Azure 不支持 Cosmos DB 查詢

Question

我創建了一個 Azure Function（HTTP 觸發），它使用 Linq 對 Cosmos DB 運行空間查詢。它返回幾何多邊形邊界內的岩石元素。

運行它時，出現以下錯誤：

Exception while executing function: example 發生一個或多個錯誤。 (Method 'Within' is not supported., Windows/10.0.14393 documentdb.netcore-sdk/2.11.6) Method 'Within' is not supported., Windows/10.0.14393 documentdb.netcore-sdk/2.11.6

我檢查過我使用的是所有最新的 NuGet 庫版本。 有人可以提示我還有什么要檢查的嗎？ 這是代碼：

public static class Example
{
    [FunctionName("example")]
    public static async Task<IActionResult> Run(
        [HttpTrigger(AuthorizationLevel.Function, "post", Route = "example")] HttpRequest req,
        [CosmosDB(
            databaseName: "a",
            collectionName: "b",
            ConnectionStringSetting = "CosmosDBConnection")]
            DocumentClient client,
            ILogger log)
        {
            log.LogInformation($"GetRockLocationsSpatial for coordinates");
            Uri collectionUri = UriFactory.CreateDocumentCollectionUri("a", "b");
            Polygon rectangularArea = new Polygon(
                new[]
                {
                    new LinearRing(new [] {
                        new Position(100, 50),
                        new Position(130, 50),
                        new Position(130, 40),
                        new Position(100, 40),
                        new Position(100, 50)
                    })
                });
            var rocks =client.CreateDocumentQuery<RockLocationDocument>(collectionUri).Where(a => a.location.Within(rectangularArea)).AsEnumerable();

            foreach (RockLocationDocument rock in rocks)
            {
                Console.WriteLine("\t" + rock);
            }

            return new OkObjectResult(JsonConvert.SerializeObject(rocks));
        }
    }
}

Answer 1

我不確定是什么原因導致您的錯誤。 但是我可以用你的代碼得到結果。 你可以按照這個試試。

RockLocationDocument.cs

using Microsoft.Azure.Documents.Spatial;

namespace example
{
    public class RockLocationDocument
    {

        public string id { get; set; }

        public Point location { get; set; }
    }
}

函數.cs

我在CreateDocumentQuery方法中傳遞了 FeedOption。

using System;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Azure.WebJobs;
using Microsoft.Azure.WebJobs.Extensions.Http;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.Logging;
using Newtonsoft.Json;
using Microsoft.Azure.Documents.Client;
using Microsoft.Azure.Documents.Spatial;
using System.Linq;

namespace example
{
    public static class Example
{
    [FunctionName("example")]
    public static async Task<IActionResult> Run(
        [HttpTrigger(AuthorizationLevel.Function, "post", Route = "example")] HttpRequest req,
        [CosmosDB(
            databaseName: "Test",
            collectionName: "site",
            ConnectionStringSetting = "sogo_DOCUMENTDB")]
            DocumentClient client,
            ILogger log)
        {
            log.LogInformation($"GetRockLocationsSpatial for coordinates");
            Uri collectionUri = UriFactory.CreateDocumentCollectionUri("Test", "site");
            Polygon rectangularArea = new Polygon(
                new[]
                {
                    new LinearRing(new [] {
                        new Position(100, 50),
                        new Position(130, 50),
                        new Position(130, 40),
                        new Position(100, 40),
                        new Position(100, 50)
                    })
                });

            var rocks =client.CreateDocumentQuery<RockLocationDocument>(collectionUri,new FeedOptions { EnableCrossPartitionQuery = true }).Where(a => a.location.Within(rectangularArea)).AsEnumerable();

            foreach (RockLocationDocument rock in rocks)
            {
                Console.WriteLine("\t" + JsonConvert.SerializeObject(rock));
            }

            return new OkObjectResult(JsonConvert.SerializeObject(rocks));
        }
    }
}

圖書館：

使用postman測試：

希望這可以幫到你。