Python\u3067Web\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u958b\u767a\u3092\u884c\u3046\u969b\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u64cd\u4f5c\u306e\u52b9\u7387\u5316\u3068\u751f\u7523\u6027\u5411\u4e0a\u306e\u305f\u3081\u306b\u6b20\u304b\u305b\u306a\u3044\u30c4\u30fc\u30eb\u304cORM\u3067\u3059\u3002\u672c\u8a18\u4e8b\u3067\u306f\u3001Python\u306e\u4eba\u6c17ORM\u300cSQLAlchemy\u300d\u306b\u3064\u3044\u3066\u3001\u521d\u5fc3\u8005\u5411\u3051\u306b\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u304b\u3089\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3001\u5b9f\u8df5\u7684\u306aTips\u307e\u3067\u5e45\u5e83\u304f\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
\u76ee\u6b21 <\/p>\n
Python\u3067\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u6271\u3046\u969b\u3001\u751f\u306eSQL\u3092\u76f4\u63a5\u66f8\u304f\u306e\u306f\u9762\u5012\u3067\u5927\u5909\u3067\u3059\u3002\u305d\u3053\u3067\u6d3b\u8e8d\u3059\u308b\u306e\u304cORM\u3068\u3044\u3046\u6280\u8853\u3067\u3059\u3002ORM\u3092\u4f7f\u3048\u3070\u3001SQL\u3092\u66f8\u304b\u305a\u306bPython\u306e\u30b3\u30fc\u30c9\u3060\u3051\u3067\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u64cd\u4f5c\u304c\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
ORM\u3068\u306fObject-Relational Mapping\u306e\u7565\u3067\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3068\u30ea\u30ec\u30fc\u30b7\u30e7\u30ca\u30eb\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u9593\u3092\u6a4b\u6e21\u3057\u3059\u308b\u3082\u306e\u3067\u3059\u3002\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u30c6\u30fc\u30d6\u30eb\u3092\u5bfe\u5fdc\u4ed8\u3051\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u64cd\u4f5c\u3092\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u64cd\u4f5c\u306b\u81ea\u52d5\u7684\u306b\u5909\u63db\u3057\u3066\u304f\u308c\u307e\u3059\u3002<\/p>\n\n\n\n
Python\u306b\u306f\u3055\u307e\u3056\u307e\u306aORM\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u305d\u306e\u4e2d\u3067\u3082\u4eba\u6c17\u306a\u306e\u304cSQLAlchemy\u3067\u3059\u3002SQLAlchemy\u306f\u5f37\u529b\u306a\u6a5f\u80fd\u3068\u67d4\u8edf\u6027\u3092\u517c\u306d\u5099\u3048\u305fORM\u3067\u3001MySQL\u3001PostgreSQL\u3001SQLite\u3001Oracle\u306a\u3069\u69d8\u3005\u306a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u5bfe\u5fdc\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n
SQLAlchemy\u3092\u4f7f\u3048\u3070\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30e1\u30ea\u30c3\u30c8\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
\u4f8b\u3048\u3070\u3001SQLAlchemy\u3092\u4f7f\u3046\u3068\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30b3\u30fc\u30c9\u3067\u30c7\u30fc\u30bf\u306e\u53d6\u5f97\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
from sqlalchemy import create_engine\nfrom sqlalchemy.orm import sessionmaker\n\nengine = create_engine('sqlite:\/\/\/example.db')\nSession = sessionmaker(bind=engine)\nsession = Session()\n\nresults = session.query(User).filter(User.age >= 20).all()\nfor user in results:\n print(user.name)<\/pre>\n\n\n\n\u3053\u306e\u3088\u3046\u306bSQL\u3092\u4e00\u5207\u66f8\u304b\u305a\u306b\u3001Python\u306e\u30b3\u30fc\u30c9\u3060\u3051\u3067\u30c7\u30fc\u30bf\u306e\u53d6\u5f97\u304c\u3067\u304d\u308b\u306e\u3067\u3059\u3002\u3053\u308c\u304b\u3089SQLAlchemy\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n
SQLAlchemy\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9<\/h2>\n\n\n\n
SQLAlchemy\u3092\u4f7f\u3063\u3066\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u64cd\u4f5c\u3059\u308b\u969b\u306e\u57fa\u672c\u7684\u306a\u6d41\u308c\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3078\u306e\u63a5\u7d9a\u65b9\u6cd5\u3068\u57fa\u672c\u7684\u306aCRUD\u64cd\u4f5c\u306e\u30b3\u30fc\u30c9\u4f8b<\/h3>\n\n\n\n
\u307e\u305a create_engine<\/code> \u3092\u4f7f\u3063\u3066\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u63a5\u7d9a\u3057\u307e\u3059\u3002\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u7a2e\u985e\u306b\u5fdc\u3058\u3066\u9069\u5207\u306a connection string \u3092\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n\n\n\nfrom sqlalchemy import create_engine\n\n# SQLite\u306e\u5834\u5408\nengine = create_engine('sqlite:\/\/\/example.db')\n\n# MySQL\u306e\u5834\u5408 \nengine = create_engine('mysql:\/\/user:password@localhost\/dbname')\n\n# PostgreSQL\u306e\u5834\u5408\nengine = create_engine('postgresql:\/\/user:password@localhost\/dbname')<\/pre>\n\n\n\n\u6b21\u306b sessionmaker<\/code> \u3092\u4f7f\u3063\u3066\u30bb\u30c3\u30b7\u30e7\u30f3\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002\u30bb\u30c3\u30b7\u30e7\u30f3\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3068\u306e\u3084\u308a\u53d6\u308a\u3092\u7ba1\u7406\u3059\u308b\u3082\u306e\u3067\u3059\u3002<\/p>\n\n\n\nfrom sqlalchemy.orm import sessionmaker\n\nSession = sessionmaker(bind=engine)\nsession = Session()<\/pre>\n\n\n\n\u30bb\u30c3\u30b7\u30e7\u30f3\u3092\u4f7f\u3063\u3066\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306aCRUD\u64cd\u4f5c\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
# CREATE: \u30c7\u30fc\u30bf\u306e\u8ffd\u52a0\nnew_user = User(name='John', age=20)\nsession.add(new_user)\nsession.commit()\n\n# READ: \u30c7\u30fc\u30bf\u306e\u53d6\u5f97\nuser = session.query(User).filter(User.name=='John').first()\n\n# UPDATE: \u30c7\u30fc\u30bf\u306e\u66f4\u65b0\nuser.age = 21\nsession.commit() \n\n# DELETE: \u30c7\u30fc\u30bf\u306e\u524a\u9664\nsession.delete(user)\nsession.commit()<\/pre>\n\n\n\n\u30bb\u30c3\u30b7\u30e7\u30f3\u3092\u4f7f\u3044\u7d42\u308f\u3063\u305f\u3089 close \u3067\u7d42\u4e86\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
session.close()<\/pre>\n\n\n\n\u30c6\u30fc\u30d6\u30eb\u5b9a\u7fa9\u3068\u30ea\u30ec\u30fc\u30b7\u30e7\u30f3\u306e\u8a2d\u5b9a\u65b9\u6cd5<\/h3>\n\n\n\n
SQLAlchemy\u3067\u306f\u30c6\u30fc\u30d6\u30eb\u5b9a\u7fa9\u3092Python\u306e\u30af\u30e9\u30b9\u3067\u8868\u73fe\u3057\u307e\u3059\u3002declarative_base<\/code> \u3092\u4f7f\u3063\u3066\u30d9\u30fc\u30b9\u30af\u30e9\u30b9\u3092\u4f5c\u6210\u3057\u3001\u305d\u308c\u3092\u7d99\u627f\u3057\u3066\u30c6\u30fc\u30d6\u30eb\u306b\u5bfe\u5fdc\u3059\u308b\u30af\u30e9\u30b9\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u3002<\/p>\n\n\n\nfrom sqlalchemy.ext.declarative import declarative_base\nfrom sqlalchemy import Column, Integer, String, ForeignKey\nfrom sqlalchemy.orm import relationship\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\nclass Address(Base):\n __tablename__ = 'addresses'\n\n id = Column(Integer, primary_key=True)\n user_id = Column(Integer, ForeignKey('users.id'))\n street = Column(String)\n city = Column(String)\n\n user = relationship(\"User\", backref=\"addresses\")<\/pre>\n\n\n\n\u3053\u306e\u3088\u3046\u306b\u30c6\u30fc\u30d6\u30eb\u306e\u30ab\u30e9\u30e0\u3092 Column<\/code> \u3067\u5b9a\u7fa9\u3057\u3001\u30c6\u30fc\u30d6\u30eb\u9593\u306e\u30ea\u30ec\u30fc\u30b7\u30e7\u30f3\u3092 ForeignKey<\/code> \u3068 relationship<\/code> \u3067\u8a2d\u5b9a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n\u30c6\u30fc\u30d6\u30eb\u5b9a\u7fa9\u304c\u3067\u304d\u305f\u3089\u3001create_all<\/code> \u3067\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u30c6\u30fc\u30d6\u30eb\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002<\/p>\n\n\n\nBase.metadata.create_all(engine)<\/pre>\n\n\n\n\u30af\u30a8\u30ea\u306e\u5b9f\u884c\u65b9\u6cd5 \u2013 \u30d5\u30a3\u30eb\u30bf\u3001\u30bd\u30fc\u30c8\u3001\u96c6\u8a08\u306a\u3069<\/h3>\n\n\n\n
\u30bb\u30c3\u30b7\u30e7\u30f3\u306e query<\/code> \u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3063\u3066\u30af\u30a8\u30ea\u3092\u5b9f\u884c\u3057\u307e\u3059\u3002filter<\/code> \u3067\u6761\u4ef6\u3092\u6307\u5b9a\u3057\u3001all<\/code> \u3084 first<\/code> \u3067\u53d6\u5f97\u4ef6\u6570\u3092\u5236\u5fa1\u3057\u307e\u3059\u3002<\/p>\n\n\n\n# \u5168\u4ef6\u53d6\u5f97\nusers = session.query(User).all()\n\n# \u6761\u4ef6\u3092\u6307\u5b9a\u3057\u3066\u53d6\u5f97\nyoung_users = session.query(User).filter(User.age < 30).all()\n\n# 1\u4ef6\u3060\u3051\u53d6\u5f97\nuser = session.query(User).filter(User.name=='John').first()<\/pre>\n\n\n\norder_by<\/code> \u3067\u4e26\u3073\u66ff\u3048\u3001limit<\/code> \u3084 offset<\/code> \u3067\u30da\u30fc\u30b8\u30cd\u30fc\u30b7\u30e7\u30f3\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n# \u5e74\u9f62\u306e\u6607\u9806\u3067\u4e26\u3073\u66ff\u3048\nusers = session.query(User).order_by(User.age).all()\n\n# \u6700\u521d\u306e10\u4ef6\u3060\u3051\u53d6\u5f97\nusers = session.query(User).limit(10).all()\n\n# 11\u4ef6\u76ee\u304b\u308920\u4ef6\u76ee\u3092\u53d6\u5f97\nusers = session.query(User).offset(10).limit(10).all()<\/pre>\n\n\n\n\u96c6\u7d04\u95a2\u6570\u3092\u4f7f\u3063\u305f\u8a08\u7b97\u3082\u53ef\u80fd\u3067\u3059\u3002<\/p>\n\n\n\n
# \u30e6\u30fc\u30b6\u30fc\u6570\u3092\u53d6\u5f97\ncount = session.query(User).count()\n\n# \u5e73\u5747\u5e74\u9f62\u3092\u53d6\u5f97\navg_age = session.query(func.avg(User.age)).scalar()\n\n# \u90fd\u5e02\u3054\u3068\u306e\u30e6\u30fc\u30b6\u30fc\u6570\u3092\u53d6\u5f97\ncity_counts = session.query(Address.city, func.count(User.id)).join(User).group_by(Address.city).all()<\/pre>\n\n\n\n\u3053\u306e\u3088\u3046\u306bSQLAlchemy\u3092\u4f7f\u3048\u3070\u3001SQL\u3092\u66f8\u304b\u305a\u306bPython\u306e\u30b3\u30fc\u30c9\u3060\u3051\u3067\u67d4\u8edf\u306a\u30af\u30a8\u30ea\u3092\u5b9f\u884c\u3067\u304d\u307e\u3059\u3002ORM\u306e\u529b\u3092\u501f\u308a\u308b\u3053\u3068\u3067\u3001\u751f\u7523\u6027\u3092\u9ad8\u3081\u3064\u3064\u3001\u5805\u7262\u306a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30a2\u30af\u30bb\u30b9\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u308b\u306e\u3067\u3059\u3002<\/p>\n\n\n\n
SQLAlchemy\u3092\u4f7f\u3046\u4e0a\u3067\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h2>\n\n\n\n
SQLAlchemy\u306f\u5f37\u529b\u3067\u67d4\u8edf\u6027\u306e\u9ad8\u3044ORM\u3067\u3059\u304c\u3001\u4f7f\u3044\u65b9\u3092\u8aa4\u308b\u3068\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u4f4e\u4e0b\u3084\u30d0\u30b0\u306e\u539f\u56e0\u306b\u306a\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u3001SQLAlchemy\u3092\u52b9\u679c\u7684\u306b\u4f7f\u3046\u305f\u3081\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u3044\u304f\u3064\u304b\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
\u30bb\u30c3\u30b7\u30e7\u30f3\u306e\u7ba1\u7406\u65b9\u6cd5 \u2013 \u30b3\u30df\u30c3\u30c8\u3068\u30ed\u30fc\u30eb\u30d0\u30c3\u30af<\/h3>\n\n\n\n
SQLAlchemy\u3067\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3068\u306e\u3084\u308a\u3068\u308a\u306f\u30bb\u30c3\u30b7\u30e7\u30f3\u3092\u4ecb\u3057\u3066\u884c\u3044\u307e\u3059\u3002\u30bb\u30c3\u30b7\u30e7\u30f3\u306f\u3001\u30ea\u30af\u30a8\u30b9\u30c8\u306e\u958b\u59cb\u6642\u306b\u4f5c\u6210\u3057\u3001\u30ea\u30af\u30a8\u30b9\u30c8\u306e\u7d42\u4e86\u6642\u306b\u7834\u68c4\u3059\u308b\u306e\u304c\u57fa\u672c\u3067\u3059\u3002\u30bb\u30c3\u30b7\u30e7\u30f3\u3092\u9577\u6642\u9593\u4fdd\u6301\u3057\u3066\u3044\u308b\u3068\u3001\u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u3084\u30c7\u30fc\u30bf\u4e0d\u6574\u5408\u306a\u3069\u306e\u554f\u984c\u304c\u8d77\u3053\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
\u30bb\u30c3\u30b7\u30e7\u30f3\u3092\u9069\u5207\u306b\u7ba1\u7406\u3059\u308b\u306b\u306f\u3001\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u30de\u30cd\u30fc\u30b8\u30e3\uff08with\u6587\uff09\u3092\u4f7f\u3046\u306e\u304c\u4fbf\u5229\u3067\u3059\u3002\u3053\u308c\u3092\u4f7f\u3048\u3070\u3001\u30bb\u30c3\u30b7\u30e7\u30f3\u306e\u30af\u30ed\u30fc\u30ba\u51e6\u7406\u3092\u81ea\u52d5\u7684\u306b\u884c\u3063\u3066\u304f\u308c\u307e\u3059\u3002<\/p>\n\n\n\n
with Session() as session:\n user = session.query(User).filter(User.id == 1).first()\n user.name = 'New Name'\n session.commit()<\/pre>\n\n\n\n\u30bb\u30c3\u30b7\u30e7\u30f3\u3092\u4f7f\u3063\u3066\u884c\u3063\u305f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3078\u306e\u5909\u66f4\u306f\u3001\u660e\u793a\u7684\u306bcommit<\/code>\u3092\u547c\u3073\u51fa\u3059\u307e\u3067\u78ba\u5b9a\u3055\u308c\u307e\u305b\u3093\u3002\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u306a\u3069\u306frollback<\/code>\u3092\u547c\u3093\u3067\u5909\u66f4\u3092\u7834\u68c4\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\nN+1\u554f\u984c\u3092\u56de\u907f\u3059\u308b\u305f\u3081\u306e\u30a4\u30fc\u30ac\u30fc\u30ed\u30fc\u30c9\u306e\u4f7f\u3044\u65b9<\/h3>\n\n\n\n
\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30ea\u30ec\u30fc\u30b7\u30e7\u30f3\u5148\u306e\u30c7\u30fc\u30bf\u306f\u3001\u660e\u793a\u7684\u306b\u30ed\u30fc\u30c9\u3059\u308b\u307e\u3067\u30a2\u30af\u30bb\u30b9\u3055\u308c\u307e\u305b\u3093\uff08\u30ec\u30a4\u30b8\u30fc\u30ed\u30fc\u30c9\uff09\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u4e0d\u8981\u306a\u30c7\u30fc\u30bf\u3092\u30ed\u30fc\u30c9\u3059\u308b\u3053\u3068\u3092\u907f\u3051\u3089\u308c\u308b\u4e00\u65b9\u3001\u30ea\u30ec\u30fc\u30b7\u30e7\u30f3\u5148\u306e\u30c7\u30fc\u30bf\u306b\u30a2\u30af\u30bb\u30b9\u304c\u4f55\u5ea6\u3082\u5fc5\u8981\u306a\u5834\u5408\u306fN+1\u554f\u984c\u304c\u767a\u751f\u3057\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/p>\n\n\n\n
N+1\u554f\u984c\u3092\u56de\u907f\u3059\u308b\u306b\u306f\u3001joinedload<\/code>\u3084subqueryload<\/code>\u3092\u4f7f\u3063\u3066\u4e8b\u524d\u306b\u30ea\u30ec\u30fc\u30b7\u30e7\u30f3\u5148\u306e\u30c7\u30fc\u30bf\u3092\u30ed\u30fc\u30c9\u3057\u3066\u304a\u304f\uff08\u30a4\u30fc\u30ac\u30fc\u30ed\u30fc\u30c9\uff09\u306e\u304c\u6709\u52b9\u3067\u3059\u3002<\/p>\n\n\n\nfrom sqlalchemy.orm import joinedload\n\nusers = session.query(User).options(joinedload(User.addresses)).all()\nfor user in users:\n print(user.addresses) # addresses\u306f\u3059\u3067\u306b\u30ed\u30fc\u30c9\u6e08\u307f<\/pre>\n\n\n\n\u305f\u3060\u3057\u3001\u30a4\u30fc\u30ac\u30fc\u30ed\u30fc\u30c9\u3092\u591a\u7528\u3059\u308b\u3068\u304b\u3048\u3063\u3066\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u4f4e\u4e0b\u3059\u308b\u5834\u5408\u3082\u3042\u308b\u306e\u3067\u3001\u5fc5\u8981\u306a\u30b1\u30fc\u30b9\u306e\u307f\u4f7f\u7528\u3059\u308b\u3088\u3046\u306b\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n
\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u4e0a\u3052\u308b\u305f\u3081\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u8a2d\u5b9a\u65b9\u6cd5<\/h3>\n\n\n\n
\u30af\u30a8\u30ea\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u4e0a\u3052\u308b\u306b\u306f\u3001\u9069\u5207\u306a\u30ab\u30e9\u30e0\u306b\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002SQLAlchemy\u3067\u306f\u3001\u30e2\u30c7\u30eb\u306e\u5b9a\u7fa9\u6642\u306b\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u6307\u5b9a\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
class User(Base):\n __tablename__ = 'users'\n\n id = Column(Integer, primary_key=True)\n name = Column(String, index=True)\n email = Column(String, unique=True)<\/pre>\n\n\n\n\u3053\u3053\u3067\u306f\u3001name<\/code>\u30ab\u30e9\u30e0\u306b\u901a\u5e38\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u3001email<\/code>\u30ab\u30e9\u30e0\u306b\u30e6\u30cb\u30fc\u30af\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u8a2d\u5b9a\u3057\u3066\u3044\u307e\u3059\u3002\u3088\u304f\u691c\u7d22\u306b\u4f7f\u3046\u30ab\u30e9\u30e0\u3084\u3001\u4e00\u610f\u6027\u3092\u4fdd\u8a3c\u3057\u305f\u3044\u30ab\u30e9\u30e0\u306b\u306f\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u8a2d\u5b9a\u3057\u3066\u304a\u304f\u3068\u826f\u3044\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n\u305f\u3060\u3057\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u8cbc\u308a\u3059\u304e\u308b\u3068\u30c7\u30fc\u30bf\u306e\u633f\u5165\/\u66f4\u65b0\u6642\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u4f4e\u4e0b\u3059\u308b\u306e\u3067\u3001\u904e\u5270\u306a\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u8a2d\u5b9a\u306f\u907f\u3051\u308b\u306e\u304c\u8ce2\u660e\u3067\u3059\u3002\u8981\u4ef6\u3092\u3088\u304f\u691c\u8a0e\u3057\u3001\u5fc5\u8981\u5341\u5206\u306a\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u8a2d\u5b9a\u3059\u308b\u3088\u3046\u5fc3\u304c\u3051\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n
\u3002<\/p>\n\n\n\n
SQLAlchemy\u306e\u30e1\u30ea\u30c3\u30c8\u3068\u30c7\u30e1\u30ea\u30c3\u30c8<\/h2>\n\n\n\n
\u3053\u3053\u307e\u3067\u3001SQLAlchemy\u306e\u6982\u8981\u3084\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u3001\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u306a\u3069\u3092\u898b\u3066\u304d\u307e\u3057\u305f\u3002SQLAlchemy\u306f\u5f37\u529b\u3067\u67d4\u8edf\u306aORM\u3067\u3042\u308a\u3001Python\u3067\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u64cd\u4f5c\u3092\u5927\u5e45\u306b\u52b9\u7387\u5316\u3057\u3066\u304f\u308c\u308b\u30c4\u30fc\u30eb\u3060\u3068\u3044\u3046\u3053\u3068\u304c\u304a\u308f\u304b\u308a\u3044\u305f\u3060\u3051\u305f\u306e\u3067\u306f\u306a\u3044\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n\n\n\n
\u3057\u304b\u3057\u3001\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u958b\u767a\u306b\u304a\u3044\u3066\u30b7\u30eb\u30d0\u30fc\u30d0\u30ec\u30c3\u30c8\u3068\u306a\u308b\u30c4\u30fc\u30eb\u306f\u5b58\u5728\u3057\u307e\u305b\u3093\u3002SQLAlchemy\u306b\u3082\u4e00\u9577\u4e00\u77ed\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u3053\u304b\u3089\u306f\u3001SQLAlchemy\u306e\u4e3b\u306a\u30e1\u30ea\u30c3\u30c8\u3068\u30c7\u30e1\u30ea\u30c3\u30c8\u3092\u307e\u3068\u3081\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
SQLAlchemy\u306e\u9577\u6240<\/h3>\n\n\n\n
SQLAlchemy\u306e\u6700\u5927\u306e\u5229\u70b9\u306f\u3001SQL\u3092\u76f4\u63a5\u66f8\u304b\u306a\u304f\u3066\u3082\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u64cd\u4f5c\u3067\u304d\u308b\u70b9\u306b\u3042\u308a\u307e\u3059\u3002SQL\u306e\u77e5\u8b58\u304c\u4e4f\u3057\u3044\u958b\u767a\u8005\u3067\u3082\u3001Python\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u64cd\u4f5c\u306e\u611f\u899a\u3067\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u6271\u3048\u308b\u305f\u3081\u3001\u751f\u7523\u6027\u304c\u5927\u304d\u304f\u5411\u4e0a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
\u307e\u305f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u5c64\u304c\u62bd\u8c61\u5316\u3055\u308c\u3066\u3044\u308b\u305f\u3081\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u9055\u3044\u3092\u610f\u8b58\u305b\u305a\u306b\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u958b\u767a\u3067\u304d\u307e\u3059\u3002\u958b\u767a\u6642\u306fSQLite\u3092\u4f7f\u3044\u3001\u672c\u756a\u74b0\u5883\u3067\u306fMySQL\u306b\u5207\u308a\u66ff\u3048\u308b\u3001\u3068\u3044\u3063\u305f\u3053\u3068\u304c\u5bb9\u6613\u306b\u884c\u3048\u307e\u3059\u3002<\/p>\n\n\n\n
\u52a0\u3048\u3066\u3001SQLAlchemy\u306e\u30af\u30a8\u30ea\u30d3\u30eb\u30c0\u306f\u975e\u5e38\u306b\u5f37\u529b\u3067\u67d4\u8edf\u6027\u306b\u5bcc\u3093\u3067\u3044\u307e\u3059\u3002\u8907\u96d1\u306a\u30af\u30a8\u30ea\u2015\u3082\u3001\u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u76f4\u611f\u7684\u306b\u7d44\u307f\u7acb\u3066\u3089\u308c\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n
SQLAlchemy\u306e\u77ed\u6240<\/h3>\n\n\n\n
\u4e00\u65b9\u3067\u3001SQLAlchemy\u306b\u306f\u30c7\u30e1\u30ea\u30c3\u30c8\u3082\u3042\u308a\u307e\u3059\u3002\u8907\u96d1\u306a\u30af\u30a8\u30ea\u306e\u5834\u5408\u3001SQL\u3092\u76f4\u63a5\u66f8\u3044\u305f\u65b9\u304c\u30b7\u30f3\u30d7\u30eb\u306b\u306a\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u6700\u512a\u5148\u3067\u8ffd\u6c42\u3059\u308b\u5834\u5408\u3001ORM\u306e\u62bd\u8c61\u5316\u306b\u3088\u308b\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u304c\u554f\u984c\u306b\u306a\u308b\u5834\u5408\u3082\u3042\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n
\u307e\u305f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3068\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u9593\u306b\u8907\u96d1\u306a\u5c64\u304c\u5165\u308b\u3053\u3068\u3067\u3001\u30c7\u30d0\u30c3\u30b0\u304c\u96e3\u3057\u304f\u306a\u308b\u3068\u3044\u3046\u30c7\u30e1\u30ea\u30c3\u30c8\u3082\u3042\u308a\u307e\u3059\u3002\u767a\u884c\u3055\u308c\u308bSQL\u3092\u78ba\u8a8d\u3057\u306a\u304c\u3089\u3067\u306a\u3044\u3068\u554f\u984c\u306e\u539f\u56e0\u7279\u5b9a\u304c\u96e3\u3057\u3044\u30b1\u30fc\u30b9\u3082\u3088\u304f\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
\u305d\u3057\u3066\u3001SQLAlchemy\u3092\u9069\u5207\u306b\u4f7f\u3044\u3053\u306a\u3059\u306b\u306f\u3001\u4e00\u5b9a\u306e\u5b66\u7fd2\u30b3\u30b9\u30c8\u304c\u5fc5\u8981\u306a\u306e\u3082\u4e8b\u5b9f\u3067\u3059\u3002Lazy Loading\u306e\u4ed5\u7d44\u307f\u3092\u7406\u89e3\u3057\u3066\u3044\u306a\u3044\u3068\u3001\u77e5\u3089\u305a\u77e5\u3089\u305a\u306e\u3046\u3061\u306bN+1\u554f\u984c\u3092\u5f15\u304d\u8d77\u3053\u3057\u3066\u3057\u307e\u3046\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002<\/p>\n\n\n\n
\u4f7f\u3044\u3069\u3053\u308d\u3092\u3088\u304f\u898b\u6975\u3081\u308b\u3053\u3068\u304c\u809d\u8981<\/h3>\n\n\n\n
SQLAlchemy\u306f\u4e07\u80fd\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u304c\u3001\u591a\u304f\u306e\u30b1\u30fc\u30b9\u3067\u958b\u767a\u8005\u306e\u5f37\u529b\u306a\u5473\u65b9\u3068\u306a\u308b\u3067\u3057\u3087\u3046\u3002\u91cd\u8981\u306a\u306e\u306f\u3001\u81ea\u5206\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u8981\u4ef6\u3092\u3088\u304f\u898b\u6975\u3081\u3001\u9069\u6750\u9069\u6240\u3067SQLAlchemy\u3092\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3059\u3002<\/p>\n\n\n\n
SQL\u3092\u76f4\u63a5\u66f8\u304f\u306e\u304c\u826f\u3044\u30b1\u30fc\u30b9\u3082\u3042\u308c\u3070\u3001SQLAlchemy\u3092\u4f7f\u3046\u306e\u304c\u826f\u3044\u30b1\u30fc\u30b9\u3082\u3042\u308a\u307e\u3059\u3002\u4e21\u8005\u306e\u7279\u6027\u3092\u3088\u304f\u7406\u89e3\u3057\u305f\u4e0a\u3067\u3001\u4f7f\u3044\u5206\u3051\u304c\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308b\u3053\u3068\u304c\u7406\u60f3\u3067\u3059\u3002<\/p>\n\n\n\n
\u3069\u3093\u306a\u30c4\u30fc\u30eb\u306b\u3082\u30e1\u30ea\u30c3\u30c8\u3068\u30c7\u30e1\u30ea\u30c3\u30c8\u306f\u3064\u304d\u3082\u306e\u3067\u3059\u304c\u3001\u305d\u306e\u7279\u6027\u3092\u7406\u89e3\u3057\u3001\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306b\u5408\u308f\u305b\u3066\u67d4\u8edf\u306b\u9078\u629e\u30fb\u6d3b\u7528\u3067\u304d\u308b\u306e\u304c\u3001\u3088\u3044\u30a8\u30f3\u30b8\u30cb\u30a2\u306e\u6761\u4ef6\u3060\u3068\u8a00\u3048\u308b\u3067\u3057\u3087\u3046\u3002
<\/p>\n\n\n\n
\u3059\u3002<\/p>\n\n\n\n
SQLAlchemy\u3092\u4f7f\u3063\u305f\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u958b\u767a\u306e\u6d41\u308c<\/h2>\n\n\n\n
\u3053\u3053\u307e\u3067SQLAlchemy\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u3084\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u898b\u3066\u304d\u307e\u3057\u305f\u304c\u3001\u5b9f\u969b\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u958b\u767a\u306e\u4e2d\u3067SQLAlchemy\u306f\u3069\u306e\u3088\u3046\u306b\u6d3b\u7528\u3055\u308c\u308b\u306e\u3067\u3057\u3087\u3046\u304b\u3002\u3053\u3053\u304b\u3089\u306f\u3001SQLAlchemy\u3092\u4f7f\u3063\u305fWeb\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u958b\u767a\u306e\u5927\u307e\u304b\u306a\u6d41\u308c\u3092\u8ffd\u3063\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
\u30c6\u30fc\u30d6\u30eb\u8a2d\u8a08\u304b\u3089\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30b3\u30fc\u30c9\u306e\u5b9f\u88c5\u307e\u3067\u306e\u57fa\u672c\u7684\u306a\u6d41\u308c<\/h3>\n\n\n\n
SQLAlchemy\u3092\u4f7f\u3063\u305fWeb\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u958b\u767a\u3067\u306f\u3001\u307e\u305a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u8a2d\u8a08\u304b\u3089\u59cb\u3081\u307e\u3059\u3002\u30c6\u30fc\u30d6\u30eb\u8a2d\u8a08\u3092\u884c\u3044\u3001ER\u56f3\u306a\u3069\u3067\u5168\u4f53\u50cf\u3092\u6574\u7406\u3057\u305f\u3089\u3001\u5404\u30c6\u30fc\u30d6\u30eb\u306b\u5bfe\u5fdc\u3059\u308bSQLAlchemy\u306e\u30e2\u30c7\u30eb\u5b9a\u7fa9\u3092\u884c\u3044\u307e\u3059\u3002<\/p>\n\n\n\n
from sqlalchemy import Column, Integer, String, ForeignKey\nfrom sqlalchemy.orm import relationship\nfrom sqlalchemy.ext.declarative import declarative_base\n\nBase = declarative_base()\n\nclass User(Base):\n __tablename__ = 'users'\n id = Column(Integer, primary_key=True)\n name = Column(String)\n email = Column(String, unique=True)\n posts = relationship(\"Post\", back_populates=\"author\")\n\nclass Post(Base):\n __tablename__ = 'posts'\n id = Column(Integer, primary_key=True)\n title = Column(String)\n content = Column(String)\n author_id = Column(Integer, ForeignKey('users.id'))\n author = relationship(\"User\", back_populates=\"posts\")<\/pre>\n\n\n\n\u30e2\u30c7\u30eb\u304c\u5b9a\u7fa9\u3067\u304d\u305f\u3089\u3001\u30de\u30a4\u30b0\u30ec\u30fc\u30b7\u30e7\u30f3\u30d5\u30a1\u30a4\u30eb\u3092\u4f5c\u6210\u3057\u3001\u5b9f\u969b\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u30c6\u30fc\u30d6\u30eb\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002\u30de\u30a4\u30b0\u30ec\u30fc\u30b7\u30e7\u30f3\u30d5\u30a1\u30a4\u30eb\u306f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u7ba1\u7406\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p>\n\n\n\n
\u6b21\u306b\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30ed\u30b8\u30c3\u30af\u306e\u5b9f\u88c5\u306b\u79fb\u308a\u307e\u3059\u3002\u30d3\u30b8\u30cd\u30b9\u30ed\u30b8\u30c3\u30af\u3092\u5b9f\u88c5\u3057\u3001SQLAlchemy\u3092\u4f7f\u3063\u3066\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3078\u306eCRUD\u64cd\u4f5c\u3092\u884c\u3046\u30b3\u30fc\u30c9\u3092\u66f8\u3044\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
from sqlalchemy import create_engine\nfrom sqlalchemy.orm import sessionmaker\n\nengine = create_engine('sqlite:\/\/\/example.db')\nSession = sessionmaker(bind=engine)\nsession = Session()\n\n# Create\nuser = User(name=\"John Doe\", email=\"john@example.com\")\nsession.add(user)\nsession.commit()\n\n# Read\nuser = session.query(User).filter(User.id == 1).first()\n\n# Update\nuser.name = \"John Smith\"\nsession.commit()\n\n# Delete\nsession.delete(user)\nsession.commit()<\/pre>\n\n\n\n\u6700\u5f8c\u306b\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30c6\u30b9\u30c8\u3092\u884c\u3044\u307e\u3059\u3002\u5358\u4f53\u30c6\u30b9\u30c8\u3067\u306f\u3001\u5404\u30e2\u30c7\u30eb\u3084\u30d3\u30b8\u30cd\u30b9\u30ed\u30b8\u30c3\u30af\u306e\u52d5\u4f5c\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002\u7d71\u5408\u30c6\u30b9\u30c8\u3067\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5168\u4f53\u306e\u52d5\u4f5c\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002\u30c6\u30b9\u30c8\u306b\u306f\u3001\u30c6\u30b9\u30c8\u7528\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u7528\u610f\u3059\u308b\u3068\u826f\u3044\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n
\u958b\u767a\u306e\u969b\u306b\u6c17\u3092\u3064\u3051\u308b\u3079\u304d\u30dd\u30a4\u30f3\u30c8<\/h3>\n\n\n\n
SQLAlchemy\u3092\u4f7f\u3063\u305fWeb\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u958b\u767a\u3067\u306f\u3001\u3044\u304f\u3064\u304b\u6c17\u3092\u3064\u3051\u308b\u3079\u304d\u30dd\u30a4\u30f3\u30c8\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
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\u30de\u30a4\u30b0\u30ec\u30fc\u30b7\u30e7\u30f3\u30d5\u30a1\u30a4\u30eb\u306fGit\u306a\u3069\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u7ba1\u7406\u30b7\u30b9\u30c6\u30e0\u3067\u7ba1\u7406\u3057\u307e\u3057\u3087\u3046\u3002\u30c1\u30fc\u30e0\u3067\u958b\u767a\u3059\u308b\u5834\u5408\u3001\u30de\u30a4\u30b0\u30ec\u30fc\u30b7\u30e7\u30f3\u30d5\u30a1\u30a4\u30eb\u306e\u7af6\u5408\u306b\u306f\u7279\u306b\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n\n\n\n
\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u89b3\u70b9\u304b\u3089\u306f\u3001N+1\u554f\u984c\u306b\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002\u95a2\u9023\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u307e\u3068\u3081\u3066\u53d6\u5f97\u3059\u308b\u3088\u3046\u306b\u3057\u3001\u4e0d\u8981\u306a\u30c7\u30fc\u30bf\u3092\u30ed\u30fc\u30c9\u3057\u306a\u3044\u3088\u3046\u306b\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n
\u6700\u5f8c\u306b\u3001\u30c6\u30b9\u30c8\u3092\u5145\u5b9f\u3055\u305b\u308b\u3053\u3068\u3092\u5fd8\u308c\u3066\u306f\u3044\u3051\u307e\u305b\u3093\u3002\u30e2\u30c7\u30eb\u306eCRUD\u64cd\u4f5c\u3084\u3001\u30d3\u30b8\u30cd\u30b9\u30ed\u30b8\u30c3\u30af\u304c\u6b63\u3057\u304f\u52d5\u4f5c\u3059\u308b\u304b\u3092\u78ba\u8a8d\u3059\u308b\u30c6\u30b9\u30c8\u3092\u66f8\u304f\u3088\u3046\u306b\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n
\u3053\u306e\u3088\u3046\u306b\u3001SQLAlchemy\u3092\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001Python\u3067\u306e\u751f\u7523\u7684\u306aWeb\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u958b\u767a\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002\u958b\u767a\u306e\u6d41\u308c\u3092\u7406\u89e3\u3057\u3001\u6ce8\u610f\u70b9\u3092\u8e0f\u307e\u3048\u3066\u9069\u5207\u306b\u4f7f\u3044\u3053\u306a\u305b\u3070\u3001SQLAlchemy\u306f\u3042\u306a\u305f\u306e\u5f37\u529b\u306a\u958b\u767a\u30d1\u30fc\u30c8\u30ca\u30fc\u306b\u306a\u308b\u306f\u305a\u3067\u3059\u3002
<\/p>\n\n\n\n
\u307e\u3068\u3081 \u2013 SQLAlchemy\u3092\u4f7f\u3044\u3053\u306a\u3059\u305f\u3081\u306b\u5927\u5207\u306a\u3053\u3068<\/h2>\n\n\n\n
\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001Python\u306eORM\u3067\u3042\u308bSQLAlchemy\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u89e3\u8aac\u3057\u3066\u304d\u307e\u3057\u305f\u3002SQLAlchemy\u306f\u3001SQL\u3092\u76f4\u63a5\u66f8\u304b\u305a\u306bPython\u306e\u30b3\u30fc\u30c9\u3067\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u64cd\u4f5c\u3067\u304d\u308b\u5f37\u529b\u306a\u30c4\u30fc\u30eb\u3067\u3042\u308a\u3001Web\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u958b\u767a\u306e\u751f\u7523\u6027\u3092\u5927\u304d\u304f\u5411\u4e0a\u3055\u305b\u3066\u304f\u308c\u307e\u3059\u3002<\/p>\n\n\n\n
SQLAlchemy\u3092\u4f7f\u3044\u3053\u306a\u3059\u305f\u3081\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u70b9\u304c\u7279\u306b\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n
SQLAlchemy\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u3092\u30de\u30b9\u30bf\u30fc\u3059\u308b<\/h3>\n\n\n\n\n- \u30a8\u30f3\u30b8\u30f3\u3068\u30bb\u30c3\u30b7\u30e7\u30f3\u306e\u6982\u5ff5\u3092\u7406\u89e3\u3059\u308b<\/li>\n\n\n\n
- \u30e2\u30c7\u30eb\u306e\u5b9a\u7fa9\u65b9\u6cd5\u3092\u7fd2\u5f97\u3059\u308b<\/li>\n\n\n\n
- \u30af\u30a8\u30ea\u306e\u5b9f\u884c\u65b9\u6cd5\u3092\u899a\u3048\u308b<\/li>\n<\/ul>\n\n\n\n
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- N+1\u554f\u984c\u3092\u56de\u907f\u3059\u308b\u305f\u3081\u306b\u3001\u30a4\u30fc\u30ac\u30fc\u30ed\u30fc\u30c9\u3092\u6d3b\u7528\u3059\u308b<\/li>\n\n\n\n
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- \u30de\u30a4\u30b0\u30ec\u30fc\u30b7\u30e7\u30f3\u30d5\u30a1\u30a4\u30eb\u306f\u30d0\u30fc\u30b8\u30e7\u30f3\u7ba1\u7406\u3059\u308b<\/li>\n\n\n\n
- \u30c6\u30b9\u30c8\u3092\u5145\u5b9f\u3055\u305b\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u54c1\u8cea\u3092\u4fdd\u8a3c\u3059\u308b<\/li>\n<\/ul>\n\n\n\n
SQLAlchemy\u306e\u7279\u6027\u3092\u3088\u304f\u7406\u89e3\u3059\u308b<\/h3>\n\n\n\n\n- SQLAlchemy\u306e\u30e1\u30ea\u30c3\u30c8\u3092\u6d3b\u304b\u3057\u3064\u3064\u3001\u30c7\u30e1\u30ea\u30c3\u30c8\u3082\u8003\u616e\u3059\u308b<\/li>\n\n\n\n
- \u72b6\u6cc1\u306b\u5fdc\u3058\u3066\u3001\u751f\u306eSQL\u3092\u66f8\u304f\u3053\u3068\u3082\u691c\u8a0e\u3059\u308b<\/li>\n\n\n\n
- SQL\u306e\u77e5\u8b58\u3092\u8eab\u306b\u3064\u3051\u3001SQLAlchemy\u306e\u62bd\u8c61\u5316\u3092\u7406\u89e3\u3059\u308b<\/li>\n<\/ul>\n\n\n\n
SQLAlchemy\u306f\u4e07\u80fd\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u304c\u3001\u9069\u6750\u9069\u6240\u3067\u4f7f\u3046\u3053\u3068\u3067\u958b\u767a\u306e\u751f\u7523\u6027\u3068\u54c1\u8cea\u3092\u5927\u304d\u304f\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3067\u3057\u3087\u3046\u3002\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u304b\u3089\u3001\u5b9f\u8df5\u7684\u306aTips\u307e\u3067\u3001\u3053\u306e\u8a18\u4e8b\u3067\u7d39\u4ecb\u3057\u305f\u5185\u5bb9\u3092\u6d3b\u304b\u3057\u3066\u3001\u305c\u3072\u7686\u3055\u3093\u306e\u958b\u767a\u306bSQLAlchemy\u3092\u5f79\u7acb\u3066\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n
SQLAlchemy\u306f\u5965\u306e\u6df1\u3044\u30c4\u30fc\u30eb\u3067\u3042\u308a\u3001\u3053\u3053\u3067\u7d39\u4ecb\u3057\u305f\u5185\u5bb9\u306f\u307b\u3093\u306e\u4e00\u90e8\u306b\u904e\u304e\u307e\u305b\u3093\u3002\u516c\u5f0f\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3092\u8aad\u307f\u8fbc\u307f\u3001\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3092\u66f8\u3044\u3066\u52d5\u304b\u3057\u3066\u307f\u308b\u306a\u3069\u3001\u5b9f\u969b\u306b\u624b\u3092\u52d5\u304b\u3057\u306a\u304c\u3089\u5b66\u3093\u3067\u3044\u304f\u3053\u3068\u3092\u304a\u3059\u3059\u3081\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
\u307e\u305f\u3001SQL\u306e\u77e5\u8b58\u3082\u5927\u5207\u3067\u3059\u3002SQLAlchemy\u306fSQL\u3092\u62bd\u8c61\u5316\u3057\u3066\u304f\u308c\u307e\u3059\u304c\u3001\u305d\u306e\u4ed5\u7d44\u307f\u3092\u7406\u89e3\u3059\u308b\u306b\u306fSQL\u306e\u77e5\u8b58\u304c\u6b20\u304b\u305b\u307e\u305b\u3093\u3002SQL\u306e\u6559\u79d1\u66f8\u3092\u8aad\u3093\u3060\u308a\u3001\u5b9f\u969b\u306bSQL\u3092\u66f8\u3044\u3066\u307f\u305f\u308a\u3057\u306a\u304c\u3089\u3001SQL\u306e\u77e5\u8b58\u3092\u6df1\u3081\u3066\u3044\u304f\u3068\u826f\u3044\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n
Python\u3067\u306eWeb\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u958b\u767a\u306b\u3001\u305c\u3072SQLAlchemy\u3092\u6d3b\u7528\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002\u751f\u7523\u6027\u306e\u9ad8\u3044\u958b\u767a\u3068\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u9ad8\u3044\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u5b9f\u73fe\u306b\u3001\u304d\u3063\u3068\u5f79\u7acb\u3063\u3066\u304f\u308c\u308b\u306f\u305a\u3067\u3059\u3002<\/p>\n\n\n\n
Happy coding!
<\/p>\n","protected":false},"excerpt":{"rendered":"
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