![ReDoc](https://fastapi.tiangolo.com/img/index/index-02-redoc-simple.png)

### OpenAPI

**FastAPI** generates a "schema" with all your API using the **OpenAPI** standard for defining APIs.

#### "Schema"

A "schema" is a definition or description of something. Not the code that implements it, but just an abstract description.

* Add a **JSON Schema** for the response, in the OpenAPI *path operation*.
    * This will be used by the **automatic docs**.
    * It will also be used by automatic client code generation tools.

But most importantly:

* It will **limit and filter** the output data to what is defined in the return type.
    * This is particularly important for **security**, we'll see more of that below.

                It will be included in the generated OpenAPI (e.g. visible at `/docs`).
                """
            ),
        ] = None,
        description: Annotated[
            Optional[str],
            Doc(
                """
                Security scheme description.

                It will be included in the generated OpenAPI (e.g. visible at `/docs`).
                """

                It will be included in the generated OpenAPI (e.g. visible at `/docs`).
                """
            ),
        ] = None,
        description: Annotated[
            Optional[str],
            Doc(
                """
                Security scheme description.

                It will be included in the generated OpenAPI (e.g. visible at `/docs`).
                """

            "description": "Production environment"
        }
    ],
    "paths": {
            // More stuff here
    }
}
```

!!! tip
    Notice the auto-generated server with a `url` value of `/api/v1`, taken from the `root_path`.

In the docs UI at <a href="http://127.0.0.1:9999/api/v1/docs" class="external-link" target="_blank">http://127.0.0.1:9999/api/v1/docs</a> it would look like:

而且您还可以将 Alembic 用于“迁移”（这是它的主要工作）。

“迁移”是每当您更改 SQLAlchemy 模型的结构、添加新属性等以在数据库中复制这些更改、添加新列、新表等时所需的一组步骤。

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

* <a href="https://github.com/tiangolo/full-stack-flask-couchdb" class="external-link" target="_blank">https://github.com/tiangolo/full-stack-flask-couchdb</a>

&amp; 👫 🎏 🌕-📚 🚂 🧢 [**FastAPI** 🏗 🚂](project-generation.md){.internal-link target=_blank}.

!!! info
    🏺-Apispec ✍ 🎏 🍭 👩‍💻.

!!! check "😮 **FastAPI** "
    🏗 🗄 🔗 🔁, ⚪️➡️ 🎏 📟 👈 🔬 🛠️ &amp; 🔬.

It's possible to create a `list` of its items with `list(some_user.items)`.

But the object itself is not a `list`. And it's also not an actual Python <a href="https://docs.python.org/3/glossary.html#term-generator" class="external-link" target="_blank">generator</a>. Because of this, Pydantic doesn't know by default how to convert it to a `list` of Pydantic *models* / schemas.

* Titiz bir çalışmanın sonucunda yukarıdaki standartlara uygun bir framework oluşturduk. Standartları pastanın üzerine sonradan eklenmiş bir çilek olarak görmedik.
* Ayrıca bu bir çok dilde kullanılabilecek **client code generator** kullanımına da izin veriyor.

### Otomatik dokümantasyon

    if inspect.isgeneratorfunction(call):
        return True
    dunder_call = getattr(call, "__call__", None)  # noqa: B004
    return inspect.isgeneratorfunction(dunder_call)


async def solve_generator(
    *, call: Callable[..., Any], stack: AsyncExitStack, sub_values: Dict[str, Any]
) -> Any:
    if is_gen_callable(call):
        cm = contextmanager_in_threadpool(contextmanager(call)(**sub_values))