Ketakpadanan nilai kunci partition CosmosDB antara dokumen dan pengepala menyebabkan ralat walaupun nilai sepadan

php小编西瓜在介绍CosmosDB时指出，即使值匹配，文档和标头之间的分区键值不匹配也会出现错误。CosmosDB是一种全球分布式数据库服务，它使用分区键将数据分布在不同的物理分区上。分区键是指在写入文档时指定的某个值，它决定了文档将被存储在哪个分区中。如果文档的分区键值与标头中指定的分区键值不匹配，将会导致错误的查询结果或者查询失败。因此，在使用CosmosDB时，我们需要确保文档的分区键值与标头中指定的分区键值保持一致，以避免出现错误。

问题内容

我正在使用 azure-sdk-for-go 包 azcosmos 在 cosmosdb 容器中创建项目。这是我当前收到的错误：

--------------------------------------------------------------------------------
response 400: 400 bad request
error code: badrequest
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{
  "code": "badrequest",
  "message": "message: {\"errors\":[\"partitionkey extracted from document doesn't match the one specified in the header. learn more: https:\\/\\/aka.ms\\/cosmosdb\\/sql\\/errors\\/wrong-pk-value\"]}\r\nactivityid: 9ef3ec05-b381-48c8-bd4e-96a7cb764041, request uri: /apps/d27ef9bf-18ce-4431-b8de-709648aab568/services/2c472c3b-bd86-4593-8539-814c29caac51/partitions/31299a87-b895-4b13-91c0-788756ca5ff3/replicas/132790818155726834p/, requeststats: \r\nrequeststarttime: 2023-02-23t20:53:15.4424439z, requestendtime: 2023-02-23t20:53:15.4424439z,  number of regions attempted:1\r\n{\"systemhistory\":[{\"dateutc\":\"2023-02-23t20:52:06.4715437z\",\"cpu\":1.012,\"memory\":479419988.000,\"threadinfo\":{\"isthreadstarving\":\"false\",\"threadwaitintervalinms\":0.0224,\"availablethreads\":32764,\"minthreads\":52,\"maxthreads\":32767},\"numberofopentcpconnection\":431},{\"dateutc\":\"2023-02-23t20:52:16.4816322z\",\"cpu\":2.342,\"memory\":480026956.000,\"threadinfo\":{\"isthreadstarving\":\"false\",\"threadwaitintervalinms\":0.0193,\"availablethreads\":32761,\"minthreads\":52,\"maxthreads\":32767},\"numberofopentcpconnection\":431},{\"dateutc\":\"2023-02-23t20:52:26.4918299z\",\"cpu\":1.534,\"memory\":480000572.000,\"threadinfo\":{\"isthreadstarving\":\"false\",\"threadwaitintervalinms\":0.0158,\"availablethreads\":32764,\"minthreads\":52,\"maxthreads\":32767},\"numberofopentcpconnection\":437},{\"dateutc\":\"2023-02-23t20:52:36.5019603z\",\"cpu\":1.490,\"memory\":480000576.000,\"threadinfo\":{\"isthreadstarving\":\"false\",\"threadwaitintervalinms\":0.0161,\"availablethreads\":32737,\"minthreads\":52,\"maxthreads\":32767},\"numberofopentcpconnection\":438},{\"dateutc\":\"2023-02-23t20:52:46.5121122z\",\"cpu\":1.306,\"memory\":479989504.000,\"threadinfo\":{\"isthreadstarving\":\"false\",\"threadwaitintervalinms\":0.0204,\"availablethreads\":32762,\"minthreads\":52,\"maxthreads\":32767},\"numberofopentcpconnection\":438},{\"dateutc\":\"2023-02-23t20:53:06.5323276z\",\"cpu\":1.561,\"memory\":479914676.000,\"threadinfo\":{\"isthreadstarving\":\"false\",\"threadwaitintervalinms\":0.0113,\"availablethreads\":32763,\"minthreads\":52,\"maxthreads\":32767},\"numberofopentcpconnection\":424}]}\r\nrequeststart: 2023-02-23t20:53:15.4424439z; responsetime: 2023-02-23t20:53:15.4424439z; storeresult: storephysicaladdress: rntbd://cdb-ms-prod-westus1-fd44.documents.azure.com:14323/apps/d27ef9bf-18ce-4431-b8de-709648aab568/services/2c472c3b-bd86-4593-8539-814c29caac51/partitions/31299a87-b895-4b13-91c0-788756ca5ff3/replicas/132790818155726834p/, lsn: 
9427, globalcommittedlsn: 9427, partitionkeyrangeid: 0, isvalid: true, statuscode: 400, substatuscode: 1001, requestcharge: 1.24, itemlsn: -1, sessiontoken: -1#9427, usinglocallsn: false, transportexception: null, belatencyms: 1.004, activityid: 9ef3ec05-b381-48c8-bd4e-96a7cb764041, retryafterinms: , 
transportrequesttimeline: {\"requesttimeline\":[{\"event\": \"created\", \"starttimeutc\": \"2023-02-23t20:53:15.4424439z\", \"durationinms\": 0.0115},{\"event\": \"channelacquisitionstarted\", \"starttimeutc\": \"2023-02-23t20:53:15.4424554z\", \"durationinms\": 0.0114},{\"event\": \"pipelined\", \"starttimeutc\": \"2023-02-23t20:53:15.4424668z\", \"durationinms\": 0.1556},{\"event\": \"transit time\", \"starttimeutc\": \"2023-02-23t20:53:15.4426224z\", \"durationinms\": 1.8731},{\"event\": \"received\", \"starttimeutc\": \"2023-02-23t20:53:15.4444955z\", \"durationinms\": 0.1408},{\"event\": \"completed\", \"starttimeutc\": \"2023-02-23t20:53:15.4446363z\", \"durationinms\": 0}],\"serviceendpointstats\":{\"inflightrequests\":1,\"openconnections\":1},\"connectionstats\":{\"waitforconnectioninit\":\"false\",\"callspendingreceive\":0,\"lastsendattempt\":\"2023-02-23t20:35:31.6351618z\",\"lastsend\":\"2023-02-23t20:35:31.6351618z\",\"lastreceive\":\"2023-02-23t20:35:31.6351618z\"},\"requestsizeinbytes\":551,\"requestbodysizeinbytes\":26,\"responsemetadatasizeinbytes\":186,\"responsebodysizeinbytes\":166};\r\n resourcetype: document, operationtype: create\r\n, sdk: microsoft.azure.documents.common/2.14.0"
}
--------------------------------------------------------------------------------

我的代码如下：

// load .env
err := godotenv.Load()
handle(err)

// create CosmosDB credentials
endpoint := os.Getenv("AZURE_COSMOS_ENDPOINT")
key := os.Getenv("AZURE_COSMOS_KEY")
cred, err := azcosmos.NewKeyCredential(key)
handle(err)

// create CosmosDB client
client, err := azcosmos.NewClientWithKey(endpoint, cred, nil)
handle(err)
log.Println("CosmosDB client has been successfully created...")

// create Container instance to perform read-write operations
container, err := client.NewContainer("vaporwave", "employees")
handle(err)
log.Println("Container has been successfully created...")

// generate a PartitionKey and example item
pk := azcosmos.NewPartitionKeyString("/_partitionKey")
item := map[string]string{
        "id":   "1",
        "value": "2",
}
marshalled, err := json.Marshal(item)
handle(err)

// create container item
itemResponse, err := container.CreateItem(context.Background(), pk, marshalled, nil)
if err != nil {
    var responseErr *azcore.ResponseError
    errors.As(err, &responseErr)
    log.Fatal(responseErr)
}
log.Printf("Item created. ActivityId %s consuming %v RU\n", itemResponse.ActivityID, itemResponse.RequestCharge)

这遵循 azcosmos 示例测试中创建项目的模式（请参阅examplecontainerclient_createitem 函数）。 azure 门户中容器分区键的屏幕截图。我如何继续收到此错误？看来pk值与我相符，也许我错过了一些东西。

解决方法

您的问题已上线：

pk := azcosmos.newpartitionkeystring("/_partitionkey")

这与其他问题的情况相同：https://www.php.cn/link/e8c1bdc555e17fd06b44ea4d3b4adbda

容器具有分区键定义/路径，该分区键定义/路径是在创建容器期间设置的，它是将包含分区键值的属性的 json 路径。

如果您的路径是 /_partitionkey 那么：

1. 文档正文中应该有一个名为 _partitionkey 的属性
2. 您的代码应为 pk := azcosmos.newpartitionkeystring("<该属性的值")

就您而言，您的主体没有 _partitionkey 属性：

item := map[string]string{
        "id":   "1",
        "value": "2",
}

所以您需要添加它。

或者重新评估 /_partitionkey 是否确实是适合您的容器/用例的正确分区键定义/路径，也许它是不同的。无论是哪一个，“项目”操作都需要值。

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