{"id":41907,"date":"2023-08-03T06:07:07","date_gmt":"2023-10-05T03:24:51","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/flask%e5%92%8cpostgresql%e6%9c%8d%e5%8a%a1%e5%99%a8%e7%9a%84%e8%bf%9e%e6%8e%a5%e8%ae%b0%e5%bd%95\/"},"modified":"2024-04-30T16:43:36","modified_gmt":"2024-04-30T08:43:36","slug":"flask%e5%92%8cpostgresql%e6%9c%8d%e5%8a%a1%e5%99%a8%e7%9a%84%e8%bf%9e%e6%8e%a5%e8%ae%b0%e5%bd%95","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/flask%e5%92%8cpostgresql%e6%9c%8d%e5%8a%a1%e5%99%a8%e7%9a%84%e8%bf%9e%e6%8e%a5%e8%ae%b0%e5%bd%95\/","title":{"rendered":"Flask\u548cPostgreSQL\u670d\u52a1\u5668\u7684\u8fde\u63a5\u8bb0\u5f55"},"content":{"rendered":"

\u521b\u5efa\u73af\u5883<\/h1>\n
# \u4eee\u60f3\u74b0\u5883\u306e\u4f5c\u6210 + activate<\/span>\r\n$ <\/span>python -m<\/span> venv flask_to_postgresql\r\n$ <\/span>cd <\/span>flask_to_postgresql\/Scripts\r\n$ <\/span>.\/activate\r\n\r\n# \u5fc5\u8981\u306a\u30d1\u30c3\u30b1\u30fc\u30b8\u53d6\u5f97<\/span>\r\n$ <\/span>python -m<\/span> pip install<\/span> --upgrade<\/span> pip\r\n$ <\/span>pip install <\/span>flask psycopg2-binary\r\n\r\n# \u74b0\u5883\u78ba\u8a8d<\/span>\r\n$ <\/span>python --version<\/span>\r\nPython 3.9.13\r\n$ <\/span>pip list\r\nPackage            Version\r\n------------------<\/span> -------<\/span>\r\nclick              8.1.3\r\ncolorama           0.4.6\r\nFlask              2.2.2\r\nimportlib-metadata 5.1.0\r\nitsdangerous       2.1.2\r\nJinja2             3.1.2\r\nMarkupSafe         2.1.1\r\npip                22.3.1\r\npsycopg2-binary    2.9.5\r\nsetuptools         58.1.0\r\nWerkzeug           2.2.2\r\nzipp               3.11.0\r\n<\/code><\/pre>\n
psycopg2-binary\u662f\u7528\u4e8e\u8fde\u63a5PostgreSQL\u670d\u52a1\u5668\u7684\u8f6f\u4ef6\u5305\u3002<\/p>\n
\u8bf7\u53c2\u8003\u4ee5\u4e0b\u7f51\u7ad9\u3002<\/h1>\n
    Flask\u304b\u3089PostgreSQL\u3092\u4f7f\u7528 via \u9ad8\u672c\u6280\u8853\u58eb\u4e8b\u52d9\u6240<\/ul>\n
    \u8f68\u8ff9<\/h1>\n
    from<\/span> flask<\/span> import<\/span> Flask<\/span>,<\/span> render_template<\/span>\r\nimport<\/span> psycopg2<\/span>\r\nimport<\/span> psycopg2.extras<\/span>\r\n\r\n# Flask\u4f5c\u6210\r\n<\/span>app<\/span> =<\/span> Flask<\/span>(<\/span>__name__<\/span>)<\/span>\r\n\r\n# ~\/ \u306b\u30a2\u30af\u30bb\u30b9\u3057\u305f\u969b\u306b\u8868\u793a\u3059\u308b\u3082\u306e\r\n<\/span>@app.route<\/span>(<\/span>'<\/span>\/<\/span>'<\/span>)<\/span>\r\ndef<\/span> index<\/span>():<\/span>\r\n    \"\"\"<\/span>_summary_\r\n    \u5f93\u696d\u54e1\u30ea\u30b9\u30c8\u3092\u8868\u793a\r\n    <\/span>\"\"\"<\/span>\r\n    # PostgreSQL Server\u3068\u306e\u63a5\u7d9a\u3092\u5b9a\u7fa9\r\n<\/span>    conn<\/span> =<\/span> psycopg2<\/span>.<\/span>connect<\/span>(<\/span>\r\n        host<\/span>=<\/span>'<\/span>localhost<\/span>'<\/span>,<\/span>\r\n        port<\/span>=<\/span>5432<\/span>,<\/span>\r\n        database<\/span>=<\/span>'<\/span>test<\/span>'<\/span>,<\/span>\r\n        user<\/span>=<\/span>'<\/span>testuser<\/span>'<\/span>,<\/span>\r\n        password<\/span>=<\/span>'<\/span>testpassword<\/span>'<\/span>,<\/span>\r\n    )<\/span>\r\n\r\n    # PostgreSQL Server\u3068\u63a5\u7d9a\u3092\u4f5c\u6210\r\n<\/span>    cur<\/span> =<\/span> conn<\/span>.<\/span>cursor<\/span>(<\/span>cursor_factory<\/span>=<\/span>psycopg2<\/span>.<\/span>extras<\/span>.<\/span>DictCursor<\/span>)<\/span>\r\n    # SQL\u3092\u6295\u5165\u3057\u3066\u60c5\u5831\u53d6\u5f97\r\n<\/span>    cur<\/span>.<\/span>execute<\/span>(<\/span>'<\/span>select * from employee order by employee_id<\/span>'<\/span>)<\/span>\r\n    # \u7d50\u679c\u3092\u53d6\u5f97\r\n<\/span>    employee_list<\/span> =<\/span> cur<\/span>.<\/span>fetchall<\/span>()<\/span>\r\n    # \u63a5\u7d9a\u7d42\u4e86\r\n<\/span>    conn<\/span>.<\/span>close<\/span>()<\/span>\r\n\r\n    # \u30c7\u30fc\u30bf\u3092html\u306b\u6e21\u3057\u3066\u8868\u793a\r\n<\/span>    return<\/span> render_template<\/span>(<\/span>\r\n        '<\/span>flask_to_postgresql.html<\/span>'<\/span>,<\/span>\r\n        title<\/span>=<\/span>'<\/span>Flask PostgreSQL<\/span>'<\/span>,<\/span>\r\n        dataset<\/span>=<\/span>employee_list<\/span>\r\n    )<\/span>\r\n\r\nif<\/span> __name__<\/span> ==<\/span> '<\/span>__main__<\/span>'<\/span>:<\/span>\r\n    # \u30c7\u30d0\u30c3\u30b0\u51fa\u529b\u3092\u6709\u52b9\u5316\r\n<\/span>    app<\/span>.<\/span>debug<\/span> =<\/span> True<\/span>\r\n    # app\u3092\u5b9f\u884c(\u30eb\u30fc\u30d7\u30d0\u30c3\u30af\u30a2\u30c9\u30ec\u30b9 + 80\u756a\u30dd\u30fc\u30c8)\r\n<\/span>    app<\/span>.<\/span>run<\/span>(<\/span>host<\/span>=<\/span>'<\/span>127.0.0.1<\/span>'<\/span>,<\/span> port<\/span>=<\/span>80<\/span>)<\/span>\r\n<\/code><\/pre>\n
    <!DOCTYPE html><\/span>\r\n<html<\/span> lang=<\/span>\"ja\"<\/span>><\/span>\r\n    <head><\/span>\r\n        <meta<\/span> charset=<\/span>\"UTF-8\"<\/span>><\/span>\r\n        <title><\/span>{{ title }}<\/title><\/span>\r\n    <\/head><\/span>\r\n    <body><\/span>\r\n        <h2><\/span>\u793e\u54e1\u4e00\u89a7<\/h2><\/span>\r\n        <ul><\/span>\r\n            {% for line in dataset %}\r\n            <li><\/span>{{ line.employee_id }} : {{ line.name }} : {{ line.abbreviation }}<\/li><\/span>\r\n            {% endfor %}\r\n        <\/ul><\/span>\r\n    <\/body><\/span>\r\n<\/html><\/span>\r\n<\/code><\/pre>\n
    \u7528\u8bed\u5907\u5fd8\u5f55<\/h2>\n
      \n
    • \n
        cursor \u3068\u306f – \u308f\u308f\u308f<\/ul>\n<\/li>\n<\/ul>\n
         <\/p>\n
          fetch \u3068\u306f – \u308f\u308f\u308f<\/ul>\n
          \u7406\u89e3\u7b14\u8bb0<\/h2>\n
          psycopg2\u306e\u4f7f\u3044\u65b9\u306e\u9806\u5e8f\u306f\u4ee5\u4e0b<\/p>\n
          DB\u306e\u63a5\u7d9a\u60c5\u5831\u3092\u4f5c\u308b(conn = psycopg2.connect(\uff5e)
          \nDB\u306b\u63a5\u7d9a\u3059\u308b
          \nSQL\u3092\u6295\u5165\u3059\u308b
          \n\u7d50\u679c\u3092\u53d6\u5f97\u3059\u308b
          \n\u30b3\u30cd\u30af\u30b7\u30e7\u30f3\u3092\u9589\u3058\u308b
          \n\u53d6\u5f97\u3057\u305f\u7d50\u679c\u3092\u51e6\u7406\u3059\u308b<\/p>\n
          psycopg2.extras.DictCursor\u3068\u306f<\/p>\n
          Python psycopg2 \u3067 dict\u5f62\u5f0f\u3067\u7d50\u679c\u3092\u53d6\u5f97\u3059\u308b<\/p>\n
          psycopg2 \u3067\u3088\u304f\u3084\u308b\u64cd\u4f5c\u307e\u3068\u3081<\/p>\n
          \u30aa\u30b7\u30e3\u30ec\u306awith\u3092\u4f7f\u3063\u305f\u8a18\u8f09\u3082\u3042\u308b
          \n\u300c\u5b9f\u884c\u7d50\u679c\u3092\u8f9e\u66f8\u5f62\u5f0f\u3067\u53d6\u5f97\u3059\u308b\u300d\u3089\u3057\u3044<\/p>\n
          \u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u306b\u6e21\u3059\u969b\u306edataset=employee_list<\/p>\n
          dataset\u306f\u5b9a\u578b\u53e5\u3067\u306f\u306a\u304f\u4f55\u3067\u3082\u826f\u3044<\/p>\n
          .html\u5074\u306f\u4e0a\u8a18\u3067\u6307\u5b9a\u3055\u308c\u305f\u5909\u6570\u306b\u5bfe\u3057\u3066\u64cd\u4f5c\u3067\u304d\u308b<\/p>\n
          \u4ee5\u5b57\u5178\u5f62\u5f0f\u83b7\u53d6\u6267\u884c\u7ed3\u679c<\/h1>\n
          import<\/span> psycopg2<\/span>\r\nimport<\/span> psycopg2.extras<\/span>\r\n\r\ndef<\/span> main<\/span>():<\/span>\r\n    \"\"\"<\/span>_summary_\r\n    \u793e\u54e1\u30ea\u30b9\u30c8\u3092\u8868\u793a\r\n    <\/span>\"\"\"<\/span>\r\n    # PostgreSQL Server\u3068\u306e\u63a5\u7d9a\u3092\u5b9a\u7fa9\r\n<\/span>    conn<\/span> =<\/span> psycopg2<\/span>.<\/span>connect<\/span>(<\/span>\r\n        host<\/span>=<\/span>'<\/span>localhost<\/span>'<\/span>,<\/span>\r\n        port<\/span>=<\/span>5432<\/span>,<\/span>\r\n        database<\/span>=<\/span>'<\/span>srvrec<\/span>'<\/span>,<\/span>\r\n        user<\/span>=<\/span>'<\/span>srvrec<\/span>'<\/span>,<\/span>\r\n        password<\/span>=<\/span>'<\/span>vorpoc-2020-srvrec<\/span>'<\/span>,<\/span>\r\n    )<\/span>\r\n\r\n    # PostgreSQL Server\u3068\u63a5\u7d9a\u3092\u4f5c\u6210\r\n<\/span>    cur<\/span> =<\/span> conn<\/span>.<\/span>cursor<\/span>(<\/span>cursor_factory<\/span>=<\/span>psycopg2<\/span>.<\/span>extras<\/span>.<\/span>DictCursor<\/span>)<\/span>\r\n    # SQL\u3092\u6295\u5165\u3057\u3066\u60c5\u5831\u53d6\u5f97\r\n<\/span>    cur<\/span>.<\/span>execute<\/span>(<\/span>'<\/span>select * from employee order by employee_id<\/span>'<\/span>)<\/span>\r\n    # \u7d50\u679c\u3092\u53d6\u5f97\r\n<\/span>    row<\/span> =<\/span> cur<\/span>.<\/span>fetchall<\/span>()<\/span>\r\n    print<\/span>(<\/span>row<\/span>)<\/span>\r\n\r\n    # PostgreSQL Server\u3068\u63a5\u7d9a\u3092\u4f5c\u6210\r\n<\/span>    cur<\/span> =<\/span> conn<\/span>.<\/span>cursor<\/span>()<\/span>\r\n    # SQL\u3092\u6295\u5165\u3057\u3066\u60c5\u5831\u53d6\u5f97\r\n<\/span>    cur<\/span>.<\/span>execute<\/span>(<\/span>'<\/span>select * from employee order by employee_id<\/span>'<\/span>)<\/span>\r\n    # \u7d50\u679c\u3092\u53d6\u5f97\r\n<\/span>    bow<\/span> =<\/span> cur<\/span>.<\/span>fetchall<\/span>()<\/span>\r\n    print<\/span>(<\/span>bow<\/span>)<\/span>\r\n    # \u63a5\u7d9a\u7d42\u4e86\r\n<\/span>    conn<\/span>.<\/span>close<\/span>()<\/span>\r\n\r\nif<\/span> __name__<\/span> ==<\/span> '<\/span>__main__<\/span>'<\/span>:<\/span>\r\n    main<\/span>()<\/span>\r\n<\/code><\/pre>\n
          \u770b\u4e00\u4e0b\u6307\u5b9a\u7684\u884c\uff08dict\u6307\u5b9a\u7684row\uff09\u4e0e\u4e0d\u6307\u5b9a\u7684\u5217\uff08\u65e0\u6307\u5b9a\u7684bow\uff09\u7684\u8f93\u51fa\u5dee\u5f02\u3002<\/p>\n
          $ <\/span>python .\/dict_what.py\r\n[[<\/span>'100001'<\/span>, '\u5317\u6761 \u6cf0\u6642'<\/span>]<\/span>, [<\/span>'100002'<\/span>, '\u5317\u6761 \u653f\u5b50'<\/span>]<\/span>, [<\/span>'100003'<\/span>, '\u5317\u6761 \u6642\u623f'<\/span>]<\/span>, [<\/span>'100004'<\/span>, '\u4e09\u6d66 \u7fa9\u6751'<\/span>]]<\/span>\r\n[(<\/span>'100001'<\/span>, '\u5317\u6761 \u6cf0\u6642'<\/span>)<\/span>, (<\/span>'100002'<\/span>, '\u5317\u6761 \u653f\u5b50'<\/span>)<\/span>, (<\/span>'100003'<\/span>, '\u5317\u6761 \u6642\u623f'<\/span>)<\/span>, (<\/span>'100004'<\/span>, '\u4e09\u6d66 \u7fa9\u6751'<\/span>)]<\/span>\r\n<\/code><\/pre>\n
            Python\u306e\u89d2\u62ec\u5f27\u3068\u4e38\u62ec\u5f27\u306e\u9055\u3044\u3001\u4e38\u62ec\u5f27\u3092\u4f7f\u3046\u5834\u5408\u306e\u6ce8\u610f\u70b9\u3010()\u3068[]\u3001\u30bf\u30d7\u30eb\u578b\u3068\u30ea\u30b9\u30c8\u578b\u3011<\/ul>\n
            \u54ce\u5440\uff0c\u6211\u672c\u4ee5\u4e3a\u4f1a\u4ee5{}\u7684\u65b9\u5f0f\u663e\u793a\uff0c\u96be\u9053\u5f04\u9519\u4e86\u5417\uff1f<\/p>\n
            import<\/span> psycopg2<\/span>\r\nimport<\/span> psycopg2.extras<\/span>\r\n\r\ndef<\/span> main<\/span>():<\/span>\r\n    \"\"\"<\/span>_summary_\r\n    \u793e\u54e1\u30ea\u30b9\u30c8\u3092\u8868\u793a\r\n    <\/span>\"\"\"<\/span>\r\n    # PostgreSQL Server\u3068\u306e\u63a5\u7d9a\u3092\u5b9a\u7fa9\r\n<\/span>    conn<\/span> =<\/span> psycopg2<\/span>.<\/span>connect<\/span>(<\/span>\r\n        host<\/span>=<\/span>'<\/span>localhost<\/span>'<\/span>,<\/span>\r\n        port<\/span>=<\/span>5432<\/span>,<\/span>\r\n        database<\/span>=<\/span>'<\/span>srvrec<\/span>'<\/span>,<\/span>\r\n        user<\/span>=<\/span>'<\/span>srvrec<\/span>'<\/span>,<\/span>\r\n        password<\/span>=<\/span>'<\/span>vorpoc-2020-srvrec<\/span>'<\/span>,<\/span>\r\n    )<\/span>\r\n\r\n    # PostgreSQL Server\u3068\u63a5\u7d9a\u3092\u4f5c\u6210\r\n<\/span>    cur<\/span> =<\/span> conn<\/span>.<\/span>cursor<\/span>(<\/span>cursor_factory<\/span>=<\/span>psycopg2<\/span>.<\/span>extras<\/span>.<\/span>DictCursor<\/span>)<\/span>\r\n    # SQL\u3092\u6295\u5165\u3057\u3066\u60c5\u5831\u53d6\u5f97\r\n<\/span>    cur<\/span>.<\/span>execute<\/span>(<\/span>'<\/span>select * from employee order by employee_id<\/span>'<\/span>)<\/span>\r\n    # \u7d50\u679c\u3092\u53d6\u5f97\r\n<\/span>    row<\/span> =<\/span> cur<\/span>.<\/span>fetchone<\/span>()<\/span>\r\n    print<\/span>(<\/span>row<\/span>)<\/span>\r\n    print<\/span>(<\/span>type<\/span>(<\/span>row<\/span>))<\/span>\r\n\r\n    # PostgreSQL Server\u3068\u63a5\u7d9a\u3092\u4f5c\u6210\r\n<\/span>    cur<\/span> =<\/span> conn<\/span>.<\/span>cursor<\/span>()<\/span>\r\n    # SQL\u3092\u6295\u5165\u3057\u3066\u60c5\u5831\u53d6\u5f97\r\n<\/span>    cur<\/span>.<\/span>execute<\/span>(<\/span>'<\/span>select * from employee order by employee_id<\/span>'<\/span>)<\/span>\r\n    # \u7d50\u679c\u3092\u53d6\u5f97\r\n<\/span>    bow<\/span> =<\/span> cur<\/span>.<\/span>fetchone<\/span>()<\/span>\r\n    print<\/span>(<\/span>bow<\/span>)<\/span>\r\n    print<\/span>(<\/span>type<\/span>(<\/span>bow<\/span>))<\/span>\r\n    # \u63a5\u7d9a\u7d42\u4e86\r\n<\/span>    conn<\/span>.<\/span>close<\/span>()<\/span>\r\n\r\nif<\/span> __name__<\/span> ==<\/span> '<\/span>__main__<\/span>'<\/span>:<\/span>\r\n    main<\/span>()<\/span>\r\n<\/code><\/pre>\n
            $ <\/span>python .\\d<\/span>ict_what.py\r\n[<\/span>'100001'<\/span>, '\u5317\u6761 \u6cf0\u6642'<\/span>]<\/span>\r\n<class 'psycopg2.extras.DictRow'<\/span>><\/span>\r\n(<\/span>'100001'<\/span>, '\u5317\u6761 \u6cf0\u6642'<\/span>)<\/span>\r\n<class 'tuple'<\/span>><\/span>\r\n<\/code><\/pre>\n
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            \u521b\u5efa\u73af\u5883 # \u4eee\u60f3\u74b0\u5883\u306e\u4f5c\u6210 + activate $ python -m venv flask_to_pos […]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-41907","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\nFlask\u548cPostgreSQL\u670d\u52a1\u5668\u7684\u8fde\u63a5\u8bb0\u5f55 - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/flask\u548cpostgresql\u670d\u52a1\u5668\u7684\u8fde\u63a5\u8bb0\u5f55\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Flask\u548cPostgreSQL\u670d\u52a1\u5668\u7684\u8fde\u63a5\u8bb0\u5f55\" \/>\n<meta property=\"og:description\" content=\"\u521b\u5efa\u73af\u5883 # \u4eee\u60f3\u74b0\u5883\u306e\u4f5c\u6210 + activate $ python -m venv flask_to_pos […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/flask\u548cpostgresql\u670d\u52a1\u5668\u7684\u8fde\u63a5\u8bb0\u5f55\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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