pydantic\u306f\u3001Python\u3067\u306e\u30c7\u30fc\u30bf\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3068\u30b7\u30ea\u30a2\u30e9\u30a4\u30bc\u30fc\u30b7\u30e7\u30f3\u3092\u7c21\u5358\u304b\u3064\u52b9\u679c\u7684\u306b\u884c\u3046\u305f\u3081\u306e\u5f37\u529b\u306a\u30e9\u30a4\u30d6\u30e9\u30ea\u3067\u3059\u3002\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001pydantic\u306e\u57fa\u672c\u7684\u306a\u6a5f\u80fd\u3068\u4f7f\u3044\u65b9\u304b\u3089\u3001\u767a\u5c55\u7684\u306a\u6d3b\u7528\u65b9\u6cd5\u307e\u3067\u3001\u521d\u5fc3\u8005\u306b\u3082\u308f\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u3057\u307e\u3059\u3002pydantic\u3092\u4f7f\u3044\u3053\u306a\u3059\u3053\u3068\u3067\u3001Python\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u306e\u751f\u7523\u6027\u3068\u54c1\u8cea\u3092\u5927\u5e45\u306b\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n
\u76ee\u6b21 <\/p>\n
pydantic\u306f\u3001Python\u306e\u30c7\u30fc\u30bf\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3068\u30b7\u30ea\u30a2\u30e9\u30a4\u30bc\u30fc\u30b7\u30e7\u30f3\u3092\u7c21\u5358\u304b\u3064\u52b9\u679c\u7684\u306b\u884c\u3046\u305f\u3081\u306e\u30e9\u30a4\u30d6\u30e9\u30ea\u3067\u3059\u3002\u578b\u30d2\u30f3\u30c8\u3092\u4f7f\u3063\u3066\u30c7\u30fc\u30bf\u306e\u69cb\u9020\u3092\u5b9a\u7fa9\u3057\u3001\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u30eb\u30fc\u30eb\u3092\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u3067\u3001\u30c7\u30fc\u30bf\u306e\u6574\u5408\u6027\u3092\u4fdd\u3061\u306a\u304c\u3089\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3068\u4fdd\u5b88\u6027\u3092\u9ad8\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
pydantic\u306e\u4e3b\u306a\u6a5f\u80fd\u306f\u3001\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n\n\n\n
\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\uff1a<\/p>\n\n\n\n
from pydantic import BaseModel, Field\n\nclass User(BaseModel):\n id: int\n name: str = Field(..., min_length=2, max_length=50)\n email: str\n\n# \u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\nuser_data = {\"id\": 123, \"name\": \"John\", \"email\": \"john@example.com\"}\nuser = User(**user_data)\n\n# \u30b7\u30ea\u30a2\u30e9\u30a4\u30bc\u30fc\u30b7\u30e7\u30f3\nuser_json = user.json()<\/pre>\n\n\n\npydantic\u3092\u4f7f\u3046\u30e1\u30ea\u30c3\u30c8 \u2013 \u52b9\u7387\u7684\u3067\u5b89\u5168\u306a\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0<\/h3>\n\n\n\n
pydantic\u3092\u4f7f\u3046\u3053\u3068\u3067\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30e1\u30ea\u30c3\u30c8\u304c\u5f97\u3089\u308c\u307e\u3059\u3002<\/p>\n\n\n\n
\n- \u30c7\u30fc\u30bf\u306e\u6574\u5408\u6027\u3092\u4fdd\u3061\u3001\u30d0\u30b0\u3092\u9632\u6b62\u3067\u304d\u308b\uff1a\u578b\u30d2\u30f3\u30c8\u3068\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u30eb\u30fc\u30eb\u3092\u5b9a\u7fa9\u3059\u308b\u3053\u3068\u3067\u3001\u7121\u52b9\u306a\u30c7\u30fc\u30bf\u304c\u5165\u308a\u8fbc\u3080\u3053\u3068\u3092\u9632\u304e\u3001\u30c7\u30fc\u30bf\u306b\u95a2\u9023\u3059\u308b\u30d0\u30b0\u3092\u6e1b\u3089\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/li>\n\n\n\n
- \u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3068\u4fdd\u5b88\u6027\u304c\u5411\u4e0a\u3059\u308b\uff1a\u578b\u30d2\u30f3\u30c8\u3092\u4f7f\u3063\u3066\u30c7\u30fc\u30bf\u306e\u69cb\u9020\u3092\u660e\u793a\u3059\u308b\u3053\u3068\u3067\u3001\u30b3\u30fc\u30c9\u306e\u610f\u56f3\u304c\u660e\u78ba\u306b\u306a\u308a\u3001\u53ef\u8aad\u6027\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002\u307e\u305f\u3001\u30c7\u30fc\u30bf\u306e\u69cb\u9020\u304c\u4e00\u76ee\u77ad\u7136\u306a\u306e\u3067\u3001\u30b3\u30fc\u30c9\u306e\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u304c\u3057\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002<\/li>\n\n\n\n
- API\u306e\u958b\u767a\u3084\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3068\u306e\u9023\u643a\u304c\u30b9\u30e0\u30fc\u30ba\u306b\u306a\u308b\uff1apydantic\u3092\u4f7f\u3063\u3066\u30c7\u30fc\u30bf\u30e2\u30c7\u30eb\u3092\u5b9a\u7fa9\u3059\u308b\u3053\u3068\u3067\u3001API\u306e\u30ea\u30af\u30a8\u30b9\u30c8\u3068\u30ec\u30b9\u30dd\u30f3\u30b9\u306e\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3092\u7c21\u5358\u306b\u5b9f\u88c5\u3067\u304d\u307e\u3059\u3002\u307e\u305f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3068\u306e\u30c7\u30fc\u30bf\u306e\u3084\u308a\u53d6\u308a\u3082\u30b9\u30e0\u30fc\u30ba\u306b\u884c\u3048\u307e\u3059\u3002<\/li>\n\n\n\n
- \u578b\u30d2\u30f3\u30c8\u3092\u6d3b\u7528\u3067\u304d\u3001\u958b\u767a\u306e\u751f\u7523\u6027\u304c\u4e0a\u304c\u308b\uff1a\u578b\u30d2\u30f3\u30c8\u3092\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30b3\u30fc\u30c9\u88dc\u5b8c\u306a\u3069\u306eIDE\u306e\u6a5f\u80fd\u3092\u30d5\u30eb\u6d3b\u7528\u3067\u304d\u3001\u958b\u767a\u306e\u751f\u7523\u6027\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n\n\n\n
pydantic\u306f\u3001\u30c7\u30fc\u30bf\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3068\u30b7\u30ea\u30a2\u30e9\u30a4\u30bc\u30fc\u30b7\u30e7\u30f3\u3092\u7c21\u5358\u304b\u3064\u52b9\u679c\u7684\u306b\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u308b\u5f37\u529b\u306a\u30e9\u30a4\u30d6\u30e9\u30ea\u3067\u3059\u3002\u578b\u30d2\u30f3\u30c8\u3068\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u30b3\u30fc\u30c9\u306e\u54c1\u8cea\u3068\u958b\u767a\u52b9\u7387\u3092\u9ad8\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n
pydantic\u306e\u4f7f\u3044\u65b9 \u2013 \u30e2\u30c7\u30eb\u5b9a\u7fa9\u304b\u3089\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u307e\u3067\u306e\u6d41\u308c<\/h2>\n\n\n\n
pydantic\u3092\u4f7f\u3063\u305f\u30c7\u30fc\u30bf\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u306e\u57fa\u672c\u7684\u306a\u6d41\u308c\u306f\u3001\u4ee5\u4e0b\u306e4\u3064\u306e\u30b9\u30c6\u30c3\u30d7\u304b\u3089\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
\n- BaseModel\u30af\u30e9\u30b9\u3092\u7d99\u627f\u3057\u3066\u3001\u30c7\u30fc\u30bf\u30e2\u30c7\u30eb\u3092\u5b9a\u7fa9\u3059\u308b<\/li>\n\n\n\n
- \u5404\u30d5\u30a3\u30fc\u30eb\u30c9\u306b\u578b\u3092\u6307\u5b9a\u3057\u3001\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u30eb\u30fc\u30eb\u3092\u8a2d\u5b9a\u3059\u308b<\/li>\n\n\n\n
- \u30c7\u30fc\u30bf\u3092\u53d7\u3051\u53d6\u3063\u305f\u3089\u3001\u30e2\u30c7\u30eb\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306b\u6e21\u3057\u3066\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3092\u5b9f\u884c\u3059\u308b<\/li>\n\n\n\n
- \u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u306f\u3001\u9069\u5207\u306b\u30a8\u30e9\u30fc\u3092\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u3059\u308b<\/li>\n<\/ol>\n\n\n\n
\u305d\u308c\u3067\u306f\u3001\u5404\u30b9\u30c6\u30c3\u30d7\u3092\u8a73\u3057\u304f\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n
\u30e2\u30c7\u30eb\u306e\u5b9a\u7fa9\u65b9\u6cd5 \u2013 BaseModel\u30af\u30e9\u30b9\u3092\u7d99\u627f<\/h3>\n\n\n\n
pydantic\u3067\u30e2\u30c7\u30eb\u3092\u5b9a\u7fa9\u3059\u308b\u306b\u306f\u3001BaseModel\u30af\u30e9\u30b9\u3092\u7d99\u627f\u3057\u3066\u65b0\u3057\u3044\u30e2\u30c7\u30eb\u30af\u30e9\u30b9\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002\u5404\u30d5\u30a3\u30fc\u30eb\u30c9\u306f\u3001\u30d5\u30a3\u30fc\u30eb\u30c9\u540d: \u578b<\/code>\u306e\u5f62\u5f0f\u3067\u5b9a\u7fa9\u3057\u307e\u3059\u3002<\/p>\n\n\n\nfrom pydantic import BaseModel\n\nclass User(BaseModel):\n id: int\n name: str\n email: str<\/pre>\n\n\n\n\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u578b\u3092\u6307\u5b9a\u3059\u308b \u2013 str, int, float\u306a\u3069<\/h3>\n\n\n\n
\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u578b\u306f\u3001str, int, float, bool\u306a\u3069\u306e\u57fa\u672c\u7684\u306a\u578b\u3092\u6307\u5b9a\u3067\u304d\u307e\u3059\u3002\u307e\u305f\u3001list\u3084dict\u306a\u3069\u306e\u8907\u5408\u578b\u3082\u6307\u5b9a\u53ef\u80fd\u3067\u3059\u3002\u3055\u3089\u306b\u3001\u81ea\u4f5c\u306e\u30af\u30e9\u30b9\u3092\u578b\u3068\u3057\u3066\u6307\u5b9a\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
from pydantic import BaseModel\n\nclass Address(BaseModel):\n street: str\n city: str\n country: str\n\nclass User(BaseModel):\n id: int\n name: str\n email: str\n address: Address<\/pre>\n\n\n\n\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u8a2d\u5b9a \u2013 \u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u3084\u5236\u7d04\u306e\u4ed8\u3051\u65b9<\/h3>\n\n\n\n
\u30d5\u30a3\u30fc\u30eb\u30c9\u306b\u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u3084\u5236\u7d04\u3092\u8a2d\u5b9a\u3067\u304d\u307e\u3059\u3002\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u306fdefault=\u5024<\/code>\u306e\u5f62\u5f0f\u3067\u3001\u5fc5\u9808\u30d5\u30a3\u30fc\u30eb\u30c9\u306fdefault=Field(...)<\/code>\u306e\u5f62\u5f0f\u3067\u6307\u5b9a\u3057\u307e\u3059\u3002\u5024\u306e\u7bc4\u56f2\u306f\u3001ge=\u6700\u5c0f\u5024, le=\u6700\u5927\u5024<\/code>\u306e\u5f62\u5f0f\u3067\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n\n\n\nfrom pydantic import BaseModel, Field\n\nclass User(BaseModel):\n id: int\n name: str = Field(..., min_length=2, max_length=50)\n email: str\n age: int = Field(default=18, ge=18, le=120)<\/pre>\n\n\n\n\u30cd\u30b9\u30c8\u3057\u305f\u30e2\u30c7\u30eb\u306e\u5b9a\u7fa9\u65b9\u6cd5<\/h3>\n\n\n\n
\u8907\u96d1\u306a\u69cb\u9020\u306e\u30c7\u30fc\u30bf\u3092\u8868\u73fe\u3059\u308b\u305f\u3081\u306b\u3001\u30e2\u30c7\u30eb\u3092\u30cd\u30b9\u30c8\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u89aa\u30e2\u30c7\u30eb\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u306b\u3001\u5b50\u30e2\u30c7\u30eb\u306e\u578b\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
from pydantic import BaseModel\n\nclass Address(BaseModel):\n street: str\n city: str\n country: str\n\nclass User(BaseModel):\n id: int\n name: str\n email: str\n address: Address<\/pre>\n\n\n\n\u30e2\u30c7\u30eb\u306e\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u65b9\u6cd5<\/h3>\n\n\n\n
\u30e2\u30c7\u30eb\u306e\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3092\u5b9f\u884c\u3059\u308b\u306b\u306f\u3001\u30e2\u30c7\u30eb\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306b\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u5bfe\u8c61\u306e\u30c7\u30fc\u30bf\u3092\u6e21\u3057\u307e\u3059\u3002\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u306a\u3051\u308c\u3070\u3001\u30e2\u30c7\u30eb\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u304c\u8fd4\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n
from pydantic import BaseModel\n\nclass User(BaseModel):\n id: int\n name: str\n email: str\n\nuser_data = {\"id\": 123, \"name\": \"John Doe\", \"email\": \"john@example.com\"}\nuser = User(**user_data)\nprint(user) # User(id=123, name='John Doe', email='john@example.com')<\/pre>\n\n\n\n\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u30a8\u30e9\u30fc\u306e\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0<\/h3>\n\n\n\n
\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u306f\u3001ValidationError\u304craise\u3055\u308c\u307e\u3059\u3002try\u2026except\u3092\u4f7f\u3063\u3066\u3053\u306e\u30a8\u30e9\u30fc\u3092\u30ad\u30e3\u30c3\u30c1\u3057\u3001\u9069\u5207\u306a\u30a8\u30e9\u30fc\u51e6\u7406\u3092\u884c\u3044\u307e\u3059\u3002<\/p>\n\n\n\n
from pydantic import BaseModel, ValidationError\n\nclass User(BaseModel):\n id: int\n name: str\n email: str\n\ntry:\n user_data = {\"id\": 123, \"name\": \"John Doe\", \"email\": \"invalid_email\"}\n user = User(**user_data)\nexcept ValidationError as e:\n print(e.json())<\/pre>\n\n\n\n\u4ee5\u4e0a\u304c\u3001pydantic\u3092\u4f7f\u3063\u305f\u30c7\u30fc\u30bf\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u306e\u57fa\u672c\u7684\u306a\u6d41\u308c\u3067\u3059\u3002\u30e2\u30c7\u30eb\u306e\u5b9a\u7fa9\u3001\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u578b\u6307\u5b9a\u3001\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u8a2d\u5b9a\u3001\u30cd\u30b9\u30c8\u3057\u305f\u30e2\u30c7\u30eb\u306e\u5b9a\u7fa9\u3001\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u306e\u5b9f\u884c\u3001\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306b\u3064\u3044\u3066\u7406\u89e3\u3092\u6df1\u3081\u308b\u3053\u3068\u3067\u3001\u52b9\u7387\u7684\u304b\u3064\u5b89\u5168\u306a\u30c7\u30fc\u30bf\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3092\u5b9f\u73fe\u3067\u304d\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n
pydantic\u306e\u6d3b\u7528\u4f8b \u2013 API\u3084\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3068\u306e\u9023\u643a<\/h2>\n\n\n\n
pydantic\u306f\u3001FastAPI\u3084\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3068\u306e\u9023\u643a\u306b\u975e\u5e38\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u3001\u305d\u308c\u305e\u308c\u306e\u6d3b\u7528\u4f8b\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n
FastAPI\u3068\u7d44\u307f\u5408\u308f\u305b\u3066\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3<\/h3>\n\n\n\n
FastAPI\u306f\u3001Python\u306eWeb\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3067\u3001API\u306e\u958b\u767a\u306b\u7279\u5316\u3057\u3066\u3044\u307e\u3059\u3002FastAPI\u306b\u306f\u3001pydantic\u304c\u7d44\u307f\u8fbc\u307e\u308c\u3066\u304a\u308a\u3001\u30ea\u30af\u30a8\u30b9\u30c8\u3068\u30ec\u30b9\u30dd\u30f3\u30b9\u306e\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002API\u306e\u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\u3092\u5b9a\u7fa9\u3059\u308b\u969b\u306b\u3001pydantic\u306e\u30e2\u30c7\u30eb\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u81ea\u52d5\u7684\u306b\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u304c\u884c\u308f\u308c\u307e\u3059\u3002\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u3001FastAPI\u304c\u9069\u5207\u306a\u30a8\u30e9\u30fc\u30ec\u30b9\u30dd\u30f3\u30b9\u3092\u8fd4\u3057\u3066\u304f\u308c\u307e\u3059\u3002<\/p>\n\n\n\n
\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\uff08FastAPI + pydantic\uff09\uff1a<\/p>\n\n\n\n
from fastapi import FastAPI\nfrom pydantic import BaseModel\n\napp = FastAPI()\n\nclass Item(BaseModel):\n name: str\n price: float\n is_offer: bool = None\n\n@app.put(\"\/items\/{item_id}\")\ndef update_item(item_id: int, item: Item):\n return {\"item_name\": item.name, \"item_id\": item_id}<\/pre>\n\n\n\n\u3053\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001Item<\/code>\u3068\u3044\u3046pydantic\u30e2\u30c7\u30eb\u3092\u5b9a\u7fa9\u3057\u3001update_item<\/code>\u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\u306e\u5f15\u6570\u306b\u4f7f\u7528\u3057\u3066\u3044\u307e\u3059\u3002FastAPI\u306f\u3001\u30ea\u30af\u30a8\u30b9\u30c8\u30dc\u30c7\u30a3\u3092\u3053\u306e\u30e2\u30c7\u30eb\u306b\u5f93\u3063\u3066\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3057\u3001\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u30a8\u30e9\u30fc\u304c\u3042\u308c\u3070\u9069\u5207\u306a\u30a8\u30e9\u30fc\u30ec\u30b9\u30dd\u30f3\u30b9\u3092\u8fd4\u3057\u307e\u3059\u3002<\/p>\n\n\n\n\u3053\u306e\u4f8b\u3067\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30ea\u30af\u30a8\u30b9\u30c8\u30dc\u30c7\u30a3\u304c\u671f\u5f85\u3055\u308c\u307e\u3059\uff1a<\/p>\n\n\n\n
{\n \"name\": \"string\",\n \"price\": 0,\n \"is_offer\": true\n}<\/pre>\n\n\n\n\u3082\u3057\u3001\u30ea\u30af\u30a8\u30b9\u30c8\u30dc\u30c7\u30a3\u304cItem<\/code>\u30e2\u30c7\u30eb\u306e\u5b9a\u7fa9\u306b\u5f93\u3063\u3066\u3044\u306a\u3044\u5834\u5408\u3001FastAPI\u306f\u81ea\u52d5\u7684\u306b\u30a8\u30e9\u30fc\u30ec\u30b9\u30dd\u30f3\u30b9\u3092\u8fd4\u3057\u307e\u3059\u3002<\/p>\n\n\n\nDB\u3068\u306e\u30c7\u30fc\u30bf\u306e\u3084\u308a\u53d6\u308a\u306bpydantic\u3092\u4f7f\u3046<\/h3>\n\n\n\n
ORM\u3092\u4f7f\u3063\u3066\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3068\u3084\u308a\u53d6\u308a\u3059\u308b\u969b\u306b\u3001pydantic\u3092\u6d3b\u7528\u3067\u304d\u307e\u3059\u3002SQLAlchemy\u306a\u3069\u306eORM\u3068\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u30c6\u30fc\u30d6\u30eb\u5b9a\u7fa9\u3068pydantic\u306e\u30e2\u30c7\u30eb\u5b9a\u7fa9\u3092\u4e00\u81f4\u3055\u305b\u3089\u308c\u307e\u3059\u3002\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u304b\u3089\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3059\u308b\u969b\u306b\u3001pydantic\u306e\u30e2\u30c7\u30eb\u306b\u5909\u63db\u3059\u308b\u3053\u3068\u3067\u3001\u30c7\u30fc\u30bf\u306e\u6574\u5408\u6027\u3092\u4fdd\u3066\u307e\u3059\u3002\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u30c7\u30fc\u30bf\u3092\u4fdd\u5b58\u3059\u308b\u969b\u3082\u3001pydantic\u306e\u30e2\u30c7\u30eb\u3092\u4f7f\u3063\u3066\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3092\u884c\u3048\u307e\u3059\u3002<\/p>\n\n\n\n
\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\uff08SQLAlchemy + pydantic\uff09\uff1a<\/p>\n\n\n\n
from sqlalchemy.orm import Session\nfrom sqlalchemy.ext.declarative import declarative_base\nfrom sqlalchemy import Column, Integer, String, Float\nfrom pydantic import BaseModel\n\nBase = declarative_base()\n\nclass ItemORM(Base):\n __tablename__ = \"items\"\n id = Column(Integer, primary_key=True, index=True)\n name = Column(String, index=True)\n price = Column(Float)\n\nclass ItemBase(BaseModel):\n name: str\n price: float\n\nclass ItemCreate(ItemBase):\n pass\n\ndef create_item(db: Session, item: ItemCreate):\n db_item = ItemORM(**item.dict())\n db.add(db_item)\n db.commit()\n db.refresh(db_item)\n return db_item<\/pre>\n\n\n\n\u3053\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001ItemORM<\/code>\u3068\u3044\u3046SQLAlchemy\u306e\u30e2\u30c7\u30eb\u3068\u3001ItemBase<\/code>\u3068ItemCreate<\/code>\u3068\u3044\u3046pydantic\u306e\u30e2\u30c7\u30eb\u3092\u5b9a\u7fa9\u3057\u3066\u3044\u307e\u3059\u3002create_item<\/code>\u95a2\u6570\u3067\u306f\u3001ItemCreate<\/code>\u30e2\u30c7\u30eb\u3092\u53d7\u3051\u53d6\u308a\u3001\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3092\u884c\u3063\u305f\u4e0a\u3067\u3001ItemORM<\/code>\u30e2\u30c7\u30eb\u306b\u5909\u63db\u3057\u3066\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u4fdd\u5b58\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n\u3053\u308c\u3089\u306e\u4f8b\u304b\u3089\u308f\u304b\u308b\u3088\u3046\u306b\u3001pydantic\u3092FastAPI\u3084SQLAlchemy\u3068\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001API\u3084\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3068\u306e\u3084\u308a\u53d6\u308a\u3092\u3001\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3068\u3068\u3082\u306b\u30b9\u30e0\u30fc\u30ba\u306b\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002pydantic\u306e\u6d3b\u7528\u306b\u3088\u308a\u3001\u30c7\u30fc\u30bf\u306e\u6574\u5408\u6027\u3092\u4fdd\u3061\u3064\u3064\u3001\u52b9\u7387\u7684\u306a\u30b3\u30fc\u30c9\u958b\u767a\u304c\u53ef\u80fd\u306b\u306a\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n
pydantic\u306e\u305d\u306e\u4ed6\u306e\u6a5f\u80fd\u3068\u767a\u5c55\u7684\u306a\u4f7f\u3044\u65b9<\/h2>\n\n\n\n
pydantic\u306f\u3001\u57fa\u672c\u7684\u306a\u6a5f\u80fd\u306b\u52a0\u3048\u3066\u3001\u3088\u308a\u767a\u5c55\u7684\u306a\u4f7f\u3044\u65b9\u304c\u3067\u304d\u308b\u3088\u3046\u306b\u3055\u307e\u3056\u307e\u306a\u6a5f\u80fd\u3092\u63d0\u4f9b\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u3001\u305d\u306e\u4e2d\u304b\u3089\u3044\u304f\u3064\u304b\u306e\u6a5f\u80fd\u3092\u53d6\u308a\u4e0a\u3052\u3001\u8a73\u3057\u304f\u8aac\u660e\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
Field\u30af\u30e9\u30b9\u3092\u4f7f\u3063\u305f\u8a73\u7d30\u306a\u8a2d\u5b9a<\/h3>\n\n\n\n
Field\u30af\u30e9\u30b9\u3092\u4f7f\u3046\u3053\u3068\u3067\u3001\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u8a73\u7d30\u306a\u8a2d\u5b9a\u3092\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u306e\u8a2d\u5b9a\u3001\u5024\u306e\u5236\u7d04\u3001\u8aac\u660e\u6587\u306e\u8ffd\u52a0\u306a\u3069\u304c\u53ef\u80fd\u3067\u3059\u3002Field\u30af\u30e9\u30b9\u3092\u4f7f\u3046\u3053\u3068\u3067\u3001\u30e2\u30c7\u30eb\u306e\u5b9a\u7fa9\u304c\u3088\u308a\u660e\u78ba\u306b\u306a\u308a\u3001\u53ef\u8aad\u6027\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\uff08Field\u30af\u30e9\u30b9\u306e\u4f7f\u7528\u4f8b\uff09\uff1a<\/p>\n\n\n\n
from pydantic import BaseModel, Field\n\nclass User(BaseModel):\n name: str = Field(..., min_length=2, max_length=50, description=\"The user's name\")\n age: int = Field(18, ge=18, le=120, description=\"The user's age\")\n email: str = Field(..., regex=r\"^[a-zA-Z0-9_.+-]+@[a-zA-Z0-9-]+\\.[a-zA-Z0-9-.]+$\", description=\"The user's email address\")<\/pre>\n\n\n\n\u3053\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001name<\/code>\u30d5\u30a3\u30fc\u30eb\u30c9\u306b\u6700\u5c0f\u9577\u3068\u6700\u5927\u9577\u3001age<\/code>\u30d5\u30a3\u30fc\u30eb\u30c9\u306b\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u3068\u6700\u5c0f\u5024\u30fb\u6700\u5927\u5024\u3001email<\/code>\u30d5\u30a3\u30fc\u30eb\u30c9\u306b\u6b63\u898f\u8868\u73fe\u306b\u3088\u308b\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3092\u8a2d\u5b9a\u3057\u3066\u3044\u307e\u3059\u3002\u307e\u305f\u3001\u5404\u30d5\u30a3\u30fc\u30eb\u30c9\u306b\u8aac\u660e\u6587\u3092\u8ffd\u52a0\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n\u30ab\u30b9\u30bf\u30e0\u30c7\u30fc\u30bf\u578b\u306e\u5b9a\u7fa9\u65b9\u6cd5<\/h3>\n\n\n\n
pydantic\u3067\u306f\u3001\u30ab\u30b9\u30bf\u30e0\u30c7\u30fc\u30bf\u578b\u3092\u5b9a\u7fa9\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u72ec\u81ea\u306e\u578b\u30c1\u30a7\u30c3\u30af\u3068\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3092\u884c\u3046\u3053\u3068\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002\u30ab\u30b9\u30bf\u30e0\u30c7\u30fc\u30bf\u578b\u3092\u5b9a\u7fa9\u3059\u308b\u3053\u3068\u3067\u3001\u30c9\u30e1\u30a4\u30f3\u56fa\u6709\u306e\u5236\u7d04\u3092\u8868\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\uff08\u30ab\u30b9\u30bf\u30e0\u30c7\u30fc\u30bf\u578b\u306e\u5b9a\u7fa9\u4f8b\uff09\uff1a<\/p>\n\n\n\n
from pydantic import BaseModel, validator\n\nclass OddInt(int):\n @classmethod\n def __get_validators__(cls):\n yield cls.validate\n\n @classmethod\n def validate(cls, value):\n if not isinstance(value, int) or value % 2 == 0:\n raise ValueError(\"Value must be an odd integer\")\n return value\n\nclass MyModel(BaseModel):\n odd_number: OddInt<\/pre>\n\n\n\n\u3053\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001OddInt<\/code>\u3068\u3044\u3046\u30ab\u30b9\u30bf\u30e0\u30c7\u30fc\u30bf\u578b\u3092\u5b9a\u7fa9\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u578b\u306f\u3001\u5947\u6570\u306e\u6574\u6570\u306e\u307f\u3092\u53d7\u3051\u4ed8\u3051\u308b\u3088\u3046\u306b\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3092\u884c\u3044\u307e\u3059\u3002MyModel<\/code>\u30af\u30e9\u30b9\u3067\u306f\u3001odd_number<\/code>\u30d5\u30a3\u30fc\u30eb\u30c9\u306bOddInt<\/code>\u578b\u3092\u6307\u5b9a\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n\u30e2\u30c7\u30eb\u306e\u7d99\u627f\u3068\u30df\u30c3\u30af\u30b9\u30a4\u30f3<\/h3>\n\n\n\n
pydantic\u3067\u306f\u3001\u30e2\u30c7\u30eb\u306e\u7d99\u627f\u3068\u30df\u30c3\u30af\u30b9\u30a4\u30f3\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u307e\u3059\u3002\u7d99\u627f\u3092\u4f7f\u3046\u3053\u3068\u3067\u3001\u5171\u901a\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u89aa\u30af\u30e9\u30b9\u3067\u5b9a\u7fa9\u3057\u3001\u5b50\u30af\u30e9\u30b9\u3067\u518d\u5229\u7528\u3067\u304d\u307e\u3059\u3002\u30df\u30c3\u30af\u30b9\u30a4\u30f3\u3092\u4f7f\u3046\u3053\u3068\u3067\u3001\u8907\u6570\u306e\u30e2\u30c7\u30eb\u3067\u5171\u901a\u306e\u6a5f\u80fd\u3092\u5171\u6709\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30b3\u30fc\u30c9\u306e\u518d\u5229\u7528\u6027\u3092\u9ad8\u3081\u3001\u3088\u308a\u67d4\u8edf\u306b\u30e2\u30c7\u30eb\u3092\u5b9a\u7fa9\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\uff08\u30e2\u30c7\u30eb\u306e\u7d99\u627f\u3068\u30df\u30c3\u30af\u30b9\u30a4\u30f3\u306e\u4f8b\uff09\uff1a<\/p>\n\n\n\n
from pydantic import BaseModel\nfrom datetime import datetime\n\nclass TimestampMixin(BaseModel):\n created_at: datetime\n updated_at: datetime\n\nclass User(TimestampMixin):\n id: int\n name: str\n email: str\n\nclass Post(TimestampMixin):\n id: int\n title: str\n content: str\n author: User<\/pre>\n\n\n\n\u3053\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001TimestampMixin<\/code>\u3068\u3044\u3046\u30df\u30c3\u30af\u30b9\u30a4\u30f3\u30af\u30e9\u30b9\u3092\u5b9a\u7fa9\u3057\u3001created_at<\/code>\u3068updated_at<\/code>\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u542b\u3081\u3066\u3044\u307e\u3059\u3002User<\/code>\u30af\u30e9\u30b9\u3068Post<\/code>\u30af\u30e9\u30b9\u306f\u3001\u3068\u3082\u306bTimestampMixin<\/code>\u3092\u7d99\u627f\u3057\u3066\u3044\u308b\u305f\u3081\u3001\u3053\u308c\u3089\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u6301\u3064\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n\u4ee5\u4e0a\u306e\u3088\u3046\u306b\u3001pydantic\u306f\u8c4a\u5bcc\u306a\u6a5f\u80fd\u3092\u63d0\u4f9b\u3057\u3066\u304a\u308a\u3001Field\u30af\u30e9\u30b9\u3092\u4f7f\u3063\u305f\u8a73\u7d30\u306a\u8a2d\u5b9a\u3001\u30ab\u30b9\u30bf\u30e0\u30c7\u30fc\u30bf\u578b\u306e\u5b9a\u7fa9\u3001\u30e2\u30c7\u30eb\u306e\u7d99\u627f\u3068\u30df\u30c3\u30af\u30b9\u30a4\u30f3\u306a\u3069\u306e\u767a\u5c55\u7684\u306a\u4f7f\u3044\u65b9\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u6a5f\u80fd\u3092\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u67d4\u8edf\u3067\u518d\u5229\u7528\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u308b\u3067\u3057\u3087\u3046\u3002pydantic\u306e\u6a5f\u80fd\u3092\u5341\u5206\u306b\u7406\u89e3\u3057\u3001\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u54c1\u8cea\u3068\u958b\u767a\u52b9\u7387\u3092\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
\u307e\u3068\u3081 \u2013 pydantic\u3067Python\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u306e\u751f\u7523\u6027\u3068\u54c1\u8cea\u3092\u9ad8\u3081\u3088\u3046\uff01<\/h2>\n\n\n\n
pydantic\u306f\u3001Python\u3067\u306e\u30c7\u30fc\u30bf\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3068\u30b7\u30ea\u30a2\u30e9\u30a4\u30bc\u30fc\u30b7\u30e7\u30f3\u3092\u7c21\u5358\u304b\u3064\u52b9\u679c\u7684\u306b\u884c\u3046\u305f\u3081\u306e\u5f37\u529b\u306a\u30c4\u30fc\u30eb\u3067\u3059\u3002pydantic\u3092\u4f7f\u3046\u3053\u3068\u3067\u3001\u30d0\u30b0\u306e\u65e9\u671f\u767a\u898b\u3068\u9632\u6b62\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3068\u4fdd\u5b88\u6027\u306e\u5411\u4e0a\u3001\u958b\u767a\u901f\u5ea6\u306e\u5411\u4e0a\u3001API\u3084\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3068\u306e\u9023\u643a\u306e\u5bb9\u6613\u3055\u306a\u3069\u3001\u3055\u307e\u3056\u307e\u306a\u30e1\u30ea\u30c3\u30c8\u3092\u5f97\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
pydantic\u3092\u6d3b\u7528\u3057\u3066Python\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u306e\u751f\u7523\u6027\u3068\u54c1\u8cea\u3092\u9ad8\u3081\u308b\u305f\u3081\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u70b9\u306b\u6ce8\u610f\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n
\n- \u578b\u30d2\u30f3\u30c8\u3092\u7a4d\u6975\u7684\u306b\u4f7f\u3046\n
\n- \u578b\u30d2\u30f3\u30c8\u3092\u4f7f\u3046\u3053\u3068\u3067\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3068\u4fdd\u5b88\u6027\u304c\u5411\u4e0a\u3057\u307e\u3059<\/li>\n\n\n\n
- pydantic\u306e\u6a5f\u80fd\u3092\u6700\u5927\u9650\u306b\u6d3b\u7528\u3059\u308b\u305f\u3081\u306b\u3082\u3001\u578b\u30d2\u30f3\u30c8\u306f\u6b20\u304b\u305b\u307e\u305b\u3093<\/li>\n<\/ul>\n<\/li>\n\n\n\n
- \u30e2\u30c7\u30eb\u306e\u5b9a\u7fa9\u306f\u660e\u78ba\u304b\u3064\u8a73\u7d30\u306b\n
\n- \u30e2\u30c7\u30eb\u306e\u5b9a\u7fa9\u306f\u3001\u30c7\u30fc\u30bf\u306e\u69cb\u9020\u3092\u6b63\u78ba\u306b\u8868\u73fe\u3059\u308b\u3088\u3046\u306b\u5fc3\u304c\u3051\u307e\u3057\u3087\u3046<\/li>\n\n\n\n
- Field\u30af\u30e9\u30b9\u3092\u4f7f\u3063\u3066\u3001\u8a73\u7d30\u306a\u5236\u7d04\u3084\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u3092\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u3092\u304a\u3059\u3059\u3081\u3057\u307e\u3059<\/li>\n<\/ul>\n<\/li>\n\n\n\n
- \u30ab\u30b9\u30bf\u30e0\u30c7\u30fc\u30bf\u578b\u3092\u6d3b\u7528\u3059\u308b\n
\n- \u30c9\u30e1\u30a4\u30f3\u56fa\u6709\u306e\u5236\u7d04\u3092\u8868\u73fe\u3059\u308b\u305f\u3081\u306b\u3001\u30ab\u30b9\u30bf\u30e0\u30c7\u30fc\u30bf\u578b\u3092\u5b9a\u7fa9\u3057\u307e\u3057\u3087\u3046<\/li>\n\n\n\n
- \u30ab\u30b9\u30bf\u30e0\u30c7\u30fc\u30bf\u578b\u3092\u4f7f\u3046\u3053\u3068\u3067\u3001\u30b3\u30fc\u30c9\u306e\u610f\u56f3\u304c\u3088\u308a\u660e\u78ba\u306b\u306a\u308a\u307e\u3059<\/li>\n<\/ul>\n<\/li>\n\n\n\n
- \u7d99\u627f\u3068\u30df\u30c3\u30af\u30b9\u30a4\u30f3\u3092\u6d3b\u7528\u3059\u308b\n
\n- \u7d99\u627f\u3092\u4f7f\u3063\u3066\u3001\u30e2\u30c7\u30eb\u9593\u3067\u5171\u901a\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u518d\u5229\u7528\u3057\u307e\u3057\u3087\u3046<\/li>\n\n\n\n
- \u30df\u30c3\u30af\u30b9\u30a4\u30f3\u3092\u4f7f\u3063\u3066\u3001\u8907\u6570\u306e\u30e2\u30c7\u30eb\u3067\u5171\u901a\u306e\u6a5f\u80fd\u3092\u5171\u6709\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059<\/li>\n<\/ul>\n<\/li>\n\n\n\n
- \u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u3092\u9069\u5207\u306b\u884c\u3046\n
\n- \u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u306f\u3001\u9069\u5207\u306b\u30a8\u30e9\u30fc\u3092\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u3057\u307e\u3057\u3087\u3046<\/li>\n\n\n\n
- \u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u5206\u304b\u308a\u3084\u3059\u304f\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u3067\u3001\u30c7\u30d0\u30c3\u30b0\u304c\u5bb9\u6613\u306b\u306a\u308a\u307e\u3059<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n
\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\uff08\u578b\u30d2\u30f3\u30c8\u3001Field\u30af\u30e9\u30b9\u3001\u30ab\u30b9\u30bf\u30e0\u30c7\u30fc\u30bf\u578b\u3001\u7d99\u627f\u3068\u30df\u30c3\u30af\u30b9\u30a4\u30f3\u3001\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306e\u4f8b\uff09\uff1a<\/p>\n\n\n\n
from pydantic import BaseModel, Field, validator, ValidationError\nfrom datetime import datetime\n\nclass OddInt(int):\n @classmethod\n def __get_validators__(cls):\n yield cls.validate\n\n @classmethod\n def validate(cls, value):\n if not isinstance(value, int) or value % 2 == 0:\n raise ValueError(\"Value must be an odd integer\")\n return value\n\nclass TimestampMixin(BaseModel):\n created_at: datetime\n updated_at: datetime\n\nclass User(TimestampMixin):\n id: int\n name: str = Field(..., min_length=2, max_length=50)\n email: str\n age: OddInt\n\ntry:\n user_data = {\n \"id\": 123,\n \"name\": \"J\",\n \"email\": \"john@example.com\",\n \"age\": 30,\n \"created_at\": datetime.now(),\n \"updated_at\": datetime.now(),\n }\n user = User(**user_data)\n print(user)\nexcept ValidationError as e:\n print(e.json())<\/pre>\n\n\n\n\u3053\u306e\u30b3\u30fc\u30c9\u306f\u3001\u3053\u308c\u307e\u3067\u8aac\u660e\u3057\u3066\u304d\u305fpydantic\u306e\u6a5f\u80fd\u3092\u7d44\u307f\u5408\u308f\u305b\u305f\u4f8b\u3067\u3059\u3002\u578b\u30d2\u30f3\u30c8\u3001Field\u30af\u30e9\u30b9\u3001\u30ab\u30b9\u30bf\u30e0\u30c7\u30fc\u30bf\u578b\u3001\u7d99\u627f\u3068\u30df\u30c3\u30af\u30b9\u30a4\u30f3\u3001\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u3092\u4f7f\u3063\u3066\u3001\u5805\u7262\u3067\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u3057\u3084\u3059\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
pydantic\u306f\u3001Python\u3067\u306e\u30c7\u30fc\u30bf\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3068\u30b7\u30ea\u30a2\u30e9\u30a4\u30bc\u30fc\u30b7\u30e7\u30f3\u306b\u95a2\u3059\u308b\u591a\u304f\u306e\u554f\u984c\u3092\u89e3\u6c7a\u3057\u3066\u304f\u308c\u308b\u512a\u308c\u305f\u30e9\u30a4\u30d6\u30e9\u30ea\u3067\u3059\u3002pydantic\u306e\u6a5f\u80fd\u3092\u5341\u5206\u306b\u7406\u89e3\u3057\u3001\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u54c1\u8cea\u3068\u958b\u767a\u52b9\u7387\u3092\u5927\u5e45\u306b\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3067\u3057\u3087\u3046\u3002\u305c\u3072\u3001pydantic\u3092\u7a4d\u6975\u7684\u306b\u63a1\u7528\u3057\u3001Python\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u306e\u751f\u7523\u6027\u3068\u54c1\u8cea\u3092\u9ad8\u3081\u3066\u3044\u304d\u307e\u3057\u3087\u3046\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
pydantic\u306f\u3001Python\u3067\u306e\u30c7\u30fc\u30bf\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3068\u30b7\u30ea\u30a2\u30e9\u30a4\u30bc\u30fc\u30b7\u30e7\u30f3\u3092\u7c21\u5358\u304b\u3064\u52b9\u679c\u7684\u306b\u884c\u3046\u305f\u3081\u306e\u5f37\u529b\u306a\u30e9\u30a4\u30d6\u30e9\u30ea\u3067\u3059\u3002\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001pydantic\u306e\u57fa\u672c\u7684\u306a\u6a5f\u80fd\u3068\u4f7f\u3044\u65b9\u304b\u3089\u3001\u767a\u5c55\u7684\u306a\u6d3b\u7528\u65b9\u6cd5\u307e\u3067\u3001\u521d\u5fc3\u8005\u306b\u3082\u308f … <\/p>\n","protected":false},"author":1,"featured_media":519,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[],"class_list":{"0":"post-518","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-python"},"_links":{"self":[{"href":"https:\/\/chocottopro.com\/index.php?rest_route=\/wp\/v2\/posts\/518","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/chocottopro.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/chocottopro.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/chocottopro.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/chocottopro.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=518"}],"version-history":[{"count":1,"href":"https:\/\/chocottopro.com\/index.php?rest_route=\/wp\/v2\/posts\/518\/revisions"}],"predecessor-version":[{"id":520,"href":"https:\/\/chocottopro.com\/index.php?rest_route=\/wp\/v2\/posts\/518\/revisions\/520"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/chocottopro.com\/index.php?rest_route=\/wp\/v2\/media\/519"}],"wp:attachment":[{"href":"https:\/\/chocottopro.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=518"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/chocottopro.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=518"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/chocottopro.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=518"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}