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  1. docs_src/query_params_str_validations/tutorial007_an_py310.py

    from typing import Annotated
    
    from fastapi import FastAPI, Query
    
    app = FastAPI()
    
    
    @app.get("/items/")
    async def read_items(
        q: Annotated[str | None, Query(title="Query string", min_length=3)] = None,
    ):
        results = {"items": [{"item_id": "Foo"}, {"item_id": "Bar"}]}
        if q:
            results.update({"q": q})
    Created: Sun Apr 05 07:19:11 GMT 2026
    - Last Modified: Tue Mar 26 16:56:53 GMT 2024
    - 337 bytes
    - Click Count (0)
  2. docs_src/encoder/tutorial001_py310.py

    from fastapi import FastAPI
    from fastapi.encoders import jsonable_encoder
    from pydantic import BaseModel
    
    fake_db = {}
    
    
    class Item(BaseModel):
        title: str
        timestamp: datetime
        description: str | None = None
    
    
    app = FastAPI()
    
    
    @app.put("/items/{id}")
    def update_item(id: str, item: Item):
        json_compatible_item_data = jsonable_encoder(item)
    Created: Sun Apr 05 07:19:11 GMT 2026
    - Last Modified: Fri Jan 07 14:11:31 GMT 2022
    - 430 bytes
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  3. fastapi/exception_handlers.py

    from starlette.responses import JSONResponse, Response
    from starlette.status import WS_1008_POLICY_VIOLATION
    
    
    async def http_exception_handler(request: Request, exc: HTTPException) -> Response:
        headers = getattr(exc, "headers", None)
        if not is_body_allowed_for_status_code(exc.status_code):
            return Response(status_code=exc.status_code, headers=headers)
        return JSONResponse(
    Created: Sun Apr 05 07:19:11 GMT 2026
    - Last Modified: Tue Sep 16 17:21:48 GMT 2025
    - 1.2K bytes
    - Click Count (0)
  4. docs_src/dependencies/tutorial014_an_py310.py

    from sqlmodel import Field, Session, SQLModel, create_engine
    
    engine = create_engine("postgresql+psycopg://postgres:postgres@localhost/db")
    
    
    class User(SQLModel, table=True):
        id: int | None = Field(default=None, primary_key=True)
        name: str
    
    
    app = FastAPI()
    
    
    def get_session():
        with Session(engine) as session:
            yield session
    
    
    Created: Sun Apr 05 07:19:11 GMT 2026
    - Last Modified: Mon Sep 29 03:29:38 GMT 2025
    - 957 bytes
    - Click Count (0)
  5. okhttp/src/commonJvmAndroid/kotlin/okhttp3/ConnectionPool.kt

        maxIdleConnections: Int = 5,
        keepAliveDuration: Long = 5,
        timeUnit: TimeUnit = TimeUnit.MINUTES,
        taskRunner: TaskRunner = TaskRunner.INSTANCE,
        connectionListener: ConnectionListener = ConnectionListener.NONE,
      ) : this(
        RealConnectionPool(
          taskRunner = taskRunner,
          maxIdleConnections = maxIdleConnections,
          keepAliveDuration = keepAliveDuration,
          timeUnit = timeUnit,
    Created: Fri Apr 03 11:42:14 GMT 2026
    - Last Modified: Tue Oct 07 21:55:03 GMT 2025
    - 3.4K bytes
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  6. docs/zh/docs/tutorial/body.md

    * 如果该参数也在**路径**中声明了,它就是路径参数。
    * 如果该参数是(`int`、`float`、`str`、`bool` 等)**单一类型**,它会被当作**查询**参数。
    * 如果该参数的类型声明为 **Pydantic 模型**,它会被当作请求**体**。
    
    /// note | 注意
    
    FastAPI 会根据默认值 `= None` 知道 `q` 的值不是必填的。
    
    `str | None` 并不是 FastAPI 用来判断是否必填的依据;是否必填由是否有默认值 `= None` 决定。
    
    但添加这些类型注解可以让你的编辑器提供更好的支持并检测错误。
    
    ///
    
    ## 不使用 Pydantic { #without-pydantic }
    
    Created: Sun Apr 05 07:19:11 GMT 2026
    - Last Modified: Fri Mar 20 17:06:37 GMT 2026
    - 5.9K bytes
    - Click Count (0)
  7. tests/test_request_params/test_header/test_required_str.py

            "detail": [
                {
                    "type": "missing",
                    "loc": ["header", "p_alias"],
                    "msg": "Field required",
                    "input": IsOneOf(None, IsPartialDict({"p": "hello"})),
                }
            ]
        }
    
    
    @pytest.mark.parametrize(
        "path",
        [
            "/required-alias",
            "/model-required-alias",
        ],
    )
    Created: Sun Apr 05 07:19:11 GMT 2026
    - Last Modified: Sun Feb 08 10:18:38 GMT 2026
    - 10.3K bytes
    - Click Count (0)
  8. docs_src/query_params_str_validations/tutorial008_an_py310.py

    app = FastAPI()
    
    
    @app.get("/items/")
    async def read_items(
        q: Annotated[
            str | None,
            Query(
                title="Query string",
                description="Query string for the items to search in the database that have a good match",
                min_length=3,
            ),
        ] = None,
    ):
        results = {"items": [{"item_id": "Foo"}, {"item_id": "Bar"}]}
        if q:
            results.update({"q": q})
    Created: Sun Apr 05 07:19:11 GMT 2026
    - Last Modified: Tue Oct 24 20:26:06 GMT 2023
    - 498 bytes
    - Click Count (0)
  9. docs/de/docs/how-to/separate-openapi-schemas.md

    </div>
    
    Das bedeutet, dass es **immer einen Wert** hat, der Wert kann jedoch manchmal `None` sein (oder `null` in JSON).
    
    Das bedeutet, dass Clients, die Ihre API verwenden, nicht prüfen müssen, ob der Wert vorhanden ist oder nicht. Sie können davon ausgehen, dass das Feld immer vorhanden ist. In einigen Fällen hat es jedoch nur den Defaultwert `None`.
    
    Created: Sun Apr 05 07:19:11 GMT 2026
    - Last Modified: Wed Dec 24 10:28:19 GMT 2025
    - 5.2K bytes
    - Click Count (0)
  10. docs/ru/docs/how-to/separate-openapi-schemas.md

    </div>
    
    Это означает, что у него **всегда будет какое‑то значение**, просто иногда это значение может быть `None` (или `null` в JSON).
    
    Это означает, что клиентам, использующим ваш API, не нужно проверять, существует ли это значение или нет: они могут **исходить из того, что поле всегда присутствует**, но в некоторых случаях оно будет иметь значение по умолчанию `None`.
    
    Created: Sun Apr 05 07:19:11 GMT 2026
    - Last Modified: Tue Jan 20 23:03:07 GMT 2026
    - 6.9K bytes
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