将 mongodb 聚合查询转换为 spring-data-mongodb

Question

是否可以将此 mongo shell 聚合查询转换为 spring-data？

db.getCollection("X").aggregate([
    {
        $group: {
            _id: {
                year: {
                    $year: "$happenedAt"
                },
                month: {
                    $month: "$happenedAt"
                },
                day: {
                    $dayOfMonth: "$happenedAt"
                }
            },
            count: {
                $sum: 1
            }
        }
    }
])

谢谢

Answer 1

Criteria c=new Criteria(Criteria.where("year").is(y).and("month").is(m).and("day").is(d));
Aggregration a=newAggregration(match(c),group("year","month","day").count().as("total"));

就是这样。