IMongoCollection统计 [英] IMongoCollection stats

问题描述

我正在更新代码以使用MongoDB新的异步API.

I'm updating my code to use MongoDB new async API.

我的用法之一是使用:

return Database.GetCollection("collectionName").GetStats().DataSize

是否有像传统API中的MongoCollection.GetStats()一样从IMongoCollection获取CollectionStatsResult对象的方法? 我现在唯一看到的选择是获取一个Json文档并对其进行解析:

Is there any way to get a CollectionStatsResult object from IMongoCollection like MongoCollection.GetStats() did in the legacy API? The only option I see for now is to get a Json document and parse it :

var jsonCommand = new JsonCommand<BsonDocument>("{collstats : \"collectionName\"}");
var jsonDocument = await Database.RunCommandAsync(jsonCommand);
return Convert.ToInt64(jsonDocument["size"]);

推荐答案

异步API中没有强类型方法.收集统计数据的结果继续改变形状，删除了某些字段，添加了其他字段等.将其保留为强类型并不明智.手动运行它现在所要做的就是正确的方法.

There is not a strongly-type way in the async API. The results of collection stats continue to change shape, removed certain fields, added others, etc... It wasn't prudent to keep this as a strong-type. What you are doing now by running it manually is the correct way to do it.

如果您想要强类型的结果，则可以定义一个简单的类，其中包含您想要的部分并将其传递.

If you'd like a strong-type result, you can define a simple class containing the portions you'd like and pass it along.

[BsonIgnoreExtraElements]
class SizeResult
{
  [BsonElement("size")]
  public long Size { get; set; }
}

var result = await database.RunCommandAsync<SizeResult>("{collstats: 'collectionName'}");

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