```JSON
{
    "name": "Foo",
    "price": 45.2
}
```

## Déclarez-le comme paramètre

Pour l'ajouter à votre *opération de chemin*, déclarez-le comme vous déclareriez des paramètres de chemin ou de requête :

```Python hl_lines="18"
{!../../../docs_src/body/tutorial001.py!}
```

...et déclarez que son type est le modèle que vous avez créé : `Item`.

## Résultats

## Multiples paramètres de chemin et de requête

Vous pouvez déclarer plusieurs paramètres de chemin et paramètres de requête dans la même fonction, **FastAPI** saura comment les gérer.

Et vous n'avez pas besoin de les déclarer dans un ordre spécifique.

Ils seront détectés par leurs noms :

```Python hl_lines="8  10"

        exception.message.contains("The service '${BuildTreeScopedService.name}' declares service scope 'BuildTree' but is registered in the 'Build' scope. Either update the '@ServiceScope()' annotation on '${BuildTreeScopedService.simpleName}' to include the 'Build' scope or move the service registration to one of the declared scopes.")

        where:
        method     | registration

```JSON
{
    "name": "Foo",
    "price": 45.2
}
```

## Declare it as a parameter

To add it to your *path operation*, declare it the same way you declared path and query parameters:

=== "Python 3.10+"

    ```Python hl_lines="16"
    {!> ../../../docs_src/body/tutorial001_py310.py!}
    ```

=== "Python 3.8+"

    {!> ../../../docs_src/dependencies/tutorial005.py!}
    ```

Let's focus on the parameters declared:

* Even though this function is a dependency ("dependable") itself, it also declares another dependency (it "depends" on something else).
    * It depends on the `query_extractor`, and assigns the value returned by it to the parameter `q`.
* It also declares an optional `last_query` cookie, as a `str`.

----
Maven publication 'maven' contains dependencies that cannot be represented in a published pom file.
  - Declares capability com.acme:my-library:1.0
  - Declares capability com.other:module:1.1

        return String.format(
            "The service '%s' declares %s but is registered in the '%s' scope. " +
                "Either update the '@ServiceScope()' annotation on '%s' to include the '%s' scope " +
                "or move the service registration to one of the declared scopes.",
            serviceType.getName(),
            displayScopes(actualScopes),

/**
 * A component which can declare additional variants corresponding to
 * features. When published to Maven POMs, the dependencies of those variants
 * are exposed as optional dependencies. When published to Gradle metadata, the
 * variants are published as is.
 *
 * @since 5.3
 */
public interface AdhocComponentWithVariants extends SoftwareComponent {

    /**

The `api` configuration should be used to declare constraints and dependencies which should be used when compiling against the platform, whereas the `runtime` configuration should be used to declare constraints or dependencies which are visible at runtime.

.Declaring API and runtime constraints
====

    /**
     * Declares a new attribute in the schema and configures it with the default strategy.
     * If the attribute was already declared it will simply return the existing strategy.
     *
     * @param attribute the attribute to declare in the schema
     * @param <T> the concrete type of the attribute
     *