{"id":50553,"date":"2023-07-21T13:33:55","date_gmt":"2023-11-08T17:11:17","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8python%e6%93%8d%e4%bd%9cazure-cosmos-db%e7%9a%84%e6%95%b0%e6%8d%ae%e3%80%82\/"},"modified":"2024-04-30T14:40:28","modified_gmt":"2024-04-30T06:40:28","slug":"%e4%bd%bf%e7%94%a8python%e6%93%8d%e4%bd%9cazure-cosmos-db%e7%9a%84%e6%95%b0%e6%8d%ae%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8python%e6%93%8d%e4%bd%9cazure-cosmos-db%e7%9a%84%e6%95%b0%e6%8d%ae%e3%80%82\/","title":{"rendered":"\u4f7f\u7528Python\u64cd\u4f5cAzure Cosmos DB\u7684\u6570\u636e"},"content":{"rendered":"

\u9996\u5148<\/h2>\n

\u7531\u4e8e\u6211\u5728Python\u4e2d\u68c0\u67e5\u4e86\u5173\u4e8eAzure Cosmos DB\u7684\u6570\u636e\u64cd\u4f5c\uff0c\u6211\u60f3\u628a\u5b83\u4eec\u6574\u7406\u5728\u5907\u5fd8\u5f55\u4e2d\u3002(\u867d\u7136\u5f00\u59cb\u603b\u662f\u4e00\u6837\u7684\u63aa\u8f9e…)<\/p>\n

\u6700\u8fd1\u6211\u6d89\u8db3\u4e86\u65e0\u670d\u52a1\u5668\u67b6\u6784(AWS AppSync+Lambda+DynamoDB)\uff0c\u7136\u540e\u6211\u5c31\u597d\u5947\u5982\u679c\u7528Azure\u7684\u8bdd\u4f1a\u662f\u600e\u6837\u7684\u60c5\u51b5\uff0c\u6240\u4ee5\u6211\u8fdb\u884c\u4e86\u4e00\u756a\u8c03\u67e5\u3002
\n\u5728Azure\u5b9e\u73b0\u65e0\u670d\u52a1\u5668\u67b6\u6784\u7684\u8bdd\uff0c\u6211\u8ba4\u4e3a\u9700\u8981\u4e24\u4e2a\u7ec4\u4ef6\uff1aAzure Functions(HttpTrigger\/Graphene)\u548cCosmosDB\u3002<\/p>\n

\u6211\u5011\u9996\u5148\u5e0c\u671b\u5be6\u73fe\u6709\u95dc Azure CosmosDB \u7684\u6578\u64da\u64cd\u4f5c\u3002<\/p>\n

\u5173\u4e8eAzure CosmosDB\uff0c\u5b98\u65b9\u6587\u6863\u63d0\u4f9b\u4e86\u5173\u4e8e\u6982\u8ff0\u548c\u8be6\u7ec6\u4fe1\u606f\u7684\u4e30\u5bcc\u5185\u5bb9\u3002\u6b64\u5916\uff0c\u5173\u4e8e\u4f7f\u7528Azure Cosmos DB: Azure Cosmos DB SQL API\u521b\u5efaPython\u5e94\u7528\u7a0b\u5e8f\u7684\u5b98\u65b9\u6587\u6863\u63d0\u4f9b\u4e86\u8bbe\u7f6e\u3001\u5b9e\u65bd\u65b9\u6cd5\u548c\u6559\u7a0b\uff0c\u5efa\u8bae\u53c2\u8003\u6b64\u6587\u6863\u4ee5\u52a0\u6df1\u7406\u89e3\u3002<\/p>\n

\u521b\u5efaAzure Cosmos DB\u8d26\u6237<\/h2>\n

\u4e3a\u4e86\u4f7f\u7528Azure Cosmos DB\uff0c\u9996\u5148\u9700\u8981\u521b\u5efa\u4e00\u4e2aAzure Cosmos DB\u5e10\u6237\u3002
\nAzure Cosmos DB\u5e10\u6237\u7c7b\u4f3c\u4e8e\u4e00\u4e2aDB\u96c6\u7fa4\uff0c\u60a8\u53ef\u4ee5\u5728\u5e10\u6237\u4e0b\u521b\u5efa\u591a\u4e2a\u6570\u636e\u5e93\u548c\u591a\u4e2a\u5bb9\u5668\uff08\u8868\uff09\u3002
\n\u8fd8\u6709\u4e00\u4e9b\u8fde\u63a5\u4fe1\u606f\uff0c\u5982\u6307\u5b9a\u865a\u62df\u7f51\u7edc\uff0c\u4e3a\u8fde\u63a5\u63d0\u4f9b\u7684\u7aef\u70b9URI\u548c\u5bc6\u94a5\u7b49\u3002<\/p>\n

API\u7684\u7c7b\u578b\u88ab\u8bbe\u5b9a\u4e3a\u6838\u5fc3(SQL)\u3002\u8fd8\u4e3aMongoDB\u7684API\u3001Cassandra\u3001Azure\u8868\u548cGremlin(\u56fe\u5f62)\u7b49API\u51c6\u5907\u4e86\u5176\u5b83\u9009\u9879\u3002
\n\uff08\u6211\u8ba4\u4e3a\u662f\u5173\u4e8e\u5728CosmosClient\u7684QueryItems\u4e2d\u4f7f\u7528\u54ea\u79cdAPI\u7c7b\u578b\u6765\u6267\u884c\u67e5\u8be2\uff09<\/p>\n

Azure Cosmos DB\u53ef\u4ee5\u901a\u8fc7Azure Portal\u6216\u8005ARM\u6a21\u677f\u90e8\u7f72\uff0c\u4f46\u8fd9\u6b21\u6211\u4eec\u5c06\u4f7f\u7528Azure Portal\u3002<\/p>\n

\"cosmosdb01.png\"<\/div>\n
\"cosmosdb02.png\"<\/div>\n

3. \u60a8\u5c06\u770b\u5230\u6807\u7b7e\u8bbe\u7f6e\u9009\u9879\uff0c\u4f46\u8fd9\u6b21\u6211\u4eec\u5c06\u9009\u62e9\u4e0d\u6307\u5b9a\u3002<\/p>\n

\"cosmosdb03.png\"<\/div>\n
\"cosmosdb05.png\"<\/div>\n

3. \u51c6\u5907Python\u6267\u884c\u73af\u5883<\/h2>\n

\u56e0\u4e3a\u6211\u5c06\u6765\u4f1a\u5c1d\u8bd5\u4f7f\u7528Azure Functions\uff0c\u6240\u4ee5\u6211\u5e0c\u671b\u80fd\u591f\u5728Python3.6\u865a\u62df\u73af\u5883\u4e2d\u8fd0\u884c\u8fdb\u884cCosmosDB\u6570\u636e\u64cd\u4f5c\u7684Python\u7a0b\u5e8f\u3002<\/p>\n

\u9996\u5148\uff0c\u521b\u5efa\u5e76\u6fc0\u6d3b\u865a\u62df\u73af\u5883\u3002<\/p>\n

python3.6 -m venv .env
\nsource .env\/bin\/activate<\/p>\n

\u7136\u540e\uff0c\u6211\u4eec\u5c06\u5b89\u88c5\u672c\u6b21\u4f7f\u7528\u7684Python\u6a21\u5757(azure-cosmos)\u3002<\/p>\n

\u5728\u547d\u4ee4\u884c\u4e2d\u8fd0\u884c\u4ee5\u4e0b\u547d\u4ee4\u5b89\u88c5\uff1a
\npip3.6 install azure-cosmos<\/p>\n

4. \u5728Python\u4e2d\u64cd\u4f5cCosmosDB\u7684\u6570\u636e\u3002<\/h2>\n

4.1. \u6267\u884c\u6837\u672c<\/h3>\n

\u9019\u6b21\u6e96\u5099\u7684\u7a0b\u5f0f\u78bc\u5728\u9019\u88e1\u3002
\n\uff03\u9019\u4efd\u7a0b\u5f0f\u78bc\u5728\u9019\u88e1\u7684\u8aaa\u660e\u6703\u4e0d\u6642\u9032\u884c\u66f4\u65b0\uff0c\u56e0\u6b64GitHub\u4e0a\u7684\u7248\u672c\u662f\u6700\u65b0\u7684\u3002<\/p>\n

\u5728cosmosdb\/config.py\u6587\u4ef6\u4e2d\u51c6\u5907\u4e86\u73af\u5883\u4fe1\u606f\uff0c\u5e76\u8bb0\u5f55\u4e86CosmosDB\u7684URI\u548c\u4e3b\u8981\u5bc6\u94a5\u3002
\n\uff08\u914d\u7f6e\u5185\u5bb9\u53ef\u5728AzurePortal-> CosmosDB-> \u4ece\u952e\u4e2d\u901a\u8fc7URI\u548c\u4e3b\u8981\u5bc6\u94a5\u786e\u8ba4\uff09<\/p>\n

git clone https:\/\/github.com\/moyota\/python-cosmosdb.git\r\ncd python-cosmosdb\r\npython3.6 -m venv .env\r\nsource .env\/bin\/activate\r\npip install -r requirements.txt\r\nvi cosmosdb\/config.py\r\npython -m Program\r\n<\/code><\/pre>\n
\u7531\u4e8e\u8fd8\u6709\u5b98\u65b9\u6587\u6863\u548cGitHub\uff08Azure\/azure-cosmos-python\uff09\u53ef\u4f9b\u53c2\u8003\uff0c\u6240\u4ee5\u8fd9\u4e24\u8005\u4e5f\u662f\u6709\u7528\u7684\u3002<\/p>\n
4.2. \u5173\u4e8e\u5bf9Cosmos DB\u7684\u6570\u636e\u64cd\u4f5c\u7684\u5b9e\u73b0<\/h3>\n
\u6211\u4f1a\u53c2\u8003 Azure SDK for Python\uff08azure.cosmos\u76f8\u5173\uff09\u7684\u6587\u6863\u8fdb\u884c\u5b9e\u73b0\u3002<\/p>\n
\u6211\u5011\u63d0\u4f9b\u4e86\u4e00\u500b\u5728\u69cb\u9020\u51fd\u6578\u5167\u9032\u884c\u6578\u64da\u5eab\u5b9a\u7fa9\u548c\u5bb9\u5668\uff08\u8868\u683c\u5b9a\u7fa9\uff09\u7684initialize_xxx\u65b9\u6cd5\uff0c\u4ee5\u53ca\u57f7\u884c\u9805\u76ee\uff08\u8a18\u9304\uff09\u7684CRUD\u64cd\u4f5c\u7684xxx_item\u65b9\u6cd5\u3002\uff08\u6578\u64da\u5eab\u9023\u63a5\u5728\u69cb\u9020\u51fd\u6578\u5167\u5be6\u73fe\uff09<\/p>\n
import<\/span> azure.cosmos.cosmos_client<\/span> as<\/span> cosmos_client<\/span>\r\nimport<\/span> azure.cosmos.errors<\/span> as<\/span> errors<\/span>\r\nfrom<\/span> .config<\/span> import<\/span> config<\/span>\r\nfrom<\/span> logging<\/span> import<\/span> getLogger<\/span>\r\nlogger<\/span> =<\/span> getLogger<\/span>(<\/span>__name__<\/span>)<\/span>\r\n\r\nclass<\/span> DatabaseConnection<\/span>():<\/span>\r\n    def<\/span> __init__<\/span>(<\/span>self<\/span>):<\/span>\r\n        # Initialize the Cosmos client\r\n<\/span>        self<\/span>.<\/span>client<\/span> =<\/span> cosmos_client<\/span>.<\/span>CosmosClient<\/span>(<\/span>url_connection<\/span>=<\/span>config<\/span>[<\/span>'ENDPOINT'<\/span>],<\/span>\r\n            auth<\/span>=<\/span>{<\/span>'masterKey'<\/span>:<\/span> config<\/span>[<\/span>'PRIMARYKEY'<\/span>]})<\/span>\r\n\r\n        # Read a database\r\n<\/span>        self<\/span>.<\/span>database_link<\/span> =<\/span> 'dbs\/'<\/span> +<\/span> config<\/span>[<\/span>'DATABASE'<\/span>]<\/span>\r\n\r\n        # Read a container\r\n<\/span>        self<\/span>.<\/span>container_link<\/span> =<\/span> self<\/span>.<\/span>database_link<\/span> +<\/span> '\/colls\/{0}'<\/span>.<\/span>format<\/span>(<\/span>config<\/span>[<\/span>'CONTAINER'<\/span>])<\/span>\r\n\r\n\r\n    def<\/span> get_options<\/span>(<\/span>self<\/span>):<\/span>\r\n        options<\/span> =<\/span> {<\/span>\r\n            'enableCrossPartitionQuery'<\/span>:<\/span> True<\/span>,<\/span>\r\n            'maxItemCount'<\/span>:<\/span> 5<\/span>,<\/span>\r\n        }<\/span>\r\n        return<\/span> options<\/span>\r\n\r\n\r\n    # Create a database\r\n<\/span>    def<\/span> initialize_database<\/span>(<\/span>self<\/span>,<\/span> database_id<\/span>=<\/span>config<\/span>[<\/span>'DATABASE'<\/span>]):<\/span>\r\n        try<\/span>:<\/span>        \r\n            return<\/span> self<\/span>.<\/span>client<\/span>.<\/span>CreateDatabase<\/span>({<\/span>'id'<\/span>:<\/span> database_id<\/span>})<\/span>\r\n            # database_link = self.database_link\r\n<\/span>            # database_link = db['_self']\r\n<\/span>        except<\/span> errors<\/span>.<\/span>HTTPFailure<\/span> as<\/span> e<\/span>:<\/span>\r\n            if<\/span> e<\/span>.<\/span>status_code<\/span> ==<\/span> 409<\/span>:<\/span>\r\n               print<\/span>(<\/span>'A database with id <\/span>\\'<\/span>{0}<\/span>\\'<\/span> already exists'<\/span>.<\/span>format<\/span>(<\/span>self<\/span>.<\/span>database_link<\/span>))<\/span>\r\n            else<\/span>:<\/span>\r\n                raise<\/span> errors<\/span>.<\/span>HTTPFailure<\/span>(<\/span>e<\/span>.<\/span>status_code<\/span>)<\/span>\r\n        except<\/span> Exception<\/span> as<\/span> e<\/span>:<\/span>\r\n            raise<\/span> e<\/span>\r\n\r\n\r\n    # Create a container\r\n<\/span>    def<\/span> initialize_container<\/span>(<\/span>self<\/span>,<\/span> database_id<\/span>=<\/span>config<\/span>[<\/span>'DATABASE'<\/span>],<\/span> container_id<\/span>=<\/span>config<\/span>[<\/span>'CONTAINER'<\/span>]):<\/span>\r\n        try<\/span>:<\/span>\r\n            database_link<\/span> =<\/span> 'dbs\/'<\/span> +<\/span> database_id<\/span>\r\n            container_definition<\/span> =<\/span> {<\/span>\r\n                'id'<\/span>:<\/span> container_id<\/span>,<\/span>\r\n                \"indexingPolicy\"<\/span>:<\/span> {<\/span>\r\n                    \"indexingMode\"<\/span>:<\/span> \"consistent\"<\/span>,<\/span> # consistent or lazy\r\n<\/span>                    \"automatic\"<\/span>:<\/span> True<\/span>,<\/span>\r\n                },<\/span>\r\n                \"partitionKey\"<\/span>:<\/span> {<\/span>\r\n                    \"paths\"<\/span>:<\/span> [<\/span>\r\n                      \"\/partitionKey\"<\/span>\r\n                    ],<\/span>\r\n                    \"kind\"<\/span>:<\/span> \"Hash\"<\/span>,<\/span>\r\n                }<\/span>\r\n            }<\/span>\r\n            return<\/span> self<\/span>.<\/span>client<\/span>.<\/span>CreateContainer<\/span>(<\/span>database_link<\/span>,<\/span> container_definition<\/span>,<\/span> {<\/span>'offerThroughput'<\/span>:<\/span> 400<\/span>})<\/span>\r\n        except<\/span> errors<\/span>.<\/span>CosmosError<\/span> as<\/span> e<\/span>:<\/span>\r\n            if<\/span> e<\/span>.<\/span>status_code<\/span> ==<\/span> 409<\/span>:<\/span>\r\n                logger<\/span>.<\/span>error<\/span>(<\/span>'A collection with id <\/span>\\'<\/span>{0}<\/span>\\'<\/span> already exists'<\/span>.<\/span>format<\/span>(<\/span>self<\/span>.<\/span>container_link<\/span>))<\/span>\r\n            else<\/span>:<\/span>\r\n                raise<\/span> errors<\/span>.<\/span>HTTPFailure<\/span>(<\/span>e<\/span>.<\/span>status_code<\/span>)<\/span> \r\n        except<\/span> Exception<\/span> as<\/span> e<\/span>:<\/span>\r\n            raise<\/span> e<\/span>\r\n\r\n\r\n    # Create and add a item to the container\r\n<\/span>    def<\/span> create_item<\/span>(<\/span>self<\/span>,<\/span> item<\/span>):<\/span>\r\n        query<\/span> =<\/span> {<\/span>'query'<\/span>:<\/span> 'SELECT * FROM c WHERE c.id = \"{0}\"'<\/span>.<\/span>format<\/span>(<\/span>item<\/span>[<\/span>\"id\"<\/span>])}<\/span>\r\n\r\n        try<\/span>:<\/span>\r\n            self<\/span>.<\/span>client<\/span>.<\/span>CreateItem<\/span>(<\/span>self<\/span>.<\/span>container_link<\/span>,<\/span> item<\/span>)<\/span>\r\n            results<\/span> =<\/span> list<\/span>(<\/span>self<\/span>.<\/span>client<\/span>.<\/span>QueryItems<\/span>(<\/span>self<\/span>.<\/span>container_link<\/span>,<\/span> query<\/span>,<\/span> self<\/span>.<\/span>get_options<\/span>()))<\/span>\r\n            for<\/span> item<\/span> in<\/span> results<\/span>:<\/span>\r\n                logger<\/span>.<\/span>info<\/span>(<\/span>item<\/span>)<\/span>\r\n            return<\/span> results<\/span>\r\n        except<\/span> errors<\/span>.<\/span>HTTPFailure<\/span> as<\/span> e<\/span>:<\/span>\r\n            if<\/span> e<\/span>.<\/span>status_code<\/span> ==<\/span> 404<\/span>:<\/span>\r\n                print<\/span>(<\/span>'A collection with id <\/span>\\'<\/span>{0}<\/span>\\'<\/span> does not exist'<\/span>.<\/span>format<\/span>(<\/span>self<\/span>.<\/span>container_link<\/span>))<\/span>\r\n            elif<\/span> e<\/span>.<\/span>status_code<\/span> ==<\/span> 409<\/span>:<\/span>\r\n                logger<\/span>.<\/span>error<\/span>(<\/span>'A Item with id <\/span>\\'<\/span>{0}<\/span>\\'<\/span> already exists'<\/span>.<\/span>format<\/span>(<\/span>item<\/span>[<\/span>'id'<\/span>]))<\/span>            \r\n            else<\/span>:<\/span> \r\n                raise<\/span> errors<\/span>.<\/span>HTTPFailure<\/span>(<\/span>e<\/span>.<\/span>status_code<\/span>)<\/span>\r\n        except<\/span> Exception<\/span> as<\/span> e<\/span>:<\/span>\r\n            raise<\/span> e<\/span>\r\n\r\n\r\n    # Delete a item from the container\r\n<\/span>    def<\/span> delete_item<\/span>(<\/span>self<\/span>,<\/span> item<\/span>):<\/span>\r\n        query<\/span> =<\/span> {<\/span>'query'<\/span>:<\/span> 'SELECT * FROM c WHERE c.id = \"{0}\"'<\/span>.<\/span>format<\/span>(<\/span>item<\/span>[<\/span>\"id\"<\/span>])}<\/span>\r\n\r\n        try<\/span>:<\/span>\r\n            results<\/span> =<\/span> self<\/span>.<\/span>client<\/span>.<\/span>QueryItems<\/span>(<\/span>self<\/span>.<\/span>container_link<\/span>,<\/span> query<\/span>,<\/span> self<\/span>.<\/span>get_options<\/span>())<\/span>\r\n            for<\/span> item<\/span> in<\/span> list<\/span>(<\/span>results<\/span>):<\/span>\r\n                logger<\/span>.<\/span>info<\/span>(<\/span>item<\/span>)<\/span>\r\n                options<\/span> =<\/span> self<\/span>.<\/span>get_options<\/span>()<\/span>\r\n                options<\/span>[<\/span>'partitionKey'<\/span>]<\/span> =<\/span> item<\/span>[<\/span>'partitionKey'<\/span>]<\/span>\r\n                self<\/span>.<\/span>client<\/span>.<\/span>DeleteItem<\/span>(<\/span>item<\/span>[<\/span>'_self'<\/span>],<\/span> options<\/span>)<\/span>\r\n            return<\/span> results<\/span>\r\n        except<\/span> errors<\/span>.<\/span>HTTPFailure<\/span> as<\/span> e<\/span>:<\/span>\r\n            if<\/span> e<\/span>.<\/span>status_code<\/span> ==<\/span> 404<\/span>:<\/span>\r\n                print<\/span>(<\/span>'A collection with id <\/span>\\'<\/span>{0}<\/span>\\'<\/span> does not exist'<\/span>.<\/span>format<\/span>(<\/span>self<\/span>.<\/span>container_link<\/span>))<\/span>\r\n            else<\/span>:<\/span>\r\n                raise<\/span> errors<\/span>.<\/span>HTTPFailure<\/span>(<\/span>e<\/span>.<\/span>status_code<\/span>)<\/span>\r\n        except<\/span> Exception<\/span> as<\/span> e<\/span>:<\/span>\r\n            raise<\/span> e<\/span>\r\n\r\n\r\n    # Upsert a item from the container\r\n<\/span>    def<\/span> upsert_item<\/span>(<\/span>self<\/span>,<\/span> item<\/span>):<\/span>\r\n        try<\/span>:<\/span>\r\n            result<\/span> =<\/span> self<\/span>.<\/span>client<\/span>.<\/span>UpsertItem<\/span>(<\/span>self<\/span>.<\/span>container_link<\/span>,<\/span> item<\/span>,<\/span> self<\/span>.<\/span>get_options<\/span>())<\/span>\r\n            logger<\/span>.<\/span>info<\/span>(<\/span>result<\/span>)<\/span>\r\n            return<\/span> result<\/span>\r\n        except<\/span> errors<\/span>.<\/span>HTTPFailure<\/span> as<\/span> e<\/span>:<\/span>\r\n            if<\/span> e<\/span>.<\/span>status_code<\/span> ==<\/span> 404<\/span>:<\/span>\r\n                print<\/span>(<\/span>'A collection with id <\/span>\\'<\/span>{0}<\/span>\\'<\/span> does not exist'<\/span>.<\/span>format<\/span>(<\/span>self<\/span>.<\/span>container_link<\/span>))<\/span>\r\n            else<\/span>:<\/span>\r\n                raise<\/span> errors<\/span>.<\/span>HTTPFailure<\/span>(<\/span>e<\/span>.<\/span>status_code<\/span>)<\/span>\r\n        except<\/span> Exception<\/span> as<\/span> e<\/span>:<\/span>\r\n            raise<\/span> e<\/span>\r\n\r\n\r\n    def<\/span> read_item<\/span>(<\/span>self<\/span>,<\/span> id<\/span>):<\/span>\r\n        query<\/span> =<\/span> {<\/span>'query'<\/span>:<\/span> 'SELECT * FROM c WHERE c.id = \"{0}\"'<\/span>.<\/span>format<\/span>(<\/span>id<\/span>)}<\/span>\r\n\r\n        try<\/span>:<\/span>\r\n            results<\/span> =<\/span> list<\/span>(<\/span>self<\/span>.<\/span>client<\/span>.<\/span>QueryItems<\/span>(<\/span>self<\/span>.<\/span>container_link<\/span>,<\/span> query<\/span>,<\/span> self<\/span>.<\/span>get_options<\/span>()))<\/span>\r\n            return<\/span> results<\/span>\r\n        except<\/span> errors<\/span>.<\/span>HTTPFailure<\/span> as<\/span> e<\/span>:<\/span>\r\n            if<\/span> e<\/span>.<\/span>status_code<\/span> ==<\/span> 404<\/span>:<\/span>\r\n                print<\/span>(<\/span>'A collection with id <\/span>\\'<\/span>{0}<\/span>\\'<\/span> does not exist'<\/span>.<\/span>format<\/span>(<\/span>self<\/span>.<\/span>container_link<\/span>))<\/span>\r\n            else<\/span>:<\/span>\r\n                raise<\/span> errors<\/span>.<\/span>HTTPFailure<\/span>(<\/span>e<\/span>.<\/span>status_code<\/span>)<\/span>\r\n        except<\/span> Exception<\/span> as<\/span> e<\/span>:<\/span>\r\nraise<\/span> e<\/span>\r\n\r\n\r\n    def<\/span> read_items<\/span>(<\/span>self<\/span>):<\/span>\r\n        try<\/span>:<\/span>\r\n            itemList<\/span> =<\/span> list<\/span>(<\/span>self<\/span>.<\/span>client<\/span>.<\/span>ReadItems<\/span>(<\/span>self<\/span>.<\/span>container_link<\/span>,<\/span> {<\/span>'maxItemCount'<\/span>:<\/span> 10<\/span>}))<\/span>\r\n\r\n            logger<\/span>.<\/span>info<\/span>(<\/span>'Found {0} documents'<\/span>.<\/span>format<\/span>(<\/span>itemList<\/span>.<\/span>__len__<\/span>()))<\/span>\r\n\r\n            for<\/span> item<\/span> in<\/span> itemList<\/span>:<\/span>\r\n                logger<\/span>.<\/span>info<\/span>(<\/span>item<\/span>)<\/span>\r\n            return<\/span> itemList<\/span>\r\n        except<\/span> errors<\/span>.<\/span>HTTPFailure<\/span> as<\/span> e<\/span>:<\/span>\r\n            if<\/span> e<\/span>.<\/span>status_code<\/span> ==<\/span> 404<\/span>:<\/span>\r\n                print<\/span>(<\/span>'A collection with id <\/span>\\'<\/span>{0}<\/span>\\'<\/span> does not exist'<\/span>.<\/span>format<\/span>(<\/span>self<\/span>.<\/span>container_link<\/span>))<\/span>\r\n            else<\/span>:<\/span>\r\n                raise<\/span> errors<\/span>.<\/span>HTTPFailure<\/span>(<\/span>e<\/span>.<\/span>status_code<\/span>)<\/span>\r\n        except<\/span> Exception<\/span> as<\/span> e<\/span>:<\/span>\r\n            raise<\/span> e<\/span>\r\n\r\n\r\n# Sample Data1\r\n<\/span>def<\/span> getReplacedItem<\/span>(<\/span>id<\/span>):<\/span>\r\n    return<\/span> {<\/span>\r\n        'id'<\/span>:<\/span> 'id{0}'<\/span>.<\/span>format<\/span>(<\/span>id<\/span>),<\/span>\r\n        'partitionKey'<\/span>:<\/span> id<\/span>,<\/span>\r\n        'message'<\/span>:<\/span> 'Hello World CosmosDB!'<\/span>,<\/span>\r\n        'addition'<\/span>:<\/span> 'test replace {0}'<\/span>.<\/span>format<\/span>(<\/span>id<\/span>),<\/span>\r\n    }<\/span>\r\n# Sample Data2\r\n<\/span>def<\/span> getItem<\/span>(<\/span>id<\/span>):<\/span>\r\n    return<\/span> {<\/span>\r\n        'id'<\/span>:<\/span> 'id{0}'<\/span>.<\/span>format<\/span>(<\/span>id<\/span>),<\/span>\r\n        'partitionKey'<\/span>:<\/span> id<\/span>,<\/span>\r\n        'message'<\/span>:<\/span> 'Hello World CosmosDB!'<\/span>,<\/span>\r\n    }<\/span>\r\n<\/code><\/pre>\n
\u5728\u5bb9\u5668\u5b9a\u4e49\uff08CreateContainer\uff09\u4e2d\uff0c\u60a8\u53ef\u4ee5\u5728\u5b9a\u4e49\u65f6\u6307\u5b9a\u5206\u533a\u952e\u3001\u7d22\u5f15\u7b56\u7565\u548c\u541e\u5410\u91cf\uff08RU\uff09\u3002
\n\uff08\u4f3c\u4e4e\u4e5f\u53ef\u4ee5\u6307\u5b9a\u552f\u4e00\u952e\u7b56\u7565\uff0c\u4f46\u9700\u8981\u786e\u8ba4\uff09<\/p>\n
\u540c\u65f6\uff0cCosmosClient\u7684CreateItem\/DeleteItem\/UpsertItem\/ReadItems\u65b9\u6cd5\u9700\u8981\u6307\u5b9a\u5bb9\u5668\u94fe\u63a5\uff0c\u53ef\u4ee5\u4f7f\u7528’dbs\/\u6570\u636e\u5e93\u540d\/colls\/\u5bb9\u5668\u540d’\u6216\u8005ReadContainer\u6765\u83b7\u53d6\u5e76\u6307\u5b9a\u3002<\/p>\n
UpsertItem\u65b9\u6cd5\u662f\u4e00\u4e2a\u6267\u884c\u66f4\u65b0\/\u63d2\u5165\u64cd\u4f5c\u7684\u65b9\u6cd5\uff0c\u5982\u679c\u9879\u76ee\u5177\u6709\u76f8\u540c\u7684id\uff0c\u90a3\u4e48\u5c06\u66f4\u65b0\u8be5\u503c\uff0c\u5982\u679cid\u4e0d\u540c\uff0c\u5219\u4f1a\u521b\u5efa\u4e00\u4e2a\u65b0\u9879\u76ee\u3002<\/p>\n
\u5982\u679c\u6570\u636e\u5e93\/\u5bb9\u5668\/\u9879\u76ee\u5df2\u7ecf\u5b58\u5728\uff0c\u5219\u4f1a\u53d1\u751f\u5f02\u5e38(errors.HTTPFailure.status_code\u4e3a409)\uff0c\u6240\u4ee5\u8bf7\u9002\u5f53\u5730\u6dfb\u52a0\u5f02\u5e38\u5904\u7406\u3002<\/p>\n
\u8bf7\u6ce8\u610f\uff0c\u5bf9\u4e8ecosmos_client\u7684DeleteItem\u65b9\u6cd5\uff0c\u5fc5\u987b\u5728\u9009\u9879\u4e2d\u6307\u5b9a\u5206\u533a\u952e\u7684\u503c\u3002\u5982\u679c\u6ca1\u6709\u8fdb\u884c\u6b64\u6307\u5b9a\uff0c\u5c06\u4f1a\u5f15\u53d1\u4ee5\u4e0b\u5f02\u5e38\uff08\u53c2\u8003\uff09\u3002\u5982\u679c\u9879\u76ee\u4e2d\u6ca1\u6709\u6307\u5b9a\u5206\u533a\u952e\uff0c\u5219\u8bf7\u4f7f\u7528upsert\u65b9\u6cd5\u6216\u5176\u4ed6\u65b9\u6cd5\u6765\u6ce8\u518c\u952e\u503c\u3002<\/p>\n
\u5c06\u4e0a\u8ff0\u51c6\u5907\u597d\u7684\u4ee3\u7801\u653e\u5165Azure Functions\u4e2d\uff0c\u5e76\u4f5c\u4e3a\u6837\u4f8b\u4ee3\u7801\u8fd0\u884c\u3002getItem\u548cgetReplacedItem\u662f\u4e3a\u4e86\u751f\u6210\u865a\u62df\u6570\u636e\u800c\u51c6\u5907\u7684\u51fd\u6570\u3002<\/p>\n
from<\/span> cosmosdb.cosmosdb<\/span> import<\/span> DatabaseConnection<\/span>\r\nfrom<\/span> cosmosdb.cosmosdb<\/span> import<\/span> getItem<\/span>,<\/span> getReplacedItem<\/span>\r\n\r\nif<\/span> __name__<\/span> ==<\/span> \"__main__\"<\/span>:<\/span>\r\n    print<\/span>(<\/span>\"---\"<\/span>)<\/span>\r\n    dbConnection<\/span> =<\/span> DatabaseConnection<\/span>()<\/span>\r\n\r\n    print<\/span>(<\/span>dbConnection<\/span>.<\/span>initialize_database<\/span>())<\/span>\r\n    print<\/span>(<\/span>dbConnection<\/span>.<\/span>initialize_container<\/span>())<\/span>\r\n\r\n    dbConnection<\/span>.<\/span>create_item<\/span>(<\/span>getItem<\/span>(<\/span>\"1\"<\/span>))<\/span>\r\n    dbConnection<\/span>.<\/span>create_item<\/span>(<\/span>getItem<\/span>(<\/span>\"2\"<\/span>))<\/span>\r\n    dbConnection<\/span>.<\/span>create_item<\/span>(<\/span>getItem<\/span>(<\/span>\"3\"<\/span>))<\/span>\r\n    dbConnection<\/span>.<\/span>upsert_item<\/span>(<\/span>getReplacedItem<\/span>(<\/span>\"3\"<\/span>))<\/span>\r\n    dbConnection<\/span>.<\/span>upsert_item<\/span>(<\/span>getReplacedItem<\/span>(<\/span>\"4\"<\/span>))<\/span>\r\n    dbConnection<\/span>.<\/span>delete_item<\/span>(<\/span>getItem<\/span>(<\/span>\"2\"<\/span>))<\/span>\r\n\r\n    print<\/span>(<\/span>\"---\"<\/span>)<\/span>\r\n    itemList<\/span> =<\/span> dbConnection<\/span>.<\/span>read_items<\/span>()<\/span>\r\n    for<\/span> item<\/span> in<\/span> itemList<\/span>:<\/span>\r\n        print<\/span>(<\/span>item<\/span>)<\/span>\r\n<\/code><\/pre>\n
\u6267\u884c\u4e00\u6b21\u5e76\u67e5\u770b\u6570\u636e\u6d4f\u89c8\u5668\uff0c\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n
python -m Program<\/p>\n
\"cosmosdb04.png\"<\/div>\n
\u603b\u7ed3<\/h2>\n
\u8fd9\u6b21\u51c6\u5907\u4f7f\u7528Python\u64cd\u4f5cCosmosDB\uff0c\u4f46\u7531\u4e8e\u5b98\u65b9\u6587\u6863\u975e\u5e38\u5b8c\u5584\uff0c\u6211\u4eec\u5b9e\u9645\u4e0a\u5c06\u5728\u5b9e\u65bd\u8fc7\u7a0b\u4e2d\u53c2\u8003\u6587\u6863\u8fdb\u884c\u64cd\u4f5c\u3002
\n\u5173\u4e8e\u5bb9\u5668\u5b9a\u4e49\u548c\u9009\u9879\u53c2\u6570\u7684\u8be6\u7ec6\u4fe1\u606f\u53ef\u80fd\u6ca1\u6709\u5728\u6587\u6863\u4e2d\u5217\u51fa\uff0c\u6240\u4ee5\u6211\u4eec\u9700\u8981\u5728\u6478\u7d22\u4e2d\u8fdb\u884c\u8c03\u67e5\u3002
\n\u6b64\u5916\uff0c\u6211\u5e0c\u671b\u5c06\u6267\u884c\u73af\u5883\u8bbe\u7f6e\u4e3aAzure Functions\uff0c\u5e76\u5f00\u59cb\u5b9e\u73b0GraphQL\u7684API\u3002<\/p>\n
\u8bf7\u63d0\u4f9b\u76f8\u5173\u8d44\u6599<\/h2>\n
\u7528 Azure Cosmos DB SQL API \u5e10\u6237\u6765\u6784\u5efa Python \u5e94\u7528\u7a0b\u5e8f\uff1aAzure Cosmos DB \u8bf4\u660e\u6587\u6863 (\u5b98\u65b9)\u3001Azure Cosmos DB Python \u793a\u4f8b\u3001Azure\/azure-cosmos-python\uff08GitHub\uff09\u3001Python \u7684 Azure SDK (azure.cosmos.cosmos_client)\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
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