{"id":60251,"date":"2024-10-13T01:18:18","date_gmt":"2024-10-12T17:18:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/60251\/"},"modified":"2024-10-13T01:18:18","modified_gmt":"2024-10-12T17:18:18","slug":"dataset%e5%9f%ba%e6%96%bcsqlalchemy%e7%9a%84%e4%be%bf%e5%88%a9%e5%b7%a5%e5%85%b7","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/60251\/","title":{"rendered":"Dataset\u57fa\u65bcSQLAlchemy\u7684\u4fbf\u5229\u5de5\u5177"},"content":{"rendered":"<h1 id=\"dataset%e5%9f%ba%e6%96%bcsqlalchemy%e7%9a%84%e4%be%bf%e5%88%a9%e5%b7%a5%e5%85%b7-YZytDNrGlo\">Dataset\u57fa\u65bcSQLAlchemy\u7684\u4fbf\u5229\u5de5\u5177<\/h1>\n<p>\u5728\u7576\u4eca\u6578\u64da\u9a45\u52d5\u7684\u4e16\u754c\u4e2d\uff0c\u6578\u64da\u7684\u7ba1\u7406\u548c\u64cd\u4f5c\u8b8a\u5f97\u8d8a\u4f86\u8d8a\u91cd\u8981\u3002SQLAlchemy\u4f5c\u70ba\u4e00\u500b\u5f37\u5927\u7684Python ORM\uff08\u5c0d\u8c61\u95dc\u4fc2\u6620\u5c04\uff09\u5de5\u5177\uff0c\u70ba\u958b\u767c\u8005\u63d0\u4f9b\u4e86\u9748\u6d3b\u7684\u6578\u64da\u5eab\u64cd\u4f5c\u65b9\u5f0f\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5229\u7528SQLAlchemy\u4f86\u7c21\u5316\u6578\u64da\u96c6\u7684\u7ba1\u7406\uff0c\u4e26\u4ecb\u7d39\u4e00\u4e9b\u5be6\u7528\u7684\u5de5\u5177\u548c\u6280\u5de7\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%afsqlalchemy%ef%bc%9f-YZytDNrGlo\">\u4ec0\u9ebc\u662fSQLAlchemy\uff1f<\/h2>\n<p>SQLAlchemy\u662f\u4e00\u500bPython SQL\u5de5\u5177\u5305\u548cORM\uff0c\u65e8\u5728\u63d0\u4f9b\u4e00\u500b\u9ad8\u6548\u4e14\u9748\u6d3b\u7684\u6578\u64da\u5eab\u64cd\u4f5c\u63a5\u53e3\u3002\u5b83\u652f\u6301\u591a\u7a2e\u6578\u64da\u5eab\uff0c\u5305\u62ecMySQL\u3001PostgreSQL\u3001SQLite\u7b49\uff0c\u4e26\u4e14\u80fd\u5920\u8b93\u958b\u767c\u8005\u4ee5Python\u5c0d\u8c61\u7684\u65b9\u5f0f\u4f86\u64cd\u4f5c\u6578\u64da\u5eab\u4e2d\u7684\u6578\u64da\u3002<\/p>\n<h2 id=\"%e7%82%ba%e4%bb%80%e9%ba%bc%e9%81%b8%e6%93%87sqlalchemy%ef%bc%9f-YZytDNrGlo\">\u70ba\u4ec0\u9ebc\u9078\u64c7SQLAlchemy\uff1f<\/h2>\n<ul>\n<li><strong>\u9748\u6d3b\u6027\uff1a<\/strong>SQLAlchemy\u5141\u8a31\u958b\u767c\u8005\u4f7f\u7528\u539f\u751fSQL\u8a9e\u53e5\u6216ORM\u65b9\u5f0f\u9032\u884c\u6578\u64da\u64cd\u4f5c\uff0c\u6839\u64da\u9700\u6c42\u9078\u64c7\u6700\u5408\u9069\u7684\u65b9\u5f0f\u3002<\/li>\n<li><strong>\u53ef\u64f4\u5c55\u6027\uff1a<\/strong>\u5176\u67b6\u69cb\u8a2d\u8a08\u4f7f\u5f97SQLAlchemy\u53ef\u4ee5\u8f15\u9b06\u64f4\u5c55\uff0c\u652f\u6301\u591a\u7a2e\u6578\u64da\u5eab\u548c\u81ea\u5b9a\u7fa9\u6578\u64da\u985e\u578b\u3002<\/li>\n<li><strong>\u793e\u5340\u652f\u6301\uff1a<\/strong>\u4f5c\u70ba\u4e00\u500b\u6d41\u884c\u7684\u958b\u6e90\u9805\u76ee\uff0cSQLAlchemy\u64c1\u6709\u6d3b\u8e8d\u7684\u793e\u5340\u548c\u8c50\u5bcc\u7684\u6587\u6a94\uff0c\u65b9\u4fbf\u958b\u767c\u8005\u67e5\u8a62\u548c\u5b78\u7fd2\u3002<\/li>\n<\/ul>\n<h2 id=\"%e4%bd%bf%e7%94%a8sqlalchemy%e9%80%b2%e8%a1%8c%e6%95%b8%e6%93%9a%e9%9b%86%e7%ae%a1%e7%90%86-YZytDNrGlo\">\u4f7f\u7528SQLAlchemy\u9032\u884c\u6578\u64da\u96c6\u7ba1\u7406<\/h2>\n<p>\u5728\u4f7f\u7528SQLAlchemy\u9032\u884c\u6578\u64da\u96c6\u7ba1\u7406\u6642\uff0c\u9996\u5148\u9700\u8981\u5b89\u88ddSQLAlchemy\u5eab\u3002\u53ef\u4ee5\u901a\u904e\u4ee5\u4e0b\u547d\u4ee4\u9032\u884c\u5b89\u88dd\uff1a<\/p>\n<pre><code>pip install SQLAlchemy<\/code><\/pre>\n<h3 id=\"%e5%bb%ba%e7%ab%8b%e6%95%b8%e6%93%9a%e5%ba%ab%e9%80%a3%e6%8e%a5-YZytDNrGlo\">\u5efa\u7acb\u6578\u64da\u5eab\u9023\u63a5<\/h3>\n<p>\u9996\u5148\uff0c\u6211\u5011\u9700\u8981\u5efa\u7acb\u8207\u6578\u64da\u5eab\u7684\u9023\u63a5\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u9023\u63a5\u5230SQLite\u6578\u64da\u5eab\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>from sqlalchemy import create_engine\n\n# \u5efa\u7acb\u6578\u64da\u5eab\u5f15\u64ce\nengine = create_engine('sqlite:\/\/\/example.db')\n<\/code><\/pre>\n<h3 id=\"%e5%ae%9a%e7%be%a9%e6%95%b8%e6%93%9a%e6%a8%a1%e5%9e%8b-YZytDNrGlo\">\u5b9a\u7fa9\u6578\u64da\u6a21\u578b<\/h3>\n<p>\u63a5\u4e0b\u4f86\uff0c\u6211\u5011\u9700\u8981\u5b9a\u7fa9\u6578\u64da\u6a21\u578b\u3002\u9019\u53ef\u4ee5\u901a\u904e\u5275\u5efa\u4e00\u500bPython\u985e\u4f86\u5be6\u73fe\uff0c\u4e26\u4f7f\u7528SQLAlchemy\u7684\u57fa\u985e\u9032\u884c\u7e7c\u627f\uff1a<\/p>\n<pre><code>from sqlalchemy.ext.declarative import declarative_base\nfrom sqlalchemy import Column, Integer, String\n\nBase = declarative_base()\n\nclass User(Base):\n    __tablename__ = 'users'\n    \n    id = Column(Integer, primary_key=True)\n    name = Column(String)\n    age = Column(Integer)\n<\/code><\/pre>\n<h3 id=\"%e5%89%b5%e5%bb%ba%e6%95%b8%e6%93%9a%e8%a1%a8-YZytDNrGlo\">\u5275\u5efa\u6578\u64da\u8868<\/h3>\n<p>\u5b9a\u7fa9\u5b8c\u6578\u64da\u6a21\u578b\u5f8c\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u78bc\u5275\u5efa\u6578\u64da\u8868\uff1a<\/p>\n<pre><code>Base.metadata.create_all(engine)\n<\/code><\/pre>\n<h3 id=\"%e6%8f%92%e5%85%a5%e6%95%b8%e6%93%9a-YZytDNrGlo\">\u63d2\u5165\u6578\u64da<\/h3>\n<p>\u63d2\u5165\u6578\u64da\u53ef\u4ee5\u901a\u904e\u5275\u5efa\u4e00\u500b\u6703\u8a71\u4f86\u5be6\u73fe\uff1a<\/p>\n<pre><code>from sqlalchemy.orm import sessionmaker\n\nSession = sessionmaker(bind=engine)\nsession = Session()\n\n# \u5275\u5efa\u4e00\u500b\u65b0\u7528\u6236\nnew_user = User(name='Alice', age=30)\nsession.add(new_user)\nsession.commit()\n<\/code><\/pre>\n<h3 id=\"%e6%9f%a5%e8%a9%a2%e6%95%b8%e6%93%9a-YZytDNrGlo\">\u67e5\u8a62\u6578\u64da<\/h3>\n<p>\u67e5\u8a62\u6578\u64da\u540c\u6a23\u7c21\u55ae\uff0c\u4ee5\u4e0b\u662f\u67e5\u8a62\u6240\u6709\u7528\u6236\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>users = session.query(User).all()\nfor user in users:\n    print(user.name, user.age)\n<\/code><\/pre>\n<h2 id=\"%e7%b5%90%e8%ab%96-YZytDNrGlo\">\u7d50\u8ad6<\/h2>\n<p>SQLAlchemy\u4f5c\u70ba\u4e00\u500b\u5f37\u5927\u7684\u6578\u64da\u5eab\u64cd\u4f5c\u5de5\u5177\uff0c\u70ba\u958b\u767c\u8005\u63d0\u4f9b\u4e86\u9748\u6d3b\u4e14\u9ad8\u6548\u7684\u6578\u64da\u96c6\u7ba1\u7406\u65b9\u5f0f\u3002\u7121\u8ad6\u662f\u5efa\u7acb\u6578\u64da\u6a21\u578b\u3001\u5275\u5efa\u6578\u64da\u8868\uff0c\u9084\u662f\u9032\u884c\u6578\u64da\u7684\u63d2\u5165\u548c\u67e5\u8a62\uff0cSQLAlchemy\u90fd\u80fd\u5920\u7c21\u5316\u9019\u4e9b\u904e\u7a0b\uff0c\u63d0\u5347\u958b\u767c\u6548\u7387\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u7a69\u5b9a\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u904b\u884c\u60a8\u7684\u61c9\u7528\u7a0b\u5e8f\uff0cServer.HK\u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u9700\u6c42\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u9084\u662f\u5176\u4ed6\u985e\u578b\u7684 <a href=\"https:\/\/server.hk\">\u4f3a\u670d\u5668<\/a>\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22Dataset\uff0c\u4e00\u6b3e\u57fa\u65bcSQLAlchemy\u7684\u4fbf\u5229\u5de5\u5177\uff0c\u7c21\u5316\u6578\u64da\u64cd\u4f5c\uff0c\u63d0\u5347\u958b\u767c\u6548\u7387\uff0c\u8f15\u9b06\u7ba1\u7406\u548c\u67e5\u8a62\u6578\u64da\u5eab\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-60251","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60251","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=60251"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60251\/revisions"}],"predecessor-version":[{"id":60252,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60251\/revisions\/60252"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=60251"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=60251"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=60251"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}