{"id":50105,"date":"2024-01-03T09:58:33","date_gmt":"2022-12-22T20:13:25","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%bc%80%e5%a7%8b%e4%bd%bf%e7%94%a8cassandra-python-fastapi%e8%bf%9b%e8%a1%8crest-api%e5%bc%80%e5%8f%91%e5%ae%9e%e8%b7%b5\/"},"modified":"2024-05-04T16:38:19","modified_gmt":"2024-05-04T08:38:19","slug":"%e5%bc%80%e5%a7%8b%e4%bd%bf%e7%94%a8cassandra-python-fastapi%e8%bf%9b%e8%a1%8crest-api%e5%bc%80%e5%8f%91%e5%ae%9e%e8%b7%b5","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%bc%80%e5%a7%8b%e4%bd%bf%e7%94%a8cassandra-python-fastapi%e8%bf%9b%e8%a1%8crest-api%e5%bc%80%e5%8f%91%e5%ae%9e%e8%b7%b5\/","title":{"rendered":"\u5f00\u59cb\u4f7f\u7528Cassandra + Python + FastAPI\u8fdb\u884cREST API\u5f00\u53d1\u5b9e\u8df5"},"content":{"rendered":"

\u9996\u5148<\/h1>\n

\u6709\u5173Apache Cassandra<\/h2>\n

Apache Cassandra\u662f\u4e00\u4e2a\u5f00\u6e90\u7684\u5206\u5e03\u5f0f\u6570\u636e\u5e93\u7ba1\u7406\u7cfb\u7edf\u3002<\/p>\n

\u4e0e\u5176\u4ed6\u5206\u5e03\u5f0f\u6570\u636e\u5e93\u7ba1\u7406\u7cfb\u7edf\u7c7b\u4f3c\uff0c\u6211\u4eec\u4f7f\u7528\u591a\u4e2a\u901a\u7528\u670d\u52a1\u5668\u6765\u6784\u5efa\u4e00\u4e2a\u6570\u636e\u5e93\uff08\u53ea\u4f7f\u7528\u4e00\u4e2a\u670d\u52a1\u5668\u8fdb\u884c\u6784\u5efa\u4e5f\u662f\u53ef\u80fd\u7684\uff0c\u6839\u636e\u5f00\u53d1\u7b49\u9700\u6c42\u6765\u51b3\u5b9a\uff09\u3002<\/p>\n

\u5728\u8fd9\u91cc\uff0c\u6211\u4eec\u5c06\u7701\u7565\u8be6\u7ec6\u7684\u89e3\u91ca\uff0c\u5c06\u4ecb\u7ecd\u7684\u8d23\u4efb\u7559\u7ed9\u5bf9\u6b64\u6709\u5174\u8da3\u7684\u4eba\uff0c\u5b98\u65b9\u7f51\u7ad9\u548c\u7ef4\u57fa\u767e\u79d1\u4f1a\u63d0\u4f9b\u66f4\u8be6\u7ec6\u7684\u4ecb\u7ecd\u3002<\/p>\n

 <\/p>\n

\u4f7f\u7528Cassandra + Python + FastAPI\u8fdb\u884cREST API\u5f00\u53d1\u3002<\/h1>\n

\u5728\u8fd9\u7bc7\u6587\u7ae0\u4e2d\uff0c\u6211\u4eec\u5c06\u5f00\u53d1\u4e00\u4e2a\u81ea\u5b9a\u4e49\u7684REST API\uff0c\u7528\u4e8e\u8986\u76d6\u5f00\u53d1\u4eba\u5458\u5b9a\u4e49\u7684\u5bf9\u8868\u8fdb\u884cCRUD\u64cd\u4f5c\u3002<\/p>\n

\u4ee3\u7801\u4e5f\u5728\u8fd9\u91cc\u516c\u5f00\u3002<\/p>\n

 <\/p>\n

\u6211\u5df2\u7ecf\u7528\u82f1\u6587\u5728\u4e0a\u8ff0\u5b58\u50a8\u5e93\u4e2d\u5199\u4e86\u8bf4\u660e\uff0c\u4f46\u5728\u8fd9\u91cc\u6211\u5c06\u7528\u65e5\u6587\u6765\u89e3\u91ca\u3002<\/p>\n

\u5f15\u8a00\uff1a\u5173\u4e8eDataStax Astra DB<\/h2>\n

\u5728\u8fd9\u4e2a\u7a0b\u5e8f\u4e2d\uff0c\u6211\u4eec\u5c06\u4f7f\u7528DataStax\u63d0\u4f9b\u7684DBaaS\u670d\u52a1AstraDB\u4f5c\u4e3a\u8fde\u63a5\u76ee\u6807\u7684Cassandra\u6570\u636e\u5e93\u3002<\/p>\n

\u4f7f\u7528DataStax AstraDB\u7684\u5f00\u53d1\u4eba\u5458\u53ef\u4ee5\u6839\u636eAstraDB\u63a7\u5236\u5e73\u9762\uff08\u6570\u636e\u5e93\u4eea\u8868\u677f\u7684\u8fde\u63a5\u9009\u9879\u5361\uff09\u63d0\u4f9b\u7684\u5177\u4f53\u6b65\u9aa4\uff0c\u8f7b\u677e\u786e\u8ba4\u4ece\u5404\u79cd\u7f16\u7a0b\u8bed\u8a00\u7684\u8fde\u63a5\u3002\u4f7f\u7528\u7684\u793a\u4f8b\u7a0b\u5e8f\u7528\u4e8e\u8fde\u63a5\u5230\u6570\u636e\u5e93\u5e76\u663e\u793a\u7cfb\u7edf\u8868\uff08system.local\uff09\u7684\u4fe1\u606f\uff0c\u7528\u4e8e\u8fde\u63a5\u786e\u8ba4\uff08\u4f8b\u5982\uff0c\u5982Python\u4e2d\u7684connect_database.py\uff09\u3002<\/p>\n

\u6b64\u5916\uff0cAstraDB\u9ed8\u8ba4\u63d0\u4f9b\u4e86\u7528\u4e8e\u5bf9Cassandra\u8868\u6267\u884cCRUD\u64cd\u4f5c\u7684REST API\u3002\u56e0\u6b64\uff0c\u8fd9\u91cc\u63d0\u4f9b\u7684\u4ee3\u7801\u53ef\u80fd\u770b\u8d77\u6765\u50cf\u662f\u91cd\u65b0\u53d1\u660e\u8f6e\u5b50\u3002\u7136\u800c\uff0c\u5728\u5b9e\u9645\u9879\u76ee\u4e2d\uff0c\u5e76\u4e0d\u603b\u662f\u5c06\u6570\u636e\u64cd\u4f5c\u672c\u8eab\u4f5c\u4e3aAPI\u63d0\u4f9b\u548c\u4f7f\u7528\u7684\u60c5\u51b5\uff0c\u5f80\u5f80\u6d89\u53ca\u4e00\u4e9b\u4e1a\u52a1\u903b\u8f91\u3002\u4f8b\u5982\uff0c\u4e00\u4e2aAPI\u8c03\u7528\u53ef\u80fd\u5305\u62ec\u5bf9\u591a\u4e2a\u8868\u7684\u64cd\u4f5c\u3002\u5728\u8fd9\u91cc\u63d0\u4f9b\u7684\u4ee3\u7801\u867d\u7136\u6ca1\u6709\u5b9e\u73b0\u7279\u5b9a\u7684\u903b\u8f91\uff0c\u4f46\u53ef\u4ee5\u8003\u8651\u5b83\u4f5c\u4e3a\u6a21\u62df\u5e26\u6709\u4e1a\u52a1\u903b\u8f91\u7684API\uff0c\u6216\u8005\u4f5c\u4e3a\u5f00\u53d1\u8fd9\u79cdAPI\u7684\u6837\u677f\u3002<\/p>\n

\u5f00\u53d1\u7684\u7269\u54c1<\/h2>\n

\u6837\u4f8b\u7a0b\u5e8f\u63d0\u4f9bREST API\u3002
\n\u6b64\u5916\uff0c\u8fd8\u63d0\u4f9b\u7b26\u5408Open API\u6807\u51c6\u7684Web UI\u3002<\/p>\n

\"image.png\"<\/div>\n

\u5f00\u53d1\u8fc7\u7a0b<\/h2>\n

\u51c6\u5907\u597d<\/h2>\n

\u5728\u8fd9\u91cc\uff0c\u6211\u4eec\u5047\u8bbe\u5728AstraDB\u4e0a\u5df2\u7ecf\u521b\u5efa\u4e86\u6570\u636e\u5e93\u3002<\/p>\n

 <\/p>\n

\u53e6\u5916\uff0c\u5728 AstraDB \u7684\u63a7\u5236\u5e73\u9762\uff08\u6570\u636e\u5e93\u4eea\u8868\u677f\u7684\u300c\u8fde\u63a5\u300d\u9009\u9879\u5361\u4e2d\uff09\u63d0\u4f9b\u7684\u6b65\u9aa4\uff0c\u5047\u8bbe\u60a8\u5df2\u7ecf\u719f\u6089\u3002<\/p>\n

\u8bf7\u653e\u5fc3\uff0c\u4e0a\u8ff0\u51c6\u5907\u5de5\u4f5c\u5e94\u8be5\u5e76\u4e0d\u590d\u6742\u3002\u60a8\u4e0d\u9700\u8981\u8f93\u5165\u4fe1\u7528\u5361\u4fe1\u606f\u5373\u53ef\u5b8c\u6210\u6ce8\u518c\u3002\u8bf7\u52a1\u5fc5\u8bd5\u7528\u4e00\u4e0b\u3002<\/p>\n

\u53e6\u5916\uff0c\u5982\u679c\u5c06\u6570\u636e\u5e93\u8fde\u63a5\u4f5c\u4e3a\u5355\u72ec\u7684\u90e8\u5206\uff0c\u4e5f\u53ef\u4ee5\u5c06\u5176\u5e94\u7528\u5230\u5f00\u6e90\u8f6f\u4ef6Apache Cassandra\u4e0a\u3002<\/p>\n

Python\u7684\u61c9\u7528\u73af\u5883<\/h2>\n

\u51c6\u5907Python\u73af\u5883\u3002\u8fd9\u91cc\u5c06\u5c55\u793a\u5728Windows\u4e0a\u64cd\u4f5c\u7684\u8bb0\u5f55\u3002<\/p>\n

conda create -n datastax -y python=3 pip\r\nconda activate datastax\r\n<\/code><\/pre>\n
python --version\r\nPython 3.10.4\r\npip --version\r\npip 21.2.4 from C:\\Users\\yoshi\\Anaconda3\\envs\\datastax\\lib\\site-packages\\pip (python 3.10)\r\n<\/code><\/pre>\n
Python\u8f6f\u4ef6\u5305<\/h2>\n
\u5b89\u88c5\u6240\u9700\u7684\u8f6f\u4ef6\u5305\u3002<\/p>\n
pip install fastapi\r\npip install uvicorn[standard]\r\n<\/code><\/pre>\n
pip install cassandra-driver\r\n<\/code><\/pre>\n
\u6570\u636e\u6a21\u578b<\/h2>\n
\u6211\u5c06\u5728Cassandra\uff08AstraDB\uff09\u4e2d\u521b\u5efa\u4ee5\u4e0b\u7684\u952e\u7a7a\u95f4\u548c\u8868\u3002<\/p>\n
\u952e\u7a7a\u95f4: \u6d4b\u8bd5<\/h3>\n
\u8868\u683c\uff1a\u4f1a\u5458<\/h3>\n
CREATE TABLE test.member (\r\n    id text PRIMARY KEY,\r\n    first_name text,\r\n    last_name text\r\n) \r\n<\/code><\/pre>\n
\u4ee3\u7801 ma)<\/h2>\n
\u8bf7\u6309\u7167AstraDB\u63a7\u5236\u5e73\u9762\uff08\u6570\u636e\u5e93\u4eea\u8868\u677f\u7684”\u8fde\u63a5”\u9009\u9879\u5361\uff09\u63d0\u4f9b\u7684\u6307\u793a\uff0c\u5bf9\u4ee5\u4e0b\u4ee3\u7801\uff08astra_main.py\uff09\u8fdb\u884c\u7f16\u8f91\u3002<\/p>\n
from<\/span> fastapi<\/span> import<\/span> FastAPI<\/span>\r\nfrom<\/span> pydantic<\/span> import<\/span> BaseModel<\/span>\r\n\r\nfrom<\/span> cassandra.cluster<\/span> import<\/span> Cluster<\/span>\r\nfrom<\/span> cassandra.auth<\/span> import<\/span> PlainTextAuthProvider<\/span>\r\n\r\ncloud_config<\/span>=<\/span> {<\/span>\r\n        '<\/span>secure_connect_bundle<\/span>'<\/span>:<\/span> '<\/span>.\/exclude\/secure-connect-<<YOUR DB NAME>>.zip<\/span>'<\/span>\r\n}<\/span>\r\nauth_provider<\/span> =<\/span> PlainTextAuthProvider<\/span>(<\/span>'<\/span><<CLIENT ID>><\/span>'<\/span>,<\/span> '<\/span><<CLIENT SECRET>><\/span>'<\/span>)<\/span>\r\ncluster<\/span> =<\/span> Cluster<\/span>(<\/span>cloud<\/span>=<\/span>cloud_config<\/span>,<\/span> auth_provider<\/span>=<\/span>auth_provider<\/span>)<\/span>\r\nsession<\/span> =<\/span> cluster<\/span>.<\/span>connect<\/span>()<\/span>\r\n\r\napp<\/span> =<\/span> FastAPI<\/span>()<\/span>\r\n\r\nclass<\/span> Member<\/span>(<\/span>BaseModel<\/span>):<\/span>\r\n    first_name<\/span>:<\/span> str<\/span>\r\n    last_name<\/span>:<\/span> str<\/span>\r\n    id<\/span>:<\/span> str<\/span>\r\n\r\n@app.get<\/span>(<\/span>\"<\/span>\/<\/span>\"<\/span>)<\/span>\r\nasync<\/span> def<\/span> read_root<\/span>():<\/span>\r\n    return<\/span> {<\/span>\"<\/span>Status<\/span>\"<\/span>:<\/span> \"<\/span>On<\/span>\"<\/span>}<\/span>\r\n\r\n\r\n@app.get<\/span>(<\/span>\"<\/span>\/members\/{member_id}<\/span>\"<\/span>)<\/span>\r\nasync<\/span> def<\/span> read_member<\/span>(<\/span>member_id<\/span>:<\/span> str<\/span>):<\/span>\r\n\r\n    row<\/span> =<\/span> session<\/span>.<\/span>execute<\/span>(<\/span>\"<\/span>select first_name, last_name from test.member where id = %s<\/span>\"<\/span>,[<\/span>member_id<\/span>]).<\/span>one<\/span>()<\/span>\r\n\r\n    if<\/span> row<\/span>:<\/span>\r\n        return<\/span> {<\/span>\"<\/span>member_id<\/span>\"<\/span>:<\/span> member_id<\/span>,<\/span> \"<\/span>first_name<\/span>\"<\/span>:<\/span>row<\/span>[<\/span>0<\/span>],<\/span> \"<\/span>last_name<\/span>\"<\/span>:<\/span> row<\/span>[<\/span>1<\/span>]}<\/span>\r\n    else<\/span>:<\/span>\r\n        return<\/span> {<\/span>\"<\/span>member_id<\/span>\"<\/span>:<\/span> member_id<\/span>}<\/span>\r\n\r\n@app.put<\/span>(<\/span>\"<\/span>\/members\/upsert\/{member_id}<\/span>\"<\/span>)<\/span>\r\ndef<\/span> upsert_member<\/span>(<\/span>member_id<\/span>:<\/span> str<\/span>,<\/span> member<\/span>:<\/span> Member<\/span>):<\/span>\r\n\r\n    session<\/span>.<\/span>execute<\/span>(<\/span>\"\"\"<\/span>\r\n        insert into test.member (id, first_name, last_name)\r\n        values (%s, %s, %s)\r\n        <\/span>\"\"\"<\/span>,<\/span>\r\n        (<\/span>member_id<\/span>,<\/span> member<\/span>.<\/span>first_name<\/span>,<\/span> member<\/span>.<\/span>last_name<\/span>)<\/span>\r\n    )<\/span>\r\n    return<\/span> {<\/span>\"<\/span>member_id<\/span>\"<\/span>:<\/span> member_id<\/span>}<\/span>\r\n\r\n@app.get<\/span>(<\/span>\"<\/span>\/members\/delete\/{member_id}<\/span>\"<\/span>)<\/span>\r\nasync<\/span> def<\/span> delete_member<\/span>(<\/span>member_id<\/span>:<\/span> str<\/span>):<\/span>\r\n\r\n    row<\/span> =<\/span> session<\/span>.<\/span>execute<\/span>(<\/span>\"<\/span>delete from test.member where id = %s<\/span>\"<\/span>,[<\/span>member_id<\/span>]).<\/span>one<\/span>()<\/span>\r\n\r\n    return<\/span> {<\/span>\"<\/span>deleted<\/span>\"<\/span>:<\/span> member_id<\/span>}<\/span>\r\n<\/code><\/pre>\n
\u5229\u7528\u6cd5 – \u501f\u52a9\u65b9\u6cd5<\/h2>\n
\u8bf7\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u8fdb\u884c\u6267\u884c\u3002<\/p>\n
uvicorn astra_main:app --reload\r\n<\/code><\/pre>\n
\u6211\u4f1a\u5728\u4e0b\u9762\u7684\u94fe\u63a5\u4e2d\u8fdb\u884c\u786e\u8ba4\u3002<\/p>\n
 <\/p>\n
\u6700\u540e<\/h1>\n
\u6211\u5df2\u7ecf\u4e86\u89e3\u4e86\u4f7f\u7528Cassandra\u548cPython\u7ec4\u5408\u521b\u5efaREST API\u7684\u65b9\u6cd5\u3002
\n\u5173\u4e8eFastAPI\u7684\u8be6\u7ec6\u4fe1\u606f\uff0c\u8bf7\u67e5\u9605\u4ee5\u4e0b\u6587\u6863\u7b49\u3002<\/p>\n
\u5e0c\u671b\u60a8\u80fd\u901a\u8fc7\u67e5\u770b\u6211\u4eec\u4ecb\u7ecd\u7684\u6837\u4f8b\u4ee3\u7801\u6765\u4e86\u89e3\u4e0eCassandra\u7684CRUD\u64cd\u4f5c\u76f8\u5173\u7684\u7f16\u7801\u5b9e\u73b0\u3002<\/p>\n
 <\/p>\n","protected":false},"excerpt":{"rendered":"
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