C# 将Azure DocumentDB中的MongoDB与.NET驱动程序一起使用会引发MongoCommandException
我正在使用Azure DocumentDB操作MongoDB集合 根据我的Azure标准计划,我有1000 RU/s的限制 当我尝试对MongoDB集合中的一些数据进行筛选和排序时,就会遇到这个问题 下面是我使用.NET MongoDB驱动程序2.4.2.0编写的C#代码:C# 将Azure DocumentDB中的MongoDB与.NET驱动程序一起使用会引发MongoCommandException,c#,mongodb,azure,asp.net-core,azure-cosmosdb,C#,Mongodb,Azure,Asp.net Core,Azure Cosmosdb,我正在使用Azure DocumentDB操作MongoDB集合 根据我的Azure标准计划,我有1000 RU/s的限制 当我尝试对MongoDB集合中的一些数据进行筛选和排序时,就会遇到这个问题 下面是我使用.NET MongoDB驱动程序2.4.2.0编写的C#代码: // GET api/movies [HttpGet] public async Task<IActionResult> Get([RequiredFromQuery] int page,
// GET api/movies
[HttpGet]
public async Task<IActionResult> Get([RequiredFromQuery] int page, [FromQuery] int limit,
[FromQuery] string quality, [FromQuery] int minimumRating, [FromQuery] string queryTerm, [FromQuery] string genre, [FromQuery] string sortBy, [FromQuery] string orderBy)
{
var nbMoviesPerPage = 20;
if (limit >= 20 && limit <= 50)
{
nbMoviesPerPage = limit;
}
var currentPage = 1;
if (page >= 1)
{
currentPage = page;
}
var movies = _mongoDbService.GetCollection(Constants.MoviesCollectionName);
var filter = Builders<MovieBson>.Filter.Empty;
var sort = Builders<MovieBson>.Sort.Descending(movie => movie.DateUploadedUnix);
if (!string.IsNullOrWhiteSpace(quality) &&
(quality == "720p" || quality == "1080p" || quality.ToLower() == "3d"))
{
filter = filter & Builders<MovieBson>.Filter.Eq("torrents.quality", quality);
}
if (minimumRating > 0 && minimumRating < 10)
{
filter = filter & Builders<MovieBson>.Filter.Gt("rating", minimumRating);
}
if (!string.IsNullOrWhiteSpace(queryTerm))
{
filter = filter &
(Builders<MovieBson>.Filter.Regex("imdb_code", new BsonRegularExpression("/^" + queryTerm + "$/i")) |
Builders<MovieBson>.Filter.Regex("title", new BsonRegularExpression("/^" + queryTerm + "$/i")) |
Builders<MovieBson>.Filter.Regex("cast.name", new BsonRegularExpression("/^" + queryTerm + "$/i")) |
Builders<MovieBson>.Filter.Regex("cast.imdb_code", new BsonRegularExpression("/^" + queryTerm + "$/i")));
}
if (!string.IsNullOrWhiteSpace(genre))
{
filter = filter & Builders<MovieBson>.Filter.In("genres", new List<string>
{
genre
});
}
if (!string.IsNullOrWhiteSpace(sortBy))
{
switch (sortBy)
{
case "title":
sort = Builders<MovieBson>.Sort.Ascending(movie => movie.Title);
break;
case "year":
sort = Builders<MovieBson>.Sort.Descending(movie => movie.Year);
break;
case "rating":
sort = Builders<MovieBson>.Sort.Descending(movie => movie.Rating);
break;
case "peers":
sort =
Builders<MovieBson>.Sort.Descending(movie => movie.Torrents.Select(torrent => torrent.Peers));
break;
case "seeds":
sort =
Builders<MovieBson>.Sort.Descending(movie => movie.Torrents.Select(torrent => torrent.Seeds));
break;
case "download_count":
sort = Builders<MovieBson>.Sort.Descending(movie => movie.DownloadCount);
break;
case "like_count":
sort = Builders<MovieBson>.Sort.Descending(movie => movie.LikeCount);
break;
case "date_added":
sort = Builders<MovieBson>.Sort.Descending(movie => movie.DateUploadedUnix);
break;
default:
sort = Builders<MovieBson>.Sort.Descending(movie => movie.DateUploadedUnix);
break;
}
}
var filteredMovies = movies.Find(filter);
var totalTask = filteredMovies.CountAsync();
var moviesTask = filteredMovies.Skip((currentPage - 1) * nbMoviesPerPage).Limit(nbMoviesPerPage).Sort(sort).ToListAsync();
await Task.WhenAll(totalTask, moviesTask);
if (!string.IsNullOrWhiteSpace(orderBy))
{
switch (orderBy)
{
case "desc":
moviesTask.Result.Reverse();
break;
}
}
return
Json(new MovieResponse
{
TotalMovies = totalTask.Result,
Movies = JsonConvert.DeserializeObject<IEnumerable<MovieJson>>(moviesTask.Result.ToJson())
});
}
//获取api/电影
[HttpGet]
公共异步任务获取([RequiredFromQuery]int页,[FromQuery]int限制,
[FromQuery]字符串质量,[FromQuery]int minimumRating,[FromQuery]字符串查询项,[FromQuery]字符串类型,[FromQuery]字符串排序依据,[FromQuery]字符串排序依据)
{
var nbMoviesPerPage=20;
如果(限制>=20&&limit=1)
{
当前页面=第页;
}
var movies=\u mongoDbService.GetCollection(Constants.moviescolectionname);
var filter=Builders.filter.Empty;
var sort=Builders.sort.Descending(movie=>movie.DateUploadedUnix);
if(!string.IsNullOrWhiteSpace(质量)&&
(quality==“720p”| | quality==“1080p”| | quality.ToLower()==“3d”))
{
filter=filter&Builders.filter.Eq(“torrents.quality”,quality);
}
如果(最小额定值>0和最小额定值<10)
{
过滤器=过滤器&Builders.filter.Gt(“额定值”,最小额定值);
}
如果(!string.IsNullOrWhiteSpace(queryTerm))
{
过滤器=过滤器&
(Builders.Filter.Regex(“imdb_代码”,新的BsonRegularExpression(“/^”+queryTerm+“$/i”))|
Builders.Filter.Regex(“title”,新的BsonRegularExpression(“/^”+queryTerm+“$/i”))|
Builders.Filter.Regex(“cast.name”,新的BsonRegularExpression(“/^”+queryTerm+“$/i”))|
Builders.Filter.Regex(“cast.imdb_code”,新的BsonRegularExpression(“/^”+queryTerm+“$/i”);
}
如果(!string.IsNullOrWhiteSpace(类型))
{
filter=filter&Builders.filter.In(“流派”,新列表)
{
体裁
});
}
如果(!string.IsNullOrWhiteSpace(sortBy))
{
开关(sortBy)
{
案例“标题”:
sort=Builders.sort.升序(movie=>movie.Title);
打破
案件“年份”:
sort=Builders.sort.Descending(movie=>movie.Year);
打破
案例“评级”:
sort=Builders.sort.Descending(movie=>movie.Rating);
打破
案例“同行”:
分类=
Builders.Sort.Descending(movie=>movie.Torrents.Select(torrent=>torrent.Peers));
打破
案例“种子”:
分类=
Builders.Sort.Descending(movie=>movie.Torrents.Select(torrent=>torrent.Seeds));
打破
案例“下载计数”:
sort=Builders.sort.Descending(movie=>movie.DownloadCount);
打破
案例“类似计数”:
sort=Builders.sort.Descending(movie=>movie.LikeCount);
打破
案例“添加日期”:
sort=Builders.sort.Descending(movie=>movie.DateUploadedUnix);
打破
违约:
sort=Builders.sort.Descending(movie=>movie.DateUploadedUnix);
打破
}
}
var filteredMovies=movies.Find(过滤器);
var totalTask=filteredMovies.CountAsync();
var moviesTask=filteredMovies.Skip((当前页-1)*nbMoviesPerPage.Limit(nbMoviesPerPage.Sort(Sort).toListSync();
等待任务。WhenAll(总任务、电影任务);
如果(!string.IsNullOrWhiteSpace(orderBy))
{
交换机(订购方)
{
案例“desc”:
moviesTask.Result.Reverse();
打破
}
}
返回
Json(新电影响应)
{
TotalMovies=totalTask.Result,
Movies=JsonConvert.DeserializeObject(moviesTask.Result.ToJson())
});
}
当我使用routeapi/movies?page=1&queryTerm=TitaniC调用控制器时,MongoDB命令输出为:
{查找({“$或”:[{“imdb_代码”:/^TitaniC$/i},{“标题”:/^TitaniC$/i},{“cast.name”:/^TitaniC$/i},{“cast.imdb_代码”:/^TitaniC$/i})。排序({“上载日期”\uUnix:-1})。跳过(0)。限制(20)}
这看起来很好,可以检索适当的文档
但很随机地,我从Azure收到一个429 HTTP错误,告诉我:
'命令查找失败:消息:{“错误”:[“请求速率很大”]}
但是,我只调用了一次API,没有其他请求…为什么会发生这种情况;-当MongoDB无法使用索引获取查询的排序顺序时,它会在内存中对结果进行排序。如果排序操作消耗超过32兆字节,则抛出上述错误。解决此问题的一种可能方法是使用allowDiskUse选项启用聚合管道阶段将数据写入临时文件。结帐
您是否查看了返回标题以了解查询的成本?如果你在1秒内燃烧超过1000RU,你会被节流。但除非您查看您的查询/查询的RU成本,否则真的没有办法知道。我将查看RU,但我刚刚查看了Azure portal中的限制请求图表,没有显示如下所示:
var data = await movies.Aggregate(new AggregateOptions
{
AllowDiskUse = true,
})
.Match({})//Insert your query here
.Skip(2)
.Sort({ "_id", -1 } )//Insert your sort options here
.Limit(20)
.ToListAsync();