小编Pie*_*etv的帖子

我正在尝试使用新的部分文档更新功能来修补 Cosmos Db 文档的子对象。但是，我找不到办法做到这一点。

如果文档如下所示，如何使用新的 Patch 方法将 ID 为 2 ProductCode 属性的子项（在 Items 数组中）更新为“A-111”？

{
    "id": "SalesOrder2",
    "ponumber": "PO15428132599",
    "OrderDate": "2005-07-01T00:00:00",
    "DueDate": "2005-07-13T00:00:00",
    "ShippedDate": "2005-07-08T00:00:00",
    "AccountNumber": "Account2",
    "SubTotal": 6107.082,
    "TaxAmt": 586.1203,
    "Freight": 183.1626,
    "TotalDue": 4893.3929,
    "DiscountAmt": 1982.872,
    "Items": [
        {
            "Id": 1,
            "OrderQty": 3,
            "ProductCode": "A-123",
            "ProductName": "Product 1",
            "CurrencySymbol": "$",
            "CurrencyCode": "USD",
            "UnitPrice": 17.1,
            "LineTotal": 5.7
        },
        {
            "Id": 2,
            "OrderQty": 2,
            "ProductCode": "A-456",
            "ProductName": "Product 2",
            "CurrencySymbol": "$",
            "CurrencyCode": "USD",
            "UnitPrice": 10,
            "LineTotal": 20
        }
    ],
    "_rid": "BsMkAMc43s4CAAAAAAAAAA==", …

尝试将新项目添加到父对象的子集合中。例如，在下面的代码中，如何将一个新项目添加到 Items 集合中？

{
    "id": "SalesOrder2",
    "ponumber": "PO15428132599",
    "OrderDate": "2005-07-01T00:00:00",
    "AccountNumber": "Account2",
    "Items": [
        {
            "Id": 1,
            "OrderQty": 3,
            "ProductCode": "A-123",
            "ProductName": "Product 1",
            "CurrencySymbol": "$",
            "CurrencyCode": "USD",
            "UnitPrice": 17.1,
            "LineTotal": 5.7
        },
        {
            "Id": 2,
            "OrderQty": 2,
            "ProductCode": "A-456",
            "ProductName": "Product 2",
            "CurrencySymbol": "$",
            "CurrencyCode": "USD",
            "UnitPrice": 10,
            "LineTotal": 20
        }
    ],
    "_rid": "BsMkAMc43s4CAAAAAAAAAA==",
    "_self": "dbs/BsMkAA==/colls/BsMkAMc43s4=/docs/BsMkAMc43s4CAAAAAAAAAA==/",
    "_etag": "\"00000000-0000-0000-e136-0dbec04601d7\"",
    "_attachments": "attachments/",
    "_ts": 1637760030
}

做这样的事情：

public async Task AddProduct(Item item)
{
        var response = await CosmosDbContainer.PatchItemAsync<Product>(
        id: "a1dc8286-bb5e-4ac0-beb4-f9f1dfc79711",
        partitionKey:new PartitionKey("a1dc8286-bb5e-4ac0-beb4-f9f1dfc79711"), …