<div class="termy">

```console
$ pip install sqlmodel
---> 100%
```

</div>

## Create the App with a Single Model { #create-the-app-with-a-single-model }

We'll create the simplest first version of the app with a single **SQLModel** model first.

Later we'll improve it increasing security and versatility with **multiple models** below. 🤓

### Create Models { #create-models }

        ],
        scope: Annotated[
            str,
            Form(),
            Doc(
                """
                A single string with actually several scopes separated by spaces. Each
                scope is also a string.

                For example, a single string with:

                ```python
                "items:read items:write users:read profile openid"
                ````

            'Whitelist' validation step. The parameter field will be the single one
            allowed by the alias or set of aliases defined.
            """
        ),
    ] = None,
    serialization_alias: Annotated[
        Union[str, None],
        Doc(
            """
            'Blacklist' validation step. The vanilla parameter field will be the
            single one of the alias' or set of aliases' fields and all the other

"English single typographic quotes"

    The characters «‘» and «’»
    Unicode U+2018 (LEFT SINGLE QUOTATION MARK) and Unicode U+2019 (RIGHT SINGLE QUOTATION MARK)

"code snippet"

    Also called "inline code". Text in a Markdown document which is surrounded by single backticks. A paragraph in a Markdown document can have a more than one code snippet.

### Quotes

1) Convert neutral double quotes («"») and English double typographic quotes («“» and «”») to German double typographic quotes («„» and «“»). Convert neutral single quotes («'») and English single typographic quotes («‘» and «’») to German single typographic quotes («‚» and «‘»). Do NOT convert «`"» to «„», do NOT convert «"`» to «“».

Examples:

    Source (English):

        «««
        "Hello world"

# Bigger Applications - Multiple Files { #bigger-applications-multiple-files }

If you are building an application or a web API, it's rarely the case that you can put everything in a single file.

**FastAPI** provides a convenience tool to structure your application while keeping all the flexibility.

/// info

If you come from Flask, this would be the equivalent of Flask's Blueprints.

///

## An example file structure { #an-example-file-structure }

 *
 * If output-file is provided, writes result to that file (avoids Windows file locking issues).
 * Otherwise, outputs to stdout.
 *
 * Outputs: Single line with space-separated quoted arguments (safe for batch scripts)
 */
public class JvmConfigParser {
    public static void main(String[] args) {
        if (args.length < 2 || args.length > 3) {

}

Later, when reading about how to structure bigger applications ([Bigger Applications - Multiple Files](../../tutorial/bigger-applications.md){.internal-link target=_blank}), possibly with multiple files, you will learn how to declare a single `dependencies` parameter for a group of *path operations*....

But keep in mind that, as everything is handled in memory, in a single list, it will only work while the process is running, and will only work with a single process.

---

For the next terms, use the following translations:

* «/// check»: «/// check | Verifique»
* «/// danger»: «/// danger | Cuidado»
* «/// info»: «/// info | Informação»