# How To - Recipes

Here you will see different recipes or "how to" guides for **several topics**.

Most of these ideas would be more or less **independent**, and in most cases you should only need to study them if they apply directly to **your project**.

If something seems interesting and useful to your project, go ahead and check it, but otherwise, you might probably just skip them.

!!! tip

* <a href="https://ariadnegraphql.org/" class="external-link" target="_blank">Ariadne</a>
    * With <a href="https://ariadnegraphql.org/docs/starlette-integration" class="external-link" target="_blank">docs for Starlette</a> (that also apply to FastAPI)
* <a href="https://tartiflette.io/" class="external-link" target="_blank">Tartiflette</a>

    ```

And all the ideas in the section about [adding `dependencies` to the *path operation decorators*](dependencies-in-path-operation-decorators.md){.internal-link target=_blank} still apply, but in this case, to all of the *path operations* in the app.

## Dependencies for groups of *path operations*

    This section doesn't apply those ideas, to be equivalent to the counterpart in <a href="https://www.starlette.io/database/" class="external-link" target="_blank">Starlette</a>.

## Import and set up `SQLAlchemy`

* Import `SQLAlchemy`.

In the next chapters, I'll give you more **concrete recipes** to deploy FastAPI applications.

But for now, let's check these important **conceptual ideas**. These concepts also apply to any other type of web API. 💡

## Security - HTTPS

In the [previous chapter about HTTPS](https.md){.internal-link target=_blank} we learned about how HTTPS provides encryption for your API.

* `dependencies`: to include ✨ top-level dependencies ✨ that apply to the whole application. E.g. to add global authentication.
* `callbacks`: OpenAPI callbacks that apply to all the *path operations*.
* `deprecated`: to mark all the *path operations* as deprecated. 🤷
* `include_in_schema`: to allow excluding all the *path operations* from the OpenAPI schema.
* `responses`: OpenAPI responses that apply to all the *path operations*.

For example:

## Global Dependencies

## To `async` or not to `async`

As dependencies will also be called by **FastAPI** (the same as your *path operation functions*), the same rules apply while defining your functions.

You can use `async def` or normal `def`.

```

...it is needed only for `SQLite`.

!!! info "Technical Details"

    Exactly the same technical details as in [SQL (Relational) Databases](../tutorial/sql-databases.md#note){.internal-link target=_blank} apply.

### Make Peewee async-compatible `PeeweeConnectionState`

                """
            ),
        ] = None,
        callbacks: Annotated[
            Optional[List[BaseRoute]],
            Doc(
                """
                OpenAPI callbacks that should apply to all *path operations*.

                It will be added to the generated OpenAPI (e.g. visible at `/docs`).

                Read more about it in the