springdata-mongodb中Criteria.Where("XXX").elemMatch(Criteria.where("AAA").is(aaa))和Criteria.Where("XXX.AAA").is(aaa)的不同

1. query.addCriteria(Criteria.where("_id").is(id).and("isDelete").is(0).and("comments").elemMatch(Criteria.where("commentId").is(commentId).and("userId").is(userId)));
她的底层是sql代码是：

db.getCollection("flow_data").find({"_id": ObjectId("61a03858991ba42fe067d8c3"), "isDelete": NumberInt("0"), "comments": {"$elemMatch": {"commentId": "4687d5ac0a5b47f3aad9db281beff12d", "userId": NumberInt("100063")}}})

2. query.addCriteria(Criteria.where("_id").is(id).and("isDelete").is(0).and("comments.commentId").is(commentId).and("comments.userId").is(userId));
她的底层是sql代码是：

db.getCollection("flow_data").find({"_id": ObjectId("61a03858991ba42fe067d8c3"), "comments.commentId": "4687d5ac0a5b47f3aad9db281beff12d", "comments.userId": NumberInt("100063"), "isDelete": NumberInt("0")}

踩坑：一开始是使用的第一种方法去更新红色的那条数，却发现更新了蓝色那条，然后换成第二中方法，就能精准的更新了
{
    "_id": ObjectId("61a03858991ba42fe067d8c3"),
    "flowNo": "1000631637890136",
    中间省略
    "isDelete": NumberInt("0"),
    "comments": [
        {
            "commentId": "c6a0d1b310c0482ea0a0d5658a1c6551",
            "userId": NumberInt("100063"),
            "content": "哈哈",
            "fileUrls": "",
            "time": NumberLong("1637890559"),
            "isRevocation": NumberInt("1"),
            "rvctnTime": NumberLong("1637891868")
        },
        {
            "commentId": "4687d5ac0a5b47f3aad9db281beff12d",
            "userId": NumberInt("100063"),
            "content": "哈哈哈哈哈",
            "fileUrls": "",
            "time": NumberLong("1637891940"),
            "isRevocation": NumberInt("0")
        },
        {
            "commentId": "de63c0fb4c5841d38b1a97fa33ec942f",
            "userId": NumberInt("100063"),
            "content": "哈哈哈哈哈",
            "fileUrls": "",
            "time": NumberLong("1637891974"),
            "isRevocation": NumberInt("0")
        },
        {
            "commentId": "8d55e71a7b5148bfa8657f4fb3ae16b4",
            "userId": NumberInt("100063"),
            "content": "哈哈哈哈",
            "fileUrls": "[{\"fileName\":\"滴滴出行行程报销单-3.pdf\",\"filePath\":\"http://42.192.81.91:8089/u/63/100063/202111/ef79f22987a649378934eaa4c1193662.pdf\",\"fileExt\":\".pdf\",\"fileId\":\"滴滴出行行程报销单-3.pdf0\"}]",
            "time": NumberLong("1637894157"),
            "isRevocation": NumberInt("0")
        }
    ]
}