{"id":124593,"date":"2020-06-26T22:52:16","date_gmt":"2020-06-26T14:52:16","guid":{"rendered":"http:\/\/4563.org\/?p=124593"},"modified":"2020-06-26T22:52:16","modified_gmt":"2020-06-26T14:52:16","slug":"%e8%af%b7%e6%95%99-sqlalchemy%ef%bc%8c%e5%a6%82%e4%bd%95%e6%a0%b9%e6%8d%ae%e6%98%a0%e5%b0%84%e7%b1%bb%e5%ae%9a%e4%b9%89%e5%8e%bb%e5%88%9b%e5%bb%ba%e8%a1%a8%ef%bc%9f","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=124593","title":{"rendered":"\u8bf7\u6559 sqlalchemy\uff0c\u5982\u4f55\u6839\u636e\u6620\u5c04\u7c7b\u5b9a\u4e49\u53bb\u521b\u5efa\u8868\uff1f"},"content":{"rendered":"
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\u8bf7\u6559 sqlalchemy\uff0c\u5982\u4f55\u6839\u636e\u6620\u5c04\u7c7b\u5b9a\u4e49\u53bb\u521b\u5efa\u8868\uff1f <\/h1>\n

<\/p>\n

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\u8cc7\u6df1\u5927\u4f6c : qazwsxkevin <\/span> <\/i> 7<\/span> <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n
<\/p>\n

\u5982\uff1a<\/p>\n

Base = declarative_base() engine = create_engine(\"mysql+pymysql:\/\/root:[email protected]:3306\/MTData?charset=utf8\", echo=False) Session = sessionmaker(bind=engine)         session = Session() metadata = MetaData(engine)  class tbl_mtLive(Base):     __tablename__ = 'mtLive'      id = Column(INTEGER(64), primary_key=True)     timeline = Column(SMALLINT())     mtuptime = Column(SMALLINT())     mttext = Column(String(500))     mtstatus = Column(String(25))     Strtime = Column(String(25))     fixStrtime = Column(DateTime)     mtid = Column(String(10))     UpdateTime = Column(DateTime)     SQLTAG = Column(String(20))   <\/code><\/pre>\n
MTData \u5e93\u91cc\u9762,\u9664\u4e86 mtLive \u8fd8\u6709 N \u5f20\u8868\uff0c
 \u6709\u4e9b\u5df2\u7ecf\u50cf class tbl_mtLive(Base)\u8fd9\u6837\u201c\u6620\u5c04\u7c7b\u5b9a\u4e49\u201d\u4e86\uff0c
 \u6709\u4e9b\u5219\u6ca1\u6709\uff0c<\/p>\n
\u8bf7\u6559\u5927\u5bb6\u7b2c\u4e00\u4e2a\u95ee\u9898\u662f\uff1a\u5982\u679c mtLive \u8fd9\u4e2a\u8868\u5e76\u6ca1\u6709\u5efa\u7acb\uff0c\u4e0a\u9762\u8fd9\u79cd ORM \u7684\u524d\u63d0\u4e0b\uff0c\u5982\u4f55\u4ee5 class tbl_mtLive \u53bb\u521b\u5efa\u8868\uff1f sqlalchemy \u7684\u6587\u6863\u770b\u5f97\u773c\u90fd\u82b1\u4e86\u3002\u3002\u3002-_-<\/p>\n
\u7b2c\u4e8c\u4e2a\u95ee\u9898\u662f\uff1a \u60f3\u6cd5\u662f\u6253\u7b97\u628a\u5e93\u91cc\u9762\u7684\u5168\u90e8\u8868\u505a\u4e00\u4e2a\u5386\u904d\uff0c
 \u53bb\u6267\u884c<\/p>\n
for i in #\u8fd9\u4e2a\u8868\u96c6\u5408\u5982\u4f55\u83b7\u53d6\uff1f#     session.execute(f\"update {i} set `{k}`='{v[0]}' where mtid = '{i.get('mtid')}' AND timeline = '{i.get('timeline')}'\")     # \u66f4\u65b0 UpdateTime     session.execute(f\"update {i} set `UpdateTime`='{ProcFixTime()}' where mtid = '{i.get('mtid')}' AND timeline = '{i.get('timeline')}'\") <\/code><\/pre>\n
\u770b\u4e86\u7f51\u4e0a\u7684\u4f8b\u5b50\uff0c\u6587\u6863\u548c\u7f51\u4e0a\u6709\u5f88\u591a\u7684\u4f8b\u5b50\u662f\u7528.cursors\uff0c.execute()\u6267\u884c\u4e86 SQL \u8bed\u53e5\uff0c\u7528.fetchall()\u7684\u65b9\u83b7\u53d6\u5230\u8868\u540d\uff0c\u7136\u540e\u5f00\u59cb do something \u7684\uff0c<\/p>\n
\u8bf7\u95ee ORM \u65b9\u5f0f\u662f\u5426\u6709\u65b9\u6cd5\u53ef\u4ee5\u5b9e\u73b0\uff1f\u5982\u4f55\u505a\uff1f<\/p>\n
\u5c3d\u7ba1\u5728\u8349\u62df\u8fd9\u4e2a\u5e16\u5b50\u7684\u524d 1 \u5c0f\u65f6\uff0c\u5df2\u7ecf\u5b9e\u73b0
 tables = Base.metadata.tables
 print(tables)
 \u83b7\u5f97\u4e86\u8868\u540d\uff0c\u4f3c\u4e4e\u89c9\u5f97\u8fd9\u6837\u64cd\u4f5c\u4e0d\u662f\u597d\u529e\u6cd5\u3002\u3002\u3002<\/p>\n<\/p><\/div>\n
 \u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (2<\/span>)        <\/div>\n
 <\/div>\n<\/p><\/div>\n<\/p><\/div>\n
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     \u8cc7\u6df1\u5927\u4f6c : gjquoiai <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u5176\u5b9e\u6ca1\u592a\u770b\u61c2\u3002\u3002\u7b2c\u4e00\u4e2a\u95ee\u9898\u5e94\u8be5\u662f Base.metadata.create_all()\uff1f\u7b2c\u4e8c\u4e2a\u95ee\u9898\u53ef\u80fd\u53ef\u4ee5\u7528 automap                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : myCupOfTea <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u7b2c\u4e8c\u4e2a\u95ee\u9898\u76f4\u63a5\u7528 automap \u554a                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n","protected":false},"excerpt":{"rendered":"
    \u8bf7\u6559 sqlalchemy\uff0c\u5982\u4f55\u6839…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/124593"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=124593"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/124593\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=124593"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=124593"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=124593"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}