Mongodb使用C＃驅動程序使用多個字段匹配更新嵌入式文檔

Question

我在mongodb上有一個文檔結構，如下所示：

{
    _id: <string>,
    field1: ...,
    field2: ...,
    field3: ...,
    DeviceVersionPairs: [{ 
            DeviceId: <ObjectId>, 
            CloudFolderId: <ObjectId>, 
            CloudFileId: <ObjectId>, 
            VersionId: <ObjectId>, 
            Status: <int>
        },{ 
            DeviceId: <ObjectId>, 
            CloudFolderId: <ObjectId>, 
            CloudFileId: <ObjectId>, 
            VersionId: <ObjectId>, 
            Status: <int>
        }, 
        ....
    ]
}

我寫這MongoDB的查詢，它的目的是找到具有該行_id比更新其子文檔給出DeviceVersionPairs陣列匹配elemMatch過濾器，它的實際工作;

db.deduplications.update({
    "_id": "...", 
    "DeviceVersionPairs": { "$elemMatch" : {
        "DeviceId": ObjectId("..."), 
        "CloudFolderId": ObjectId("..."), 
        "CloudFileId": ObjectId("..."), 
        "VersionId": ObjectId("...")
    }}
},{
    "$set": { "DeviceVersionPairs.$.Status": 100 }
}, false, false)

但我無法將其轉換為與C＃驅動程序（2.0.1.27）一起使用。 到目前為止，我有這個，但這缺乏elemMatch語句，因此它沒有按預期工作。

var p = DbContext.Deduplications.FindOneAndUpdateAsync(
    filter: Builders<Dal.Deduplication>.Filter.And(
        Builders<Dal.Deduplication>.Filter.Eq("_id", fileHash),
        Builders<Dal.Deduplication>.Filter.Eq("DeviceVersionPairs.DeviceId", deviceId),
        Builders<Dal.Deduplication>.Filter.Eq("DeviceVersionPairs.CloudFolderId", CloudFolderId),
        Builders<Dal.Deduplication>.Filter.Eq("DeviceVersionPairs.CloudFileId", FileId),
        Builders<Dal.Deduplication>.Filter.Eq("DeviceVersionPairs.VersionId", versionIdToBeRemoved)),
    update: Builders<Dal.Deduplication>.Update.Set("DeviceVersionPairs.$.Status", DVPStatus.PassiveOrDeleted)).Result;

使用C＃驅動程序向mongodb發出此類請求的方法是什么？

Answer 1

最后，我想出了自己的解決方案。 使用常規BsonDocument對象創建過濾器完成了這項工作。

var filter = new BsonDocument(new List<BsonElement> {
    new BsonElement("_id", fileHash),
    new BsonElement("DeviceVersionPairs", new BsonDocument("$elemMatch", new BsonDocument(new List<BsonElement> {
        new BsonElement("DeviceId", deviceId),
        new BsonElement("CloudFolderId", cloudFolderId),
        new BsonElement("CloudFileId", cloudFileId),
        new BsonElement("VersionId", versionId)
    })))
});

Answer 2

您是否嘗試匹配陣列中的任何元素？ 如果是這樣，這應該工作：

var p = DbContext.Deduplications.FindOneAndUpdateAsync(
filter: Builders<Dal.Deduplication>.Filter.AnyEq(
    Builders<Dal.Deduplication>.Filter.Eq("_id", fileHash),
    Builders<Dal.Deduplication>.Filter.Eq("DeviceVersionPairs.DeviceId", deviceId),
    Builders<Dal.Deduplication>.Filter.Eq("DeviceVersionPairs.CloudFolderId", CloudFolderId),
    Builders<Dal.Deduplication>.Filter.Eq("DeviceVersionPairs.CloudFileId", FileId),
    Builders<Dal.Deduplication>.Filter.Eq("DeviceVersionPairs.VersionId", versionIdToBeRemoved)),
update: Builders<Dal.Deduplication>.Update.Set("DeviceVersionPairs.$.Status", DVPStatus.PassiveOrDeleted)).Result;