使用 C# 和 cosmos 客户端从 cosmos 数据库中删除文档

Question

我是 Cosmos DB 的新手，在阅读了 Microsoft 文档后，我尝试从 Cosmos db 中删除记录。我尝试尽可能地遵循这个例子。正在找到并读取记录，但在尝试删除时遇到未找到错误。

该集合已分区，并且我已经在示例中提到了分区键，但仍然会导致错误。

    private async Task QueryItemsAsync()

    {

        var sqlQueryText = "SELECT * FROM c WHERE c.tenantId = '5c6cb2d77c1c2edc001b9007' and c.id = 'abae8abf-5836-464f-8129-1f0e83a1f639'";

        QueryDefinition queryDefinition = new QueryDefinition(sqlQueryText);

        FeedIterator<Order> queryResultSetIterator = this.container.GetItemQueryIterator<Order>(queryDefinition);

        List<Order> orders = new List<Order>();

        while (queryResultSetIterator.HasMoreResults)

        {

            FeedResponse<Order> currentResultSet = await queryResultSetIterator.ReadNextAsync();

            foreach (Order o in currentResultSet)

            {

                orders.Add(o);

                Console.WriteLine("\tRead {0}\n", o);       

            }

        }

    }         

    private async Task DeleteFamilyItemAsync()

    {

        var partitionKeyValue = "tenantId";

        var orderId = "abae8abf-5836-464f-8129-1f0e83a1f639";

        // Delete an item. Note we must provide the partition key value and id of the item to delete

        ItemResponse<Order> orderResponse = await this.container.DeleteItemAsync<Order>(orderId, new PartitionKey(partitionKeyValue));

        Console.WriteLine("Deleted Family [{0},{1}]\n", partitionKeyValue, orderId);

    }

如下所示，正在读取记录，因此可以找到它，但是当我尝试删除它时，它没有被删除。读取{“Id”：null，“patentId”：null，“orchestrationId”：null，“preOrderId”：“88557ec1-dccb-4397-9ce4-20b6aeb1d636”，“cartId”：“adc463ef-7f38-4fa8-8f37-e505db3a5134”，“confirmationNum”：“QDQ-9 244014-14708","cartConfirmationNum":"IBM-8622967-14079","countryCode":null,"type":"order","cancelDate":null,"id":"abae8abf-5836-464f-8129-1f0e83a1f639"}

发生 NotFound 错误：CosmosRequestException;StatusCode=NotFound;SubStatusCode=0;ActivityId=6dd52d23-68c8-4e6d-b4ff-70cd2a6921cf;RequestCharge=1.24;Message=响应状态代码不表示成功：404 Substatus：0 原因：()。；演示结束，按任意键退出。

Answer 1

问题出在你的partitionKeyValue. 您提供的是分区键定义而不是值。该值是实际的租户 id 而不是文本tenantId。您的删除代码应如下所示：private async Task DeleteFamilyItemAsync(){&nbsp; &nbsp; var partitionKeyValue = "5c6cb2d77c1c2edc001b9007"; // <-- This is the change&nbsp; &nbsp; var orderId = "abae8abf-5836-464f-8129-1f0e83a1f639";&nbsp; &nbsp; // Delete an item. Note we must provide the partition key value and id of the item to delete&nbsp; &nbsp; ItemResponse<Order> orderResponse = await this.container.DeleteItemAsync<Order>(orderId, new PartitionKey(partitionKeyValue));&nbsp; &nbsp; Console.WriteLine("Deleted Family [{0},{1}]\n", partitionKeyValue, orderId);}