eqNotNull

Matches documents where the value of a field equals value.

If value is null, the operator is not added (all documents are matched).

This operator is useful to simplify searches when the criteria is optional. For example, instead of writing:

collection.find {
    User::name {
        if (criteria.name != null)
            eq(criteria.name)
    }
}

this operator can be used instead:

collection.find {
    User::name {
        eqNotNull(criteria.name)
    }
}