@Autowired MongoDatabase database; @Override public List
    
      getAdditionalGrid(String collection, int cityDataId) {
      MongoCollection
     
       gridColl = database.getCollection("grid");         FindIterable
      
        grids = gridColl.find(Filters.eq("cityDataId", cityDataId))                 .projection(new BasicDBObject().append("grid_id", true).append("_id",true));         }     }