when you have to turn into a chrysalis--you will some day, you
know--and then after that into a butterfly, I should think you'll
feel it a little queer, won't you?'

  `Not a bit,' said the Caterpillar.

  `Well, perhaps your feelings may be different,' said Alice;
`all I know is, it would feel very queer to ME.'

  `You!' said the Caterpillar contemptuously.  `Who are YOU?'

This is because FastAPI uses this `root_path` to create the default `server` in OpenAPI with the URL provided by `root_path`.

## Additional servers

!!! warning
    This is a more advanced use case. Feel free to skip it.

By default, **FastAPI** will create a `server` in the OpenAPI schema with the URL for the `root_path`.

### What are the coding guidelines for MinIO?

For this reason it's common to provide them in environment variables that are read by the application.

## Environment Variables

!!! tip
    If you already know what "environment variables" are and how to use them, feel free to skip to the next section below.

    Otherwise, TeamCity complains "Can't find the previous revision, please commit current settings first".
  - If anything bad happens, feel free to delete the project you created and retry (you may need to apply `Synchronization disabled` before deleting it).  
    
If no errors, your new pipeline will be displayed on TeamCity web UI:

```
Gradle

!!! warning
    If you are just starting, the tutorial [SQL (Relational) Databases](../tutorial/sql-databases.md){.internal-link target=_blank} that uses SQLAlchemy should be enough.

    Feel free to skip this.

    Peewee is not recommended with FastAPI as it doesn't play well with anything async Python. There are several better alternatives.

!!! info
    These docs assume Pydantic v1.

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    Temporarily adopting this point of view (of the *external developer*) can help you feel like it's more obvious where to put the parameters, the Pydantic model for the body, for the response, etc. for that *external API*.

### Create a callback `APIRouter`

when you have to turn into a chrysalis--you will some day, you
know--and then after that into a butterfly, I should think you'll
feel it a little queer, won't you?'

  `Not a bit,' said the Caterpillar.

  `Well, perhaps your feelings may be different,' said Alice;
`all I know is, it would feel very queer to ME.'

  `You!' said the Caterpillar contemptuously.  `Who are YOU?'

  + Only use spaces for indentation.
  + Create minimal diffs - disable on save actions like reformat source code or organize imports.
    If you feel the source code should be reformatted, create a separate PR for this change.
  + Check for unnecessary whitespace with `git diff --check` before committing.