10a061296a3c5a"),
   "StudentName" : "David",
   "StudentAge" : 22,
   "StudentFavouriteTechnicalSubject" : [
      "Java"
   ]
}
Updated on: 2019-07-30T22:30:25+05:30

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