MongoDB复杂聚合查询与java中MongoTemplate的api对应

MongoDB聚合json脚本

db.getCollection("202303_refund").aggregate([{"$match": {"courseType": "常规班课","teacherRefundReasonCheck": true,"teacherId": {"$in": [7544]},"createTime": "2023-09-08"}
}, {"$group": {"_id": {"subject": "$subject","schoolAreaId": "$schoolAreaId","grade": "$grade","classId": "$classId","isRefund": "$isRefund","teacherId": "$teacherId"},"subject": {"$first": "$subject"},"schoolAreaId": {"$first": "$schoolAreaId"},"grade": {"$first": "$grade"},"classId": {"$first": "$classId"},"isRefund": {"$first": "$isRefund"},"teacherId": {"$first": "$teacherId"},"refundCount": {"$sum": 1}}
}, {"$project": {"_id": 0,"subject": 1,"schoolAreaId": 1,"grade": 1,"classId": 1,"refundCount": 1,"teacherId": 1,"isRefund": {"$ifNull": ["$isRefund", 0]}}
}])

MongoTemplate的API

Aggregation aggregation = Aggregation.newAggregation(Aggregation.match(new Criteria("courseType").is("常规班课").and("teacherRefundReasonCheck").is(true).and("teacherId").in(Sets.newHashSet(7544)).and("createTime").is("2023-09-08")),Aggregation.group("subject","schoolAreaId","grade","classId","isRefund","teacherId").first("subject").as("subject").first("schoolAreaId").as("schoolAreaId").first("grade").as("grade").first("classId").as("classId").first("isRefund").as("isRefund").first("teacherId").as("teacherId").count().as("refundCount"),Aggregation.project("subject","schoolAreaId","grade","classId","refundCount","teacherId","isRefund"));Iterator<RefundResult> iterator = mongoTemplate.aggregate(aggregation, "202303_refund",RefundResult.class).iterator();