```

=== "Python 3.8+"

    ```Python hl_lines="12"
    {!> ../../../docs_src/separate_openapi_schemas/tutorial002.py!}
    ```

### Gleiches Schema für Eingabe- und Ausgabemodelle in der Dokumentation

Und jetzt wird es ein einziges Schema für die Eingabe und Ausgabe des Modells geben, nur `Item`, und es wird `description` als **nicht erforderlich** kennzeichnen:

    ```

=== "Python 3.8+"

    ```Python hl_lines="12"
    {!> ../../../docs_src/separate_openapi_schemas/tutorial002.py!}
    ```

### Same Schema for Input and Output Models in Docs

And now there will be one single schema for input and output for the model, only `Item`, and it will have `description` as **not required**:

<div class="screenshot">

    if PYDANTIC_V2:
        model_config = {"json_schema_serialization_defaults_required": True}


class Item(BaseModel):
    name: str
    description: Optional[str] = None
    sub: Optional[SubItem] = None
    if PYDANTIC_V2:
        model_config = {"json_schema_serialization_defaults_required": True}


def get_app_client(separate_input_output_schemas: bool = True) -> TestClient:

                                "application/json": {
                                    "schema": {
                                        "$ref": "#/components/schemas/HTTPValidationError"
                                    }
                                }
                            },
                        },
                        "500": {"description": "Server error level 0"},

                            "description": "Successful Response",
                            "content": {
                                "application/json": {
                                    "schema": {"$ref": "#/components/schemas/Item"}
                                }
                            },
                        },
                        "422": {
                            "description": "Validation Error",

                        },
                        "422": {
                            "description": "Validation Error",
                            "content": {
                                "application/json": {
                                    "schema": {
                                        "$ref": "#/components/schemas/HTTPValidationError"

                            "description": "Successful Response",
                            "content": {
                                "application/json": {
                                    "schema": {"$ref": "#/components/schemas/Model"}
                                }
                            },
                        }
                    },
                }
            },
            "/model": {

                        },
                        "422": {
                            "description": "Validation Error",
                            "content": {
                                "application/json": {
                                    "schema": {
                                        "$ref": "#/components/schemas/HTTPValidationError"

                "application/json": {
                    "schema": {
                        "$ref": "#/components/schemas/HTTPValidationError"
                    }
                }
            }
        }
    }
}
```

Les schémas sont référencés à un autre endroit du modèle OpenAPI :

```JSON hl_lines="4-16"
{
    "components": {
        "schemas": {
            "Message": {
                "title": "Message",

                                    "schema": {
                                        "$ref": "#/components/schemas/HTTPValidationError"
                                    }
                                }
                            },
                        },
                    },
                }
            }
        },
        "components": {
            "schemas": {
                "Foo": {