Question

我正在寻找从Cosmos Db集合中检索的项目，并且我有一个要检索的ID列表。所有代码都在Azure函数中运行，下面是在列表 filteredResult 中获取所有ID的代码。我正在寻找完成此代码的最佳方法，以一次考虑30-40个ID来从Cosmos Db集合中检索所有项目。

 public static void Run([ServiceBusTrigger("testSB", "SubscriberName", Connection = "AzureServiceBusString")] string mySbMsg,
        [CosmosDB(
    databaseName: "DBName",
    collectionName: "CollectionName",
    ConnectionStringSetting = "CosmosDBConnection")] DocumentClient client,
        ILogger log)
    {
        
        try {
             log.LogInformation($"C# ServiceBus topic trigger function processed message: {mySbMsg}");


            
            var jsonSerializerSettings = new JsonSerializerSettings();
            jsonSerializerSettings.MissingMemberHandling = MissingMemberHandling.Ignore;
            List<MyItem> lists = JsonConvert.DeserializeObject<List<MyItem>>(mySbMsg, jsonSerializerSettings);
            List<string> filteredResult = (from s in lists
                                          where s.DocType == "TEST"
                                 select s.Id).ToList();

        }

Answer 1

该问题最近在Microsoft Q&A forum中得到了介绍。 在此处再次发布答案以扩大覆盖范围。

在创建“ filteredResult”（只需将“ input”列表替换为“ filteredResult”之后）即可使用此代码

 List<string> input = new List<string>();
             input.Add("1");
             input.Add("2");
             input.Add("3");                
              var option = new FeedOptions { EnableCrossPartitionQuery = true };               
              IQueryable<Family> queryable = client.CreateDocumentQuery<Family>(UriFactory.CreateDocumentCollectionUri("families", "items").ToString(), "SELECT * FROM books where books.id IN " + "('" + string.Join( "','", input) + "')",option);
              List<Family> posts = queryable.ToList();
              Console.WriteLine("Read count = {0}", posts.Count);

还要注意，我为文档属性创建了一个模型类，如下所示：

 public class Family
 {
     public int id;
     public string city;
 }

如何从一组ID从Cosmos Db检索一组文档

1 个答案: