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  1. docs/zh/docs/tutorial/sql-databases.md

    您可以在[Project Generation - Template](https://fastapi.tiangolo.com/zh/project-generation/)的模板中找到一个 FastAPI 项目中的 Alembic 示例。具体在[`alembic`代码目录中](https://github.com/tiangolo/full-stack-fastapi-postgresql/tree/master/src/backend/app/alembic/)。
    
    ### 创建依赖项
    
    现在使用我们在`sql_app/database.py`文件中创建的`SessionLocal`来创建依赖项。
    
    我们需要每个请求有一个独立的数据库会话/连接(`SessionLocal`),在所有请求中使用相同的会话,然后在请求完成后关闭它。
    
    然后将为下一个请求创建一个新会话。
    
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  2. docs/em/docs/tutorial/sql-databases.md

    👆 💪 🔎 🖼 ⚗ FastAPI 🏗 📄 ⚪️➡️ [🏗 ⚡ - 📄](../project-generation.md){.internal-link target=_blank}. 🎯 <a href="https://github.com/tiangolo/full-stack-fastapi-postgresql/tree/master/src/backend/app/alembic/" class="external-link" target="_blank"> `alembic` 📁 ℹ 📟</a>.
    
    ### ✍ 🔗
    
    🔜 ⚙️ `SessionLocal` 🎓 👥 ✍ `sql_app/database.py` 📁 ✍ 🔗.
    
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  3. docs/en/docs/tutorial/dependencies/index.md

    Although the hierarchical dependency injection system is very simple to define and use, it's still very powerful.
    
    You can define dependencies that in turn can define dependencies themselves.
    
    In the end, a hierarchical tree of dependencies is built, and the **Dependency Injection** system takes care of solving all these dependencies for you (and their sub-dependencies) and providing (injecting) the results at each step.
    
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  4. docs/de/docs/advanced/openapi-callbacks.md

    ```
    
    mit einem JSON-Body, der etwa Folgendes enthält:
    
    ```JSON
    {
        "description": "Payment celebration",
        "paid": true
    }
    ```
    
    und sie würde eine Response von dieser *externen API* mit einem JSON-Body wie dem folgenden erwarten:
    
    ```JSON
    {
        "ok": true
    }
    ```
    
    !!! tip "Tipp"
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  5. docs/em/docs/advanced/openapi-callbacks.md

    ```
    https://www.external.org/events/invoices/2expen51ve
    ```
    
    ⏮️ 🎻 💪 ⚗ 🕳 💖:
    
    ```JSON
    {
        "description": "Payment celebration",
        "paid": true
    }
    ```
    
    &amp; ⚫️ 🔜 ⌛ 📨 ⚪️➡️ 👈 *🔢 🛠️* ⏮️ 🎻 💪 💖:
    
    ```JSON
    {
        "ok": true
    }
    ```
    
    !!! tip
        👀 ❔ ⏲ 📛 ⚙️ 🔌 📛 📨 🔢 🔢 `callback_url` (`https://www.external.org/events`) &amp; 🧾 `id` ⚪️➡️ 🔘 🎻 💪 (`2expen51ve`).
    
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  6. docs/zh/docs/tutorial/response-model.md

    !!! info
        你还可以使用:
    
        * `response_model_exclude_defaults=True`
        * `response_model_exclude_none=True`
    
        参考 <a href="https://docs.pydantic.dev/latest/concepts/serialization/#modeldict" class="external-link" target="_blank">Pydantic 文档</a> 中对 `exclude_defaults` 和 `exclude_none` 的描述。
    
    #### 默认值字段有实际值的数据
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  7. docs/ja/docs/tutorial/response-model.md

    !!! info "情報"
        以下も使用することができます:
    
        * `response_model_exclude_defaults=True`
        * `response_model_exclude_none=True`
    
        `exclude_defaults`と`exclude_none`については、<a href="https://docs.pydantic.dev/latest/concepts/serialization/#modeldict" class="external-link" target="_blank">Pydanticのドキュメント</a>で説明されている通りです。
    
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  8. docs/en/docs/benchmarks.md

        * FastAPI provides more features on top of Starlette. Features that you almost always need when building APIs, like data validation and serialization. And by using it, you get automatic documentation for free (the automatic documentation doesn't even add overhead to running applications, it is generated on startup).
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  9. docs/en/docs/tutorial/response-model.md

    !!! info
        You can also use:
    
        * `response_model_exclude_defaults=True`
        * `response_model_exclude_none=True`
    
        as described in <a href="https://docs.pydantic.dev/latest/concepts/serialization/#modeldict" class="external-link" target="_blank">the Pydantic docs</a> for `exclude_defaults` and `exclude_none`.
    
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  10. docs/zh/docs/tutorial/body-updates.md

        **FastAPI** 对此没有任何限制,可以**随意**互换使用这两种操作。
    
        但本指南也会分别介绍这两种操作各自的用途。
    
    ### 使用 Pydantic 的 `exclude_unset` 参数
    
    更新部分数据时,可以在 Pydantic 模型的 `.dict()` 中使用 `exclude_unset` 参数。
    
    比如,`item.dict(exclude_unset=True)`。
    
    这段代码生成的 `dict` 只包含创建 `item` 模型时显式设置的数据,而不包括默认值。
    
    然后再用它生成一个只含已设置(在请求中所发送)数据,且省略了默认值的 `dict`:
    
    ```Python hl_lines="34"
    {!../../../docs_src/body_updates/tutorial002.py!}
    ```
    
    ### 使用 Pydantic 的 `update` 参数
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