Find Documents in MongoDB whose with an array field is a subset of a query array

Question

Suppose I have a insert a set of documents each with an array field. I would like to find all documents such that their array field is a subset of

Answer 1

There is a simple way to do this with aggregation framework or with a find query.

Find query is simple, but you have to use $elemMatch operator:

> db.collection.find({array:{$not:{$elemMatch:{$nin:['a','b','c']}}}}, {_id:0,name:1})

Note that this indicates that we want to not match an array which has an element which is (at the same time) not equal to 'a', 'b' or 'c'. I added a projection which only returns the name field of the resultant document which is optional.