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  1. docs/ja/docs/advanced/advanced-python-types.md

    例えば、`str` または `None` になり得ることを宣言できます:
    
    ```python
    from typing import Union
    
    
    def say_hi(name: Union[str, None]):
            print(f"Hi {name}!")
    ```
    
    `typing` には、`None` を取り得ることを宣言するための短縮形として `Optional` もあります。
    
    ここからは私のとても主観的な提案です:
    
    - 🚨 `Optional[SomeType]` の使用は避けましょう
    - 代わりに ✨ **`Union[SomeType, None]` を使いましょう** ✨。
    
    Created: Sun Apr 05 07:19:11 GMT 2026
    - Last Modified: Fri Feb 13 15:24:30 GMT 2026
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  2. fastapi/concurrency.py

                )
            )
            if not ok:
                raise e
        else:
            await anyio.to_thread.run_sync(
                cm.__exit__, None, None, None, limiter=exit_limiter
    Created: Sun Apr 05 07:19:11 GMT 2026
    - Last Modified: Wed Dec 17 21:25:59 GMT 2025
    - 1.5K bytes
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  3. docs_src/openapi_callbacks/tutorial001_py310.py

    from fastapi import APIRouter, FastAPI
    from pydantic import BaseModel, HttpUrl
    
    app = FastAPI()
    
    
    class Invoice(BaseModel):
        id: str
        title: str | None = None
        customer: str
        total: float
    
    
    class InvoiceEvent(BaseModel):
        description: str
        paid: bool
    
    
    class InvoiceEventReceived(BaseModel):
        ok: bool
    
    
    invoices_callback_router = APIRouter()
    
    
    @invoices_callback_router.post(
    Created: Sun Apr 05 07:19:11 GMT 2026
    - Last Modified: Wed Dec 10 08:55:32 GMT 2025
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  4. tests/test_openapi_schema_type.py

        [
            "array",
            ["string", "null"],
            None,
        ],
    )
    def test_allowed_schema_type(
        type_value: SchemaType | list[SchemaType] | None,
    ) -> None:
        """Test that Schema accepts SchemaType, List[SchemaType] and None for type field."""
        schema = Schema(type=type_value)
        assert schema.type == type_value
    
    
    def test_invalid_type_value() -> None:
    Created: Sun Apr 05 07:19:11 GMT 2026
    - Last Modified: Tue Feb 17 09:59:14 GMT 2026
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  5. fastapi/security/api_key.py

                detail="Not authenticated",
                headers={"WWW-Authenticate": "APIKey"},
            )
    
        def check_api_key(self, api_key: str | None) -> str | None:
            if not api_key:
                if self.auto_error:
                    raise self.make_not_authenticated_error()
                return None
            return api_key
    
    
    class APIKeyQuery(APIKeyBase):
        """
        API key authentication using a query parameter.
    
    Created: Sun Apr 05 07:19:11 GMT 2026
    - Last Modified: Sun Mar 15 11:44:39 GMT 2026
    - 9.6K bytes
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  6. tests/test_request_params/test_body/test_list.py

            "required": ["p"],
            "title": body_model_name,
            "type": "object",
        }
    
    
    @pytest.mark.parametrize("json", [None, {}])
    @pytest.mark.parametrize(
        "path",
        ["/required-list-str", "/model-required-list-str"],
    )
    def test_required_list_str_missing(path: str, json: dict | None):
        client = TestClient(app)
        response = client.post(path, json=json)
        assert response.status_code == 422
    Created: Sun Apr 05 07:19:11 GMT 2026
    - Last Modified: Tue Feb 17 09:59:14 GMT 2026
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  7. tests/test_param_include_in_schema.py

    app = FastAPI()
    
    
    @app.get("/hidden_cookie")
    async def hidden_cookie(
        hidden_cookie: str | None = Cookie(default=None, include_in_schema=False),
    ):
        return {"hidden_cookie": hidden_cookie}
    
    
    @app.get("/hidden_header")
    async def hidden_header(
        hidden_header: str | None = Header(default=None, include_in_schema=False),
    ):
        return {"hidden_header": hidden_header}
    
    
    Created: Sun Apr 05 07:19:11 GMT 2026
    - Last Modified: Tue Feb 17 09:59:14 GMT 2026
    - 8.6K bytes
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  8. tests/test_request_params/test_query/test_required_str.py

        assert response.json() == {
            "detail": [
                {
                    "type": "missing",
                    "loc": ["query", "p"],
                    "msg": "Field required",
                    "input": IsOneOf(None, {}),
                }
            ]
        }
    
    
    @pytest.mark.parametrize(
        "path",
        ["/required-str", "/model-required-str"],
    )
    def test_required_str(path: str):
        client = TestClient(app)
    Created: Sun Apr 05 07:19:11 GMT 2026
    - Last Modified: Sun Feb 08 10:18:38 GMT 2026
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  9. docs_src/security/tutorial004_an_py310.py

    }
    
    
    class Token(BaseModel):
        access_token: str
        token_type: str
    
    
    class TokenData(BaseModel):
        username: str | None = None
    
    
    class User(BaseModel):
        username: str
        email: str | None = None
        full_name: str | None = None
        disabled: bool | None = None
    
    
    class UserInDB(User):
        hashed_password: str
    
    
    password_hash = PasswordHash.recommended()
    
    Created: Sun Apr 05 07:19:11 GMT 2026
    - Last Modified: Thu Feb 12 18:10:35 GMT 2026
    - 4.2K bytes
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  10. docs/ja/docs/tutorial/query-params-str-validations.md

    この場合(`Annotated` を使わない場合)、関数内のデフォルト値 `None` を `Query()` に置き換える必要があるため、`Query(default=None)` のパラメータでデフォルト値を設定する必要があります。これは(少なくとも FastAPI にとっては)そのデフォルト値を定義するのと同じ目的を果たします。
    
    なので:
    
    ```Python
    q: str | None = Query(default=None)
    ```
    
    ...はデフォルト値 `None` を持つオプショナルなパラメータになり、以下と同じです:
    
    
    ```Python
    q: str | None = None
    ```
    
    ただし `Query` のバージョンでは、クエリパラメータであることを明示的に宣言しています。
    
    Created: Sun Apr 05 07:19:11 GMT 2026
    - Last Modified: Fri Mar 20 14:07:17 GMT 2026
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