uuid4classUser(BaseModel):name:strlast_name:stremail:EmailStrid:UUID=Field(default_factory=uuid4)...
1.9动态默认值 fromuuidimportUUID,uuid4frompydanticimportBaseModel,FieldclassModel(BaseModel):uid:UUID=Field(default_factory=uuid4)updated:datetime=Field(default_factory=datetime.utcnow) 2.0自动排除属性 以下划线开头的类变量和带ClassVar注释的属性将自动从模型中排除 frompydanticimportBaseModelfromtypingimportCla...
该default参数用于定义字段的默认值。 from pydantic import BaseModel, Field class User(BaseModel): name: str = Field(default='John Doe') user = User() print(user) #> name='John Doe' 您还可以使用它default_factory来定义一个将被调用来生成默认值的可调用函数。 from uuid import uuid4 from pyd...
default_factory 参数仍处于beta版本,它是在v1.5中临时添加到pydantic的。它可能会在未来的版本中发生重大的变化,它的签名或者行为直到v2才会稳定。在它还处于临时阶段时,来自社区的反馈将非常有用;评论#866或者创建一个新问题。 示例用法: from datetime import datetime from uuid import UUID, uuid4 from pydantic...
您可以使用default_factory参数：
class Model(BaseModel): the_id: UUID = Field(default_factory=uuid4) print(json.loads(Model().json())) {'the_id': '4c94e7bc-78fe-48ea-8c3b-83c180437774'} 或者通过 orjson 更高效 orjson.loads(Model().json()) 原文由 alex_noname 发布,翻译遵循 CC BY-SA 4.0 许可协议 有用 ...
UUID = Field(default_factory=uuid4, frozen=True) name: str = Field(min_length=1, frozen=True) email: EmailStr = Field(pattern=r".+@example\.com$") date_of_birth: date = Field(alias="birth_date", repr=False, frozen=True) salary...
from __future__ import annotations import uuid from dataclasses import field from typing import List, Union from fastapi import FastAPI from pydantic.dataclasses import dataclass @dataclass class Item: id: uuid.UUID name: str price: float tags: List[str] = field(default_factory=list) descripti...
id: str = Field(default_factory=generate_uuid) Expand All @@ -27,12 +31,12 @@ class ModelRequestMessage(Message): class ModelResponseMessage(Message): class Config: # This is to allow having an Exception field arbitrary_types_allowed = True model_config = ConfigDict( arbitrary_types_allowe...
定义的Model如下: class Message(DamBaseModel): created_datetime: datetime = Field(default_factory=datetime.now) Run Code Online (Sandbox Code Playgroud) 插入MongoDb 的数据是: { "created_datetime" : ISODate("2022-08-22T12:02:59.546Z") } Run Code Online (Sandbox Code Playgroud) 但我目前...