{"id":48090,"date":"2023-10-13T07:33:56","date_gmt":"2023-04-24T12:41:59","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bb%a5%e6%97%a0%e6%9c%8d%e5%8a%a1%e5%99%a8%e6%96%b9%e5%bc%8f%e4%bd%bf%e7%94%a8graphql%ef%bc%88python-graphene-dynamodb-zappa%ef%bc%89\/"},"modified":"2024-05-04T03:59:07","modified_gmt":"2024-05-03T19:59:07","slug":"%e4%bb%a5%e6%97%a0%e6%9c%8d%e5%8a%a1%e5%99%a8%e6%96%b9%e5%bc%8f%e4%bd%bf%e7%94%a8graphql%ef%bc%88python-graphene-dynamodb-zappa%ef%bc%89","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bb%a5%e6%97%a0%e6%9c%8d%e5%8a%a1%e5%99%a8%e6%96%b9%e5%bc%8f%e4%bd%bf%e7%94%a8graphql%ef%bc%88python-graphene-dynamodb-zappa%ef%bc%89\/","title":{"rendered":"\u4ee5\u65e0\u670d\u52a1\u5668\u65b9\u5f0f\u4f7f\u7528GraphQL\uff08Python + Graphene + DynamoDB + Zappa\uff09"},"content":{"rendered":"

\u8be5\u6587\u7ae0\u662f2017\u5e74Serverless Advent Calendar\u7b2c21\u5929\u7684\u6587\u7ae0\u3002<\/p>\n

\u636e\u8bf4AppSync\u7684\u9884\u89c8\u7533\u8bf7\u6b63\u5728\u8fc5\u901f\u901a\u8fc7\u3002
\n\u6211\u5728\u53d1\u5e03\u540e\u7acb\u5373\u7533\u8bf7\u4e86\uff0c\u672c\u6765\u60f3\u7b49\u5230\u5199\u8fd9\u7bc7\u6587\u7ae0\u65f6\u7533\u8bf7\u901a\u8fc7\u5c31\u5c1d\u8bd5\u4f7f\u7528AppSync\u8fdb\u884c\u4e00\u4e9b\u5c1d\u8bd5\uff0c\u4f46\u662f\u5230\u73b0\u5728\u8fd8\u6ca1\u6709\u901a\u8fc7\uff0c\u6240\u4ee5\u6211\u7070\u5fc3\u4e86\uff0c\u5c31\u5c1d\u8bd5\u4e86\u8fd9\u6837\u7684\u4e8b\u60c5\u3002<\/p>\n

\u5f53\u6211\u5728\u8c37\u6b4c\u4e0a\u641c\u7d22\u65f6\uff0c\u5e38\u5e38\u80fd\u591f\u627e\u5230\u4f7f\u7528Node.js\u5b9e\u73b0\u65e0\u670d\u52a1\u5668GraphQL\u7684\u6848\u4f8b\uff0c\u4f46\u5374\u627e\u4e0d\u5230Python\u7684\u6848\u4f8b\uff0c\u6240\u4ee5\u6211\u5c1d\u8bd5\u7740\u5b9e\u73b0\u4e86\u4e00\u4e0b\u3002<\/p>\n

\u9274\u4e8e\u6211\u5bf9GraphQL\u6280\u672f\u8fd8\u5728\u5b66\u4e60\u9636\u6bb5\uff0c\u6240\u4ee5\u4e0d\u4f1a\u8fdb\u884c\u89e3\u91ca\u3002\u8fd9\u91cc\u4ec5\u8bf4\u660e\uff1a\u55e8\uff0c\u5b83\u5df2\u7ecf\u8fd0\u884c\u5566\uff01<\/p>\n

\u6211\u60f3\u505a\u7684\u4e8b\u60c5<\/h1>\n

\u5ba2\u6237\u7aef
\n\u2193 \u2191\uff08GraphQL\uff09
\nAPI \u7f51\u5173
\n\u2193 \u2191
\nLambda\uff08Python3\uff09
\n\u2193 \u2191
\nDynamoDB<\/p>\n

\u73af\u5883<\/h1>\n
$ python --version\r\nPython 3.6.1\r\n$ pip --version\r\npip 9.0.1\r\n<\/code><\/pre>\n
\u4f7f\u7528\u7684\u6846\u67b6\u6a21\u5757<\/h1>\n
\u77f3\u58a8\u70ef<\/h4>\n
GraphQL\u7684\u6846\u67b6\u3002<\/p>\n
PynamoDB<\/h4>\n
\u8fd9\u4e2a\u5de5\u5177\u53ef\u4ee5\u8ba9Python\u5f00\u53d1\u8005\u8f7b\u677e\u5730\u4f7f\u7528DynamoDB\u3002<\/p>\n
graphql-pynamodb\u662f\u4e00\u4e2a\u7528\u4e8e\u5728Python\u4e2d\u8fde\u63a5GraphQL\u548cPynamoDB\u7684\u5e93\u3002<\/h4>\n
\u4f7f\u7528Flask + Graphene + PynamoDB\u5b9e\u73b0\u96c6\u6210\u3002<\/p>\n
\u624e\u5e15<\/h4>\n
\u65e0\u670d\u52a1\u5668\u6846\u67b6\u3002\u53ef\u4ee5\u5c06\u4f7f\u7528Flask\u7f16\u5199\u7684\u5e94\u7528\u7a0b\u5e8f\u90e8\u7f72\u4e3a\u65e0\u670d\u52a1\u5668\u5e94\u7528\u7a0b\u5e8f\u3002\u5b83\u5c06\u4e3a\u60a8\u90e8\u7f72API Gateway\u548cLambda\u3002<\/p>\n
\u4f7f\u7528\u6837\u672c<\/h1>\n
\u5728 graphql-pynamodb \u4e2d\u5305\u542b\u6709\u4e00\u4e2a Flask \u5e94\u7528\u7a0b\u5e8f\u7684\u793a\u4f8b\uff0c\u4f7f\u7528\u5b83\u53ef\u4ee5\u6784\u5efa\u4e00\u4e2a\u53ef\u4ee5\u901a\u8fc7 GraphQL \u67e5\u8be2 DynamoDB \u6570\u636e\u7684 Flask \u5e94\u7528\u7a0b\u5e8f\u3002\uff08\u7a0d\u5fae\u8fdb\u884c\u4e86\u4e00\u4e9b\u4fee\u6539\uff0c\u7a0d\u540e\u4f1a\u8fdb\u884c\u8bf4\u660e\u3002\uff09<\/p>\n
\u9009\u62e9Zappa\u4f5c\u4e3a\u65e0\u670d\u52a1\u5668\u6846\u67b6\u7684\u539f\u56e0\u662f\u56e0\u4e3a\u8fd9\u4e2a\u539f\u56e0\u3002\u5982\u679c\u4f7f\u7528Zappa\u76f4\u63a5\u90e8\u7f72\u8fd9\u4e2aFlask\u5e94\u7528\uff0c\u53ef\u4ee5\u7b80\u5355\u5730\u5b9e\u73b0\u65e0\u670d\u52a1\u5668\u5316\u3002<\/p>\n
\u5907 **************************************************************************<\/h1>\n
$ <\/span>git clone https:\/\/github.com\/yfilali\/graphql-pynamodb.git\r\n$ <\/span>cd <\/span>graphql-pynamodb\/examples\/flask_pynamodb\r\n$ <\/span>virtualenv env<\/span>\r\n$ <\/span>source env<\/span>\/bin\/activate\r\n$ <\/span>pip install<\/span> -r<\/span> requirements.txt\r\n<\/code><\/pre>\n
\u5230\u76ee\u524d\u4e3a\u6b62\uff0c\u6309\u7167README\u4e2d\u7684\u6b65\u9aa4\u8fdb\u884c\u64cd\u4f5c\u3002
\n\u56e0\u4e3arequirements.txt\u4e2d\u5217\u51fa\u7684\u6a21\u5757\u7248\u672c\u8fc7\u65e7\uff0c\u5bfc\u81f4\u51fa\u73b0\u9519\u8bef\uff0c\u6240\u4ee5\u9700\u8981\u5b89\u88c5\u6700\u65b0\u7248\u672c\u3002<\/p>\n
\r\n$ pip install graphene-pynamodb==1.0.0 graphene==2.0\r\n<\/code><\/pre>\n
\u6211\u5df2\u7ecf\u66f4\u6539\u4e86 graphene \u548c graphene-pynamodb \u7684\u7248\u672c\u3002<\/p>\n
\u63a5\u4e0b\u6765\u6211\u4eec\u5c06\u4fee\u6539models.py\u6587\u4ef6\u3002
\n\u5728\u8fd9\u91cc\u6211\u4eec\u5b9a\u4e49\u4e86DynamoDB\u7684\u952e\u540d\u548c\u6570\u636e\u7c7b\u578b\u7b49\u4fe1\u606f\u3002\u7531\u4e8e\u8fd9\u4e2a\u793a\u4f8b\u770b\u8d77\u6765\u662f\u5728\u8bbf\u95ee\u672c\u5730\u6570\u636e\u5e93\uff0c\u6240\u4ee5\u6211\u4eec\u6ce8\u91ca\u6389\u8fd9\u90e8\u5206\u4ee3\u7801\uff0c\u5e76\u6307\u5b9a\u533a\u57df\u3002\u8bf7\u5728\u6240\u6709\u7c7b\u4e2d\u8fdb\u884c\u5982\u4e0b\u4fee\u6539\u3002<\/p>\n
        # host = \"http:\/\/localhost:8000\"\r\n<\/span>        region<\/span> =<\/span> 'ap-northeast-1'<\/span>\r\n<\/code><\/pre>\n
\u63a5\u4e0b\u6765\u6211\u4eec\u8981\u4fee\u6539 database.py\u3002
\n\u5728 app.py \u4e2d\u542f\u52a8\u5e94\u7528\u7a0b\u5e8f\u65f6\uff0c\u8fd9\u4e2a\u811a\u672c\u7528\u4e8e\u521d\u59cb\u5316\u6570\u636e\u5e93\u3002\u4f46\u662f\u7531\u4e8e\u4e0d\u80fd\u6210\u529f\u521b\u5efa DynamoDB\uff0c\u6216\u8005\u6bcf\u6b21\u542f\u52a8\u90fd\u4f1a\u6dfb\u52a0\u6570\u636e\uff0c\u9020\u6210\u4e00\u4e9b\u4e0d\u4fbf\u3002\u6240\u4ee5\u6211\u4eec\u5bf9\u5176\u8fdb\u884c\u4e86\u4fee\u6b63\u3002<\/p>\n
from<\/span> uuid<\/span> import<\/span> uuid4<\/span>\r\n\r\n\r\ndef<\/span> init_db<\/span>():<\/span>\r\n    # import all modules here that might define models so that\r\n<\/span>    # they will be registered properly on the metadata.  Otherwise\r\n<\/span>    # you will have to import them first before calling init_db()\r\n<\/span>    from<\/span> models<\/span> import<\/span> Department<\/span>,<\/span> Employee<\/span>,<\/span> Role<\/span>\r\n\r\n    if<\/span> not<\/span> Department<\/span>.<\/span>exists<\/span>():<\/span>\r\n        Department<\/span>.<\/span>create_table<\/span>(<\/span>read_capacity_units<\/span>=<\/span>1<\/span>,<\/span> write_capacity_units<\/span>=<\/span>1<\/span>,<\/span> wait<\/span>=<\/span>True<\/span>)<\/span>\r\n\r\n        engineering<\/span> =<\/span> Department<\/span>(<\/span>id<\/span>=<\/span>str<\/span>(<\/span>uuid4<\/span>()),<\/span> name<\/span>=<\/span>'Engineering'<\/span>)<\/span>\r\n        engineering<\/span>.<\/span>save<\/span>()<\/span>\r\n\r\n        hr<\/span> =<\/span> Department<\/span>(<\/span>id<\/span>=<\/span>str<\/span>(<\/span>uuid4<\/span>()),<\/span> name<\/span>=<\/span>'Human Resources'<\/span>)<\/span>\r\n        hr<\/span>.<\/span>save<\/span>()<\/span>\r\n\r\n    if<\/span> not<\/span> Role<\/span>.<\/span>exists<\/span>():<\/span>\r\n        Role<\/span>.<\/span>create_table<\/span>(<\/span>read_capacity_units<\/span>=<\/span>1<\/span>,<\/span> write_capacity_units<\/span>=<\/span>1<\/span>,<\/span> wait<\/span>=<\/span>True<\/span>)<\/span>\r\n\r\n        manager<\/span> =<\/span> Role<\/span>(<\/span>id<\/span>=<\/span>str<\/span>(<\/span>uuid4<\/span>()),<\/span> name<\/span>=<\/span>'manager'<\/span>)<\/span>\r\n        manager<\/span>.<\/span>save<\/span>()<\/span>\r\n\r\n        engineer<\/span> =<\/span> Role<\/span>(<\/span>id<\/span>=<\/span>str<\/span>(<\/span>uuid4<\/span>()),<\/span> name<\/span>=<\/span>'engineer'<\/span>)<\/span>\r\n        engineer<\/span>.<\/span>save<\/span>()<\/span>\r\n\r\n    if<\/span> not<\/span> Employee<\/span>.<\/span>exists<\/span>():<\/span>\r\n        Employee<\/span>.<\/span>create_table<\/span>(<\/span>read_capacity_units<\/span>=<\/span>1<\/span>,<\/span> write_capacity_units<\/span>=<\/span>1<\/span>,<\/span> wait<\/span>=<\/span>True<\/span>)<\/span>\r\n\r\n        peter<\/span> =<\/span> Employee<\/span>(<\/span>id<\/span>=<\/span>str<\/span>(<\/span>uuid4<\/span>()),<\/span> name<\/span>=<\/span>'Peter'<\/span>,<\/span> department<\/span>=<\/span>engineering<\/span>,<\/span> role<\/span>=<\/span>engineer<\/span>)<\/span>\r\n        peter<\/span>.<\/span>save<\/span>()<\/span>\r\n\r\n        roy<\/span> =<\/span> Employee<\/span>(<\/span>id<\/span>=<\/span>str<\/span>(<\/span>uuid4<\/span>()),<\/span> name<\/span>=<\/span>'Roy'<\/span>,<\/span> department<\/span>=<\/span>engineering<\/span>,<\/span> role<\/span>=<\/span>engineer<\/span>)<\/span>\r\n        roy<\/span>.<\/span>save<\/span>()<\/span>\r\n\r\n        tracy<\/span> =<\/span> Employee<\/span>(<\/span>id<\/span>=<\/span>str<\/span>(<\/span>uuid4<\/span>()),<\/span> name<\/span>=<\/span>'Tracy'<\/span>,<\/span> department<\/span>=<\/span>hr<\/span>,<\/span> role<\/span>=<\/span>manager<\/span>)<\/span>\r\n        tracy<\/span>.<\/span>save<\/span>()<\/span>\r\n\r\n<\/code><\/pre>\n
\u53ea\u9700\u8981\u4e00\u79cd\u9009\u9879\uff1a
\n\u5982\u679c\u5728\u5e94\u7528\u7a0b\u5e8f\u542f\u52a8\u65f6DynamoDB\u4e0d\u5b58\u5728\uff0c\u5219\u521b\u5efa\u5b83\u5e76\u586b\u5145\u793a\u4f8b\u6570\u636e\u3002 schema.py\u548capp.py\u4fdd\u6301\u4e0d\u53d8\u5c31\u53ef\u4ee5\u3002<\/p>\n
\u672c\u5730\u4ee3\u7801\u8fd0\u884c<\/h1>\n
\u6211\u5148\u5728\u672c\u5730\u8fdb\u884c\u6d4b\u8bd5\u6765\u770b\u770b\u662f\u5426\u53ef\u4ee5\u8fd0\u884c\u3002<\/p>\n
$ python app.py\r\n * Running on http:\/\/127.0.0.1:5000\/ (Press CTRL+C to quit)\r\n * Restarting with stat\r\n * Debugger is active!\r\n * Debugger PIN: 287-543-857\r\n<\/code><\/pre>\n
\u7531\u4e8e\u5728\u9996\u6b21\u542f\u52a8\u65f6\u9700\u8981\u521b\u5efaDynamoDB\u8868\uff0c\u56e0\u6b64\u542f\u52a8\u8fc7\u7a0b\u53ef\u80fd\u9700\u8981\u4e00\u4e9b\u65f6\u95f4\u3002<\/p>\n
\u8d77\u52a8\u540e\uff0c\u5c1d\u8bd5\u8bbf\u95ee http:\/\/127.0.0.1:5000\/graphql\u3002\u8fd9\u6837\u4f60\u5c31\u53ef\u4ee5\u901a\u8fc7\u4e00\u4e2a\u540d\u4e3aGraphiQL\u7684GUI\u754c\u9762\u6765\u8fdb\u884c\u67e5\u8be2\u64cd\u4f5c\u7684\u63a7\u5236\u53f0\u4e86\u3002<\/p>\n
\u56e0\u6b64\uff0c\u6211\u5011\u5c07\u5617\u8a66\u4ee5\u9019\u7a2e\u65b9\u5f0f\u767c\u51fa\u67e5\u8a62\u8acb\u6c42\u3002<\/p>\n
{\r\n  allEmployees {\r\n    edges {\r\n      node {\r\n        id,\r\n        name,\r\n        department {\r\n          id,\r\n          name\r\n        },\r\n        role {\r\n          id,\r\n          name\r\n        }\r\n      }\r\n    }\r\n  }\r\n}\r\n<\/code><\/pre>\n
\"\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8<\/div>\n
\u6211\u6210\u529f\u5730\u67e5\u8be2\u4e86DynamoDB\u4e2d\u7684\u6240\u6709\u6570\u636e\u3002\u5982\u679c\u5c1d\u8bd5\u5220\u9664id\u548cname\u7b49\u5b57\u6bb5\uff0c\u6211\u8ba4\u4e3a\u53ea\u80fd\u83b7\u53d6\u5230\u67e5\u8be2\u8bed\u53e5\u4e2d\u63d0\u53ca\u7684\u5185\u5bb9\u3002<\/p>\n
\u65e0\u670d\u52a1\u5668\u5316<\/h1>\n
\u73b0\u5728\u672c\u5730\u6b63\u5728\u8fd0\u884cFlask\u670d\u52a1\u5668\uff0c\u6211\u5c06\u5c1d\u8bd5\u7528Zappa\u8fdb\u884c\u90e8\u7f72\u5e76\u5b9e\u73b0\u65e0\u670d\u52a1\u5668\u5316\u3002<\/p>\n
$ pip install zappa\r\n<\/code><\/pre>\n
$ zappa init\r\n<\/code><\/pre>\n
\u867d\u7136\u6709\u5f88\u591a\u95ee\u9898\uff0c\u4f46\u5982\u679c\u5728\u51ed\u636e\u914d\u7f6e\u6587\u4ef6\u4e2d\u4f7f\u7528\u9ed8\u8ba4\u8bbe\u7f6e\uff0c\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u90fd\u53ef\u4ee5\u76f4\u63a5\u6309\u56de\u8f66\u952e\uff0c\u5e94\u8be5\u4e0d\u4f1a\u6709\u95ee\u9898\u3002<\/p>\n
\u90e8\u7f72<\/h3>\n
\u786e\u8ba4 zappa_settings.json \u5df2\u7ecf\u521b\u5efa\u5b8c\u6210\u540e\uff0c\u8fdb\u884c\u90e8\u7f72\u3002<\/p>\n
$ zappa deploy\r\n\r\n\u30fb\u30fb\u30fb\r\n\r\nDeployment complete!: https:\/\/xxxxxxxxxx.execute-api.ap-northeast-1.amazonaws.com\/dev\r\n<\/code><\/pre>\n
\u751f\u6210\u7684\u7aef\u70b9+\/graphql\u5c06\u53d8\u6210GraphQL\u7aef\u70b9\u3002<\/p>\n
\u786e\u8ba4<\/h3>\n
\u4e3a\u4e86\u786e\u8ba4\uff0c\u6211\u4f1a\u901a\u8fc7Chrome\u6269\u5c55\u7b49\u9014\u5f84\u8fdb\u884c\u67e5\u8be2\u3002
\n\u6211\u4f7f\u7528chromeiql\u3002\u5f53\u6211\u4e0b\u8f7d\u5e76\u6253\u5f00Chrome\u540e\uff0c\u4f1a\u51fa\u73b0\u4e00\u4e2a\u540d\u4e3a\u201cSet endpoint\u201d\u7684\u6587\u672c\u6846\uff0c\u6211\u5728\u90a3\u91cc\u8f93\u5165GraphQL\u7684\u7aef\u70b9\u3002
\n\u7aef\u70b9\u770b\u8d77\u6765\u662f\u8fd9\u6837\u7684\u3002
\nhttps:\/\/xxxxxxxxxx.execute-api.ap-northeast-1.amazonaws.com\/dev\/graphql<\/p>\n
\u5f53\u8bbe\u7f6e\u7ec8\u70b9\u65f6\uff0c\u5c06\u663e\u793aGraphiQL\u63a7\u5236\u53f0\u754c\u9762\uff0c\u4e0e\u4e4b\u524d\u76f8\u540c\u3002<\/p>\n
\"\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8<\/div>\n
\u5f53\u4f60\u5728\u5de6\u8fb9\u4f4d\u7f6e\u8f93\u5165\u4e4b\u524d\u5728\u672c\u5730\u786e\u8ba4\u8fc7\u7684\u67e5\u8be2\u5e76\u8fd0\u884c\uff0c\u6211\u60f3\u4f60\u4f1a\u5f97\u5230\u7c7b\u4f3c\u7684\u7ed3\u679c\u3002<\/p>\n
\u7559\u5fc3<\/h3>\n
\u5f53\u6211\u5728\u672c\u5730\u6d4b\u8bd5\u65f6\uff0c\u6211\u4f1a\u5728Flask\u542f\u52a8\u65f6\u68c0\u67e5\u662f\u5426\u5b58\u5728DynamoDB\u8868\uff0c\u5982\u679c\u4e0d\u5b58\u5728\uff0c\u5c31\u521b\u5efa\u4e00\u4e2a\u3002\u7136\u800c\uff0c\u5728\u8f6c\u4e3a\u65e0\u670d\u52a1\u5668\u540e\uff0c\u5b83\u4e0d\u4f1a\u5904\u7406\u8fd9\u4e2a\u6b65\u9aa4\uff0c\u6240\u4ee5\u5982\u679c\u8868\u4e0d\u5b58\u5728\uff0c\u5c31\u9700\u8981\u81ea\u5df1\u521b\u5efa\u3002\u7531\u4e8e\u6211\u5c06\u672c\u5730\u521b\u5efa\u7684\u8868\u4ece\u65e0\u670d\u52a1\u5668\u5e94\u7528\u7a0b\u5e8f\u4e2d\u91cd\u65b0\u4f7f\u7528\uff0c\u6240\u4ee5\u6211\u8ba4\u4e3a\u8fd9\u6ca1\u6709\u95ee\u9898\u3002<\/p>\n
\u8d44\u6e90\u5220\u9664\u4f7f\u7528 $ zappa undeploy\u3002<\/p>\n
\u603b\u7ed3<\/h1>\n
\u7528Zappa\u53ef\u4ee5\u5c06\u539f\u672c\u5728Flask\u4e0a\u8fd0\u884c\u7684\u5e94\u7528\u7a0b\u5e8f\u76f4\u63a5\u90e8\u7f72\u4e3a\u65e0\u670d\u52a1\u5668\u5e94\u7528\uff0c\u8fd9\u771f\u662f\u592a\u5389\u5bb3\u4e86\uff01<\/p>\n
AppSync\uff5e\uff5e\uff5e\uff5e\uff5e\uff01\uff01\uff01 (\u540c\u6b65\u5e94\u7528)<\/p>\n","protected":false},"excerpt":{"rendered":"
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