如何在使用spring数据mongodb聚合框架的组操作中使用Criteria.ne？

Question

I am trying to use spring data mongodb's Criteria.ne operation in a Group Operation but haven't got it right so far. This portion lacks an example in spring data documentation. Can anyone provide me with an example on how I can do it? This is how I am trying to do it:

Criteria criteria = new Criteria();
criteria = criteria.ne(new String[] {"$someKey", "$someotherkey"});
Field field = Fields.field("comparison", criteria.toString());
fields = fields.and(field);
AggregationOperation group = Aggregation.group(fields);

Not sure what I am doing wrong. I am using Spring Data MongoDB 1.3.2.SNAPSHOT

Answer 1

If you are using group you can use this sintax with a mongoTemplate.

mongoTemplate.group(Criteria.where("comparison").ne("value"), "collectionName", GroupBy.key("key1","key2").initialDocument("{}").reduceFunction(" function(obj, prev) {}"), AnyClass.class);

that is the same for :

db.consorcio_consorcio.group({
    "key": {
        "key1": true,
        "key2": true
    },
    "initial": {},
    "reduce": function(obj, prev) {},
    "cond": {
        "comparison": "value"
    }
});

Addionality you can use this webpage for translate query , i think that is helpfully http://www.querymongo.com/