Spring MongoDB Criteria To Check Inside A List Or Map

Question

How can I check if a String is inside:

Set<String> obAccountIDs = new HashSet<String>();

in my User model?

Is the in Criteria method the right approach to use?

Spring Mongo Query Doc

Thanks

Answer 1

Or better to use the $nin operator equivalent:

Criteria.where("obAccountIDs").nin(IDs);

Also noting that $not is a "field specific" operator that is actually only applying to the operator expression and producing the negative. You would not be able to use that "across documents". So $nin is the better action in both cases, apart from requiring less typing.

Answer 2

Yes, it is.

Criteria.where("obAccountIDs").not().in(IDs);