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  1. docs_src/query_params_str_validations/tutorial001_py310.py

    from fastapi import FastAPI
    
    app = FastAPI()
    
    
    @app.get("/items/")
    async def read_items(q: str | None = 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: Fri Jan 07 14:11:31 GMT 2022
    - 239 bytes
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  2. docs/fr/docs/how-to/separate-openapi-schemas.md

    </div>
    
    Cela signifie qu'il aura **toujours une valeur**, simplement, parfois la valeur pourra être `None` (ou `null` en JSON).
    
    Cela signifie que les clients utilisant votre API n'ont pas à vérifier si la valeur existe ou non, ils peuvent **supposer que le champ sera toujours présent**, mais que, dans certains cas, il aura la valeur par défaut `None`.
    
    Created: Sun Apr 05 07:19:11 GMT 2026
    - Last Modified: Sat Feb 14 08:12:41 GMT 2026
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  3. docs/pt/docs/tutorial/body-multiple-params.md

    E você também pode declarar parâmetros de corpo como opcionais, definindo o valor padrão com `None`:
    
    {* ../../docs_src/body_multiple_params/tutorial001_an_py310.py hl[18:20] *}
    
    /// note | Nota
    
    Repare que, neste caso, o `item` que seria capturado a partir do corpo é opcional. Visto que ele possui `None` como valor padrão.
    
    ///
    
    ## Múltiplos parâmetros de corpo { #multiple-body-parameters }
    
    Created: Sun Apr 05 07:19:11 GMT 2026
    - Last Modified: Fri Feb 13 13:48:53 GMT 2026
    - 5.3K bytes
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  4. docs_src/query_params_str_validations/tutorial014_py310.py

    from fastapi import FastAPI, Query
    
    app = FastAPI()
    
    
    @app.get("/items/")
    async def read_items(
        hidden_query: str | None = Query(default=None, include_in_schema=False),
    ):
        if hidden_query:
            return {"hidden_query": hidden_query}
        else:
    Created: Sun Apr 05 07:19:11 GMT 2026
    - Last Modified: Tue Mar 26 16:56:53 GMT 2024
    - 298 bytes
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  5. tests/test_stringified_annotation_dependency.py

    
    class DummyClient:
        async def get_people(self) -> list:
            return ["John Doe", "Jane Doe"]
    
        async def close(self) -> None:
            pass
    
    
    async def get_client() -> AsyncGenerator[DummyClient, None]:
        client = DummyClient()
        yield client
        await client.close()
    
    
    Client = Annotated[DummyClient, Depends(get_client)]
    
    
    @pytest.fixture(name="client")
    Created: Sun Apr 05 07:19:11 GMT 2026
    - Last Modified: Wed Dec 17 21:25:59 GMT 2025
    - 2.2K bytes
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  6. docs_src/query_params_str_validations/tutorial014_an_py310.py

    from typing import Annotated
    
    from fastapi import FastAPI, Query
    
    app = FastAPI()
    
    
    @app.get("/items/")
    async def read_items(
        hidden_query: Annotated[str | None, Query(include_in_schema=False)] = None,
    ):
        if hidden_query:
            return {"hidden_query": hidden_query}
        else:
    Created: Sun Apr 05 07:19:11 GMT 2026
    - Last Modified: Tue Mar 26 16:56:53 GMT 2024
    - 331 bytes
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  7. docs_src/query_params_str_validations/tutorial009_py310.py

    from fastapi import FastAPI, Query
    
    app = FastAPI()
    
    
    @app.get("/items/")
    async def read_items(q: str | None = Query(default=None, alias="item-query")):
        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: Fri May 13 23:38:22 GMT 2022
    - 281 bytes
    - Click Count (0)
  8. docs/zh-hant/docs/how-to/separate-openapi-schemas.md

    <img src="/img/tutorial/separate-openapi-schemas/image02.png">
    </div>
    
    這代表該欄位一定會有值,只是有時候值可能是 `None`(在 JSON 中為 `null`)。
    
    因此,使用你 API 的用戶端不必檢查值是否存在,可以假設該欄位一定存在;只是有些情況下它的值會是預設的 `None`。
    
    在 OpenAPI 中,描述這種情況的方式是將該欄位標記為必填,因為它一定存在。
    
    因此,同一個模型的 JSON Schema 會依用於輸入或輸出而不同:
    
    - 用於輸入時,`description` 不是必填
    - 用於輸出時,`description` 是必填(且可能為 `None`,在 JSON 中為 `null`)
    
    ### 文件中的輸出模型 { #model-for-output-in-docs }
    
    Created: Sun Apr 05 07:19:11 GMT 2026
    - Last Modified: Sat Feb 14 08:15:26 GMT 2026
    - 4.1K bytes
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  9. docs/zh/docs/how-to/separate-openapi-schemas.md

    <img src="/img/tutorial/separate-openapi-schemas/image02.png">
    </div>
    
    这意味着它**总会有值**,只是有时该值可能为 `None`(在 JSON 中是 `null`)。
    
    这也意味着,使用你的 API 的客户端无需检查该值是否存在,他们可以**假设该字段总会存在**,只是有时它会是默认值 `None`。
    
    在 OpenAPI 中描述这一点的方式,是把该字段标记为**必填**,因为它总会存在。
    
    因此,一个模型的 JSON Schema 会根据它用于**输入还是输出**而有所不同:
    
    - 用于**输入**时,`description` **不是必填**
    - 用于**输出**时,它是**必填**(并且可能为 `None`,在 JSON 中为 `null`)
    
    ### 文档中的输出模型 { #model-for-output-in-docs }
    
    Created: Sun Apr 05 07:19:11 GMT 2026
    - Last Modified: Fri Feb 13 13:37:57 GMT 2026
    - 4.3K bytes
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  10. docs_src/query_params_str_validations/tutorial004_py310.py

    from fastapi import FastAPI, Query
    
    app = FastAPI()
    
    
    @app.get("/items/")
    async def read_items(
        q: str | None = Query(
            default=None, min_length=3, max_length=50, pattern="^fixedquery$"
        ),
    ):
        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
    - 335 bytes
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