{"id":205157,"date":"2025-05-29T17:17:24","date_gmt":"2025-05-29T09:17:24","guid":{"rendered":"https:\/\/server.hk\/cnblog\/205157\/"},"modified":"2025-05-29T17:17:24","modified_gmt":"2025-05-29T09:17:24","slug":"flask-sqlalchemy-%e6%9f%a5%e8%af%a2%e7%bb%93%e6%9e%9c%e5%a6%82%e4%bd%95%e8%bd%ac%e6%8d%a2%e4%b8%ba-json%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/205157\/","title":{"rendered":"Flask-SQLAlchemy \u67e5\u8be2\u7ed3\u679c\u5982\u4f55\u8f6c\u6362\u4e3a JSON\uff1f"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>Flask-SQLAlchemy \u67e5\u8be2\u7ed3\u679c\u5982\u4f55\u8f6c\u6362\u4e3a JSON\uff1f<\/h1>\n<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241124\/173245685167433193064c9.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>python sqlalchemy \u67e5\u8be2\u7ed3\u679c\u5982\u4f55\u8f6c\u6362\u4e3a json\uff1f<\/strong><\/p>\n<p>\u5bf9\u4e8e\u5728 flask \u4e2d\u4f7f\u7528 flask-sqlalchemy \u65f6\u9047\u5230\u7684\u65e0\u6cd5\u901a\u8fc7\u5b98\u65b9\u65b9\u5f0f\u5c06\u67e5\u8be2\u7ed3\u679c\u8f6c\u6362\u4e3a json \u7684\u95ee\u9898\uff0c\u4ee5\u4e0b\u662f\u4e00\u4e9b\u89e3\u51b3\u65b9\u6848\uff1a<\/p>\n<p><strong>\u4f7f\u7528 peewee\uff08\u63a8\u8350\uff09<\/strong><\/p>\n<p>peewee \u662f\u4e00\u4e2a\u7b80\u5355\u7684 orm \u5e93\uff0c\u5b83\u63d0\u4f9b\u4e86\u4fbf\u6377\u7684\u65b9\u6cd5\u6765\u5904\u7406\u6570\u636e\u5e93\u5bf9\u8c61\u3002\u5bf9\u4e8e\u5c06\u5bf9\u8c61\u8f6c\u6362\u4e3a\u5b57\u5178\uff0c\u53ef\u4ee5\u4f7f\u7528\u5176 model_to_dict \u51fd\u6570\uff1a<\/p>\n<pre>from playhouse.shortcuts import model_to_dict\n\n# \u4f7f\u7528 model_to_dict \u5c06\u5bf9\u8c61\u8f6c\u6362\u4e3a\u5b57\u5178\nresult_dict = model_to_dict(query_result)<\/pre>\n<p>\u8bf7\u6ce8\u610f\uff0cpeewee \u968f playhouse \u5b89\u88c5\uff0c\u65e0\u9700\u5355\u72ec\u5b89\u88c5\u3002<\/p>\n<p><strong>\u5176\u4ed6\u63d2\u4ef6<\/strong><\/p>\n<p>\u5982\u679c\u60a8\u4e0d\u60f3\u4f7f\u7528 peewee\uff0c\u8fd8\u6709\u5176\u4ed6\u63d2\u4ef6\u53ef\u4ee5\u5e2e\u52a9\u60a8\u5b9e\u73b0\u8fd9\u4e00\u529f\u80fd\uff1a<\/p>\n<ul>\n<li><strong>sqlalchemy-utils<\/strong>\uff1a\u63d0\u4f9b\u4e86\u4e00\u4e2a to_json \u65b9\u6cd5\uff0c\u53ef\u4ee5\u5c06\u5bf9\u8c61\u8f6c\u6362\u4e3a json\u3002<\/li>\n<li><strong>marshmallow-sqlalchemy<\/strong>\uff1a\u4e00\u4e2a\u7528\u4e8e\u5e8f\u5217\u5316\u548c\u53cd\u5e8f\u5217\u5316\u7684\u5e93\uff0c\u652f\u6301 sqlalchemy \u6a21\u578b\u3002<\/li>\n<\/ul>\n<p><strong>\u4f7f\u7528\u65b9\u6cd5<\/strong><\/p>\n<p>\u5b89\u88c5\u6240\u9700\u7684\u63d2\u4ef6\u540e\uff0c\u60a8\u53ef\u4ee5\u6309\u7167\u4ee5\u4e0b\u6b65\u9aa4\u5c06 sqlalchemy \u67e5\u8be2\u7ed3\u679c\u8f6c\u6362\u4e3a json\uff1a<\/p>\n<ol>\n<li>\u5bfc\u5165\u63d2\u4ef6\u7684 to_json \u6216 serialize \u51fd\u6570\u3002<\/li>\n<li>\u4f7f\u7528\u8be5\u51fd\u6570\u5c06\u67e5\u8be2\u7ed3\u679c\u8f6c\u6362\u4e3a\u5b57\u5178\u3002<\/li>\n<li>\u4f7f\u7528 json.dumps() \u51fd\u6570\u5c06\u5b57\u5178\u8f6c\u6362\u4e3a json \u5b57\u7b26\u4e32\u3002<\/li>\n<\/ol>\n<p>\u4f8b\u5982\uff0c\u4f7f\u7528 sqlalchemy-utils\uff1a<\/p>\n<pre>from sqlalchemy_utils import to_json\n\n# \u4f7f\u7528 to_json \u5c06 SQLAlchemy \u5bf9\u8c61\u8f6c\u6362\u4e3a JSON\njson_string = to_json(query_result)<\/pre>\n<p>\u4ee5\u4e0a\u5c31\u662f\u672c\u6587\u7684\u5168\u90e8\u5185\u5bb9\u4e86\uff0c\u662f\u5426\u6709\u987a\u5229\u5e2e\u52a9\u4f60\u89e3\u51b3\u95ee\u9898\uff1f\u82e5\u662f\u80fd\u7ed9\u4f60\u5e26\u6765\u5b66\u4e60\u4e0a\u7684\u5e2e\u52a9\uff0c\u8bf7\u5927\u5bb6\u591a\u591a\u652f\u6301\uff01\u66f4\u591a\u5173\u4e8e\u6587\u7ae0\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u4e5f\u53ef\u5173\u6ce8\u516c\u4f17\u53f7\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Flask-SQLAlchemy&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-205157","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/205157","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=205157"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/205157\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=205157"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=205157"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=205157"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}