{"id":1487,"date":"2018-02-18T20:31:22","date_gmt":"2018-02-18T11:31:22","guid":{"rendered":"http:\/\/www.python.ambitious-engineer.com\/?p=1487"},"modified":"2018-02-25T11:52:32","modified_gmt":"2018-02-25T02:52:32","slug":"sqlalchemy%e5%85%a5%e9%96%80-orm","status":"publish","type":"post","link":"https:\/\/www.python.ambitious-engineer.com\/archives\/1487","title":{"rendered":"SQLAlchemy\u5165\u9580 ORM \u305d\u306e1"},"content":{"rendered":"

SQLAlchemy\u304c\u63d0\u4f9b\u3059\u308bORM\u6a5f\u80fd\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001DB\u306e\u30c7\u30fc\u30bf\u3092Python\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u307f\u306a\u3057\u3066\u6271\u3046\u3053\u3068\u304c\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n

\u30c6\u30fc\u30d6\u30eb\u30af\u30e9\u30b9\u306e\u5b9a\u7fa9<\/h2>\n

\u30c6\u30fc\u30d6\u30eb\u30af\u30e9\u30b9\u306e\u5b9a\u7fa9<\/h3>\n

\u5927\u62b5\u306eORM\u3067\u306f\u30c6\u30fc\u30d6\u30eb\u306b\u5bfe\u5fdc\u3059\u308b\u30af\u30e9\u30b9\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u3002\u672c\u8b1b\u5ea7\u3067\u306f\u4fbf\u5b9c\u4e0a\u30c6\u30fc\u30d6\u30eb\u30af\u30e9\u30b9\u3068\u547c\u3076\u3053\u3068\u306b\u3057\u307e\u3059\u3002\u307e\u305f\u3001\u30c6\u30fc\u30d6\u30eb\u30af\u30e9\u30b9\u304b\u3089\u751f\u6210\u3057\u305f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u30c6\u30fc\u30d6\u30eb\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u547c\u3076\u3053\u3068\u306b\u3057\u307e\u3059\u3002\u3053\u308c\u306fDB\u306e1\u30ec\u30b3\u30fc\u30c9\u306b\u76f8\u5f53\u3057\u307e\u3059\u3002<\/p>\n

SQLAlchemy\u3067\u306f\u30c6\u30fc\u30d6\u30eb\u30af\u30e9\u30b9\u3092\u5b9a\u7fa9\u3059\u308b\u969b\u3001Base\u3068\u547c\u3070\u308c\u308b\u578b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u7d99\u627f\u3057\u305f\u30af\u30e9\u30b9\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002<\/p>\n

\u30b5\u30f3\u30d7\u30eb\u3067\u3059\u3002User\u30c6\u30fc\u30d6\u30eb\u306b\u5bfe\u5fdc\u3059\u308b\u30c6\u30fc\u30d6\u30eb\u30af\u30e9\u30b9\u3092\u5b9a\u7fa9\u3057\u3066\u307f\u307e\u3059\u3002<\/p>\n

\r\nfrom sqlalchemy.ext.declarative import declarative_base\r\nfrom sqlalchemy import Column, Integer, String\r\n\r\nBase = declarative_base()\r\n\r\n\r\nclass User(Base):\r\n    """\r\n    User\u30c6\u30fc\u30d6\u30eb\u30af\u30e9\u30b9\r\n    """\r\n\r\n    # \u30c6\u30fc\u30d6\u30eb\u540d\r\n    __tablename__ = 'users'\r\n\r\n    # \u500b\u3005\u306e\u30ab\u30e9\u30e0\u3092\u5b9a\u7fa9\r\n    id = Column(Integer, primary_key=True)\r\n    name = Column(String)\r\n    age = Column(Integer)\r\n\r\n<\/pre>\n
\u30c6\u30fc\u30d6\u30eb\u751f\u6210<\/h3>\n
\u4ee5\u524d\u5b66\u7fd2\u3057\u305f\u30e1\u30bf\u30c7\u30fc\u30bf\u3092\u4f7f\u7528\u3057\u3066\u30c6\u30fc\u30d6\u30eb\u30af\u30e9\u30b9\u306e\u60c5\u5831\u3092DB\u306b\u53cd\u6620\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002Base\u304b\u3089metadata\u3092\u53d6\u5f97\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u306e\u3067\u3001\u3053\u3053<\/a>\u3067\u5b66\u7fd2\u3057\u305f\u901a\u308a\u306e\u65b9\u6cd5\u3067\u30c6\u30fc\u30d6\u30eb\u751f\u6210\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
\r\nfrom sqlalchemy import create_engine\r\nengine = create_engine('sqlite:\/\/\/:memory:')\r\nmeta = Base.metadata\r\nmeta.create_all(engine)\r\n\r\n<\/pre>\n
ORM\u3068CRUD<\/h2>\n
\u63a5\u7d9a\u3068\u30c7\u30fc\u30bf\u3092\u683c\u7d0d\u3059\u308b\u30af\u30e9\u30b9\u306e\u5b9a\u7fa9\u304c\u3067\u304d\u307e\u3057\u305f\u3002\u30bb\u30c3\u30b7\u30e7\u30f3\u306b\u3064\u3044\u3066\u7c21\u5358\u306b\u8aac\u660e\u3057\u305f\u5f8cORM\u3092\u4f7f\u3063\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n
\u30bb\u30c3\u30b7\u30e7\u30f3<\/h3>\n
ORM\u3092\u4f7f\u7528\u3057\u305fCRUD\u306b\u3064\u3044\u3066\u5b66\u7fd2\u3059\u308b\u524d\u306bORM\u3092\u4f7f\u7528\u3057\u305f\u3053\u3068\u304c\u306a\u3044\u65b9\u5411\u3051\u306b\u3001\u30bb\u30c3\u30b7\u30e7\u30f3\u306b\u3064\u3044\u3066\u96d1\u306b\u8aac\u660e\u3057\u307e\u3059\u3002ORM\u306e\u30bb\u30c3\u30b7\u30e7\u30f3\u3068\u306f\u30b3\u30fc\u30c9\u3068DB\u3067\u540c\u671f\u3092\u53d6\u308b\u4ed5\u7d44\u307f\u3068\u601d\u3063\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n
\u30c6\u30fc\u30d6\u30eb\u30af\u30e9\u30b9\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304cRDB\u306e1\u30ec\u30b3\u30fc\u30c9\u306b\u76f8\u5f53\u3057\u307e\u3059\u304c\u3001\u30bb\u30c3\u30b7\u30e7\u30f3\u3092\u4ecb\u3057\u3066\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u72b6\u614b\u3092DB\u306b\u53cd\u6620\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
SQLAlchemy\u306e\u30bb\u30c3\u30b7\u30e7\u30f3\u306fsessionmaker\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002\u5f15\u6570\u306bengine\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n
\r\nfrom sqlalchemy.orm import sessionmaker\r\nSession = sessionmaker(bind=engine)\r\nsession = Session()\r\n<\/pre>\n
\u305d\u308c\u3067\u306fORM\u306eCRUD\u51e6\u7406\u306b\u3064\u3044\u3066\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n
Insert<\/h3>\n
\u307e\u305a\u306fInsert\u3067\u3059\u3002session.add\u30e1\u30bd\u30c3\u30c9\u306b\u751f\u6210\u3057\u305f\u30c6\u30fc\u30d6\u30eb\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n
\u4f8b\u3048\u3070\u3001\u65b0\u898f\u30e6\u30fc\u30b6\u30fcSuzuki\u3055\u3093\u306e\u30c7\u30fc\u30bf\u3092insert\u3059\u308b\u5834\u5408\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8a18\u8ff0\u3057\u307e\u3059\u3002<\/p>\n
\r\nsuzuki = User(name="Suzuki", age=19)\r\nsession.add(suzuki)\r\nsession.commit()\r\n<\/pre>\n
Select<\/h3>\n
session.query\u30e1\u30bd\u30c3\u30c9\u3067\u30af\u30a8\u30ea\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u53d6\u5f97\u3057\u3001select\u3092\u5b9f\u884c\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u6b21\u56de\u7d30\u304b\u3044\u30af\u30a8\u30ea\u306e\u5b9f\u884c\u65b9\u6cd5\u306b\u3064\u3044\u3066\u5b66\u7fd2\u3057\u307e\u3059\u3002<\/p>\n
\r\nusers_obj = session.query(User).all()\r\n<\/pre>\n
get\u3067\u4e3b\u30ad\u30fc\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
\r\nsuzuki = session.query(User).get(1)\r\n<\/pre>\n
Update<\/h3>\n
\u30c6\u30fc\u30d6\u30eb\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u751f\u6210\u3057\u305f\u308aquery\u30e1\u30bd\u30c3\u30c9\u3067\u53d6\u5f97\u3057\u305f\u5f8c\u3001\u5c5e\u6027\u3092\u66f4\u65b0\u3057\u3066add\u3059\u308b\u3068\u66f4\u65b0\u51e6\u7406\u304c\u5b9f\u884c\u3055\u308c\u307e\u3059\u3002\u4f8b\u3048\u3070\u5148\u307b\u3069insert\u3057\u305fSuzuki\u3055\u3093\u306e\u30c7\u30fc\u30bf\u3092\u4fee\u6b63\u3059\u308b\u5834\u5408\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
\r\nsuzuki = session.query(User).get(1)\r\nsuzuki.age = 20\r\nsession.add(suzuki)\r\nsession.commit()\r\n\r\n<\/pre>\n
Delete<\/h3>\n
\u6700\u5f8c\u306fDelete\u3067\u3059\u3002session.delete\u30e1\u30bd\u30c3\u30c9\u306b\u524a\u9664\u5bfe\u8c61\u306e\u30c6\u30fc\u30d6\u30eb\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n
\r\nsession.delete(suzuki)\r\n<\/pre>\n
\u88dc\u8db3 \u30b5\u30f3\u30d7\u30eb<\/h2>\n
\u88dc\u8db3\u3068\u3057\u3066\u3001\u4e0a\u8a18\u30b5\u30f3\u30d7\u30eb\u3092\u307e\u3068\u3081\u305f\u3082\u306e\u3092\u63b2\u8f09\u3057\u307e\u3059\u3002<\/p>\n
\r\nfrom sqlalchemy.ext.declarative import declarative_base\r\nfrom sqlalchemy import Column, Integer, String\r\nfrom sqlalchemy import create_engine\r\nfrom sqlalchemy.orm import sessionmaker\r\n\r\n# DB\u63a5\u7d9a\r\nengine = create_engine('sqlite:\/\/\/:memory:')\r\n\r\n# Base\r\nBase = declarative_base()\r\n\r\n\r\n# \u30c6\u30fc\u30d6\u30eb\u30af\u30e9\u30b9\u3092\u5b9a\u7fa9\r\nclass User(Base):\r\n    """\r\n    User\u30c6\u30fc\u30d6\u30eb\u30af\u30e9\u30b9\r\n    """\r\n\r\n    # \u30c6\u30fc\u30d6\u30eb\u540d\r\n    __tablename__ = 'users'\r\n\r\n    # \u500b\u3005\u306e\u30ab\u30e9\u30e0\u3092\u5b9a\u7fa9\r\n    id = Column(Integer, primary_key=True)\r\n    name = Column(String)\r\n    age = Column(Integer)\r\n\r\n\r\n# \u30c6\u30fc\u30d6\u30eb\u30af\u30e9\u30b9\u306e\u30c6\u30fc\u30d6\u30eb\u3092\u751f\u6210\r\nBase.metadata.create_all(engine)\r\n\r\n# \u30bb\u30c3\u30b7\u30e7\u30f3\u751f\u6210\r\nSession = sessionmaker(bind=engine)\r\nsession = Session()\r\n\r\n\r\n# \u633f\u5165\u7528\u30ec\u30b3\u30fc\u30c9\u4f5c\u6210\r\nsuzuki = User(name="Suzuki", age=19)\r\nsession.add(suzuki) # insert\u51e6\u7406\r\nsession.commit()    # commit\r\n\r\n# select * from users;\r\nusers_obj = session.query(User).all()\r\nfor user in users_obj:\r\n    print(user.name)\r\n\r\n# select * from users where id = 1;\r\nsuzuki = session.query(User).get(1)\r\nsuzuki.age = 20\r\n\r\n# update\r\nsession.add(suzuki)\r\nsession.commit()\r\n\r\n# delete\r\nsession.delete(suzuki)\r\n\r\n<\/pre>\n
\n\u7c21\u5358\u306aCRUD\u51e6\u7406\u306b\u3064\u3044\u3066\u5b66\u7fd2\u3057\u307e\u3057\u305f\u3002\u6b21\u56de<\/a>\u306f\u69d8\u3005\u306a\u30af\u30a8\u30ea\u306e\u8a18\u8ff0\u65b9\u6cd5\u306b\u3064\u3044\u3066\u5b66\u7fd2\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
SQLAlchemy\u304c\u63d0\u4f9b\u3059\u308bORM\u6a5f\u80fd\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001DB\u306e\u30c7\u30fc\u30bf\u3092Python\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u307f\u306a\u3057\u3066\u6271\u3046\u3053\u3068\u304c\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002 \u30c6\u30fc\u30d6\u30eb\u30af\u30e9\u30b9\u306e\u5b9a\u7fa9 \u30c6\u30fc\u30d6\u30eb\u30af\u30e9\u30b9\u306e\u5b9a\u7fa9 \u5927\u62b5\u306eORM\u3067\u306f\u30c6\u30fc\u30d6\u30eb\u306b\u5bfe\u5fdc\u3059\u308b\u30af\u30e9\u30b9...<\/p>\n","protected":false},"author":1,"featured_media":1577,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[169,3,10],"tags":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.python.ambitious-engineer.com\/wp-json\/wp\/v2\/posts\/1487"}],"collection":[{"href":"https:\/\/www.python.ambitious-engineer.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.python.ambitious-engineer.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.python.ambitious-engineer.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.python.ambitious-engineer.com\/wp-json\/wp\/v2\/comments?post=1487"}],"version-history":[{"count":15,"href":"https:\/\/www.python.ambitious-engineer.com\/wp-json\/wp\/v2\/posts\/1487\/revisions"}],"predecessor-version":[{"id":1600,"href":"https:\/\/www.python.ambitious-engineer.com\/wp-json\/wp\/v2\/posts\/1487\/revisions\/1600"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.python.ambitious-engineer.com\/wp-json\/wp\/v2\/media\/1577"}],"wp:attachment":[{"href":"https:\/\/www.python.ambitious-engineer.com\/wp-json\/wp\/v2\/media?parent=1487"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.python.ambitious-engineer.com\/wp-json\/wp\/v2\/categories?post=1487"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.python.ambitious-engineer.com\/wp-json\/wp\/v2\/tags?post=1487"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}