Spring mongo repository slice

Question

I am using spring-sata-mongodb 1.8.2 with MongoRepository and I am trying to use the mongo $slice option to limit a list size when query, but I can\'t find this option in th

Answer 1

Use slice functionality as provided in Java Mongo driver using projection as in below code.

For Example:

List list = new ArrayList();
        // Return the last 10 weeks data only
FindIterable list = db.getDBCollection("COLLECTION").find()
                .projection(Projections.fields(Projections.slice("count", -10)));
MongoCursor doc = list.iterator();
while(doc.hasNext()){
    list.add(new Gson().fromJson(doc.next().toJson(), Entity.class));
}

The above query will fetch all documents of type Entity class and the "field" list of each Entity class document will have only last 10 records.