```Python
some_variable: PlaneItem | CarItem
```

Mas se colocarmos isso na atribuição `response_model=PlaneItem | CarItem`, teríamos um erro, pois o Python tentaria executar uma **operação inválida** entre `PlaneItem` e `CarItem` em vez de interpretar isso como uma anotação de tipo.

## Lista de modelos { #list-of-models }

Da mesma forma, você pode declarar respostas de listas de objetos.

					clauseSelect.Columns = append(clauseSelect.Columns, clause.Column{Table: db.Statement.Table, Name: dbName})
				}
			}
		} else if db.Statement.Schema != nil && db.Statement.ReflectValue.IsValid() {
			queryFields := db.QueryFields
			if !queryFields {
				switch db.Statement.ReflectValue.Kind() {
				case reflect.Struct:
					queryFields = db.Statement.ReflectValue.Type() != db.Statement.Schema.ModelType

Apenas com essa declaração de tipos do Python, o **FastAPI** irá:

* Ler o corpo da requisição como um JSON.
* Converter os tipos correspondentes (se necessário).
* Validar os dados.
    * Se algum dado for inválido, irá retornar um erro bem claro, indicando exatamente onde e o que estava incorreto.
* Entregar a você a informação recebida no parâmetro `item`.

    assert response.json() == {
        "detail": [
            {
                "type": "int_parsing",
                "loc": ["body", "foo", "[key]"],
                "msg": "Input should be a valid integer, unable to parse string as an integer",
                "input": "foo",
            }
        ]
    }


def test_openapi_schema(client: TestClient):
    response = client.get("/openapi.json")

```JSON
{
  "detail": [
    {
      "type": "int_parsing",
      "loc": [
        "path",
        "item_id"
      ],
      "msg": "Input should be a valid integer, unable to parse string as an integer",
      "input": "foo"
    }
  ]
}
```

because the path parameter `item_id` had a value of `"foo"`, which is not an `int`.

        // Default fallback
        return MODEL_VERSION_4_0_0;
    }

    /**
     * Checks if a model version is valid for upgrade operations.
     * Currently supports 4.0.0, 4.1.0, and 4.2.0.
     *
     * @param modelVersion the model version to validate
     * @return true if the model version is valid
     */
    public static boolean isValidModelVersion(String modelVersion) {

///

FastAPI will now:

* **Validate** the data making sure that the max length is 50 characters
* Show a **clear error** for the client when the data is not valid
* **Document** the parameter in the OpenAPI schema *path operation* (so it will show up in the **automatic docs UI**)

## Alternative (old): `Query` as the default value { #alternative-old-query-as-the-default-value }

    assert response.json() == {
        "detail": [
            {
                "type": "int_parsing",
                "loc": ["path", "item_id"],
                "msg": "Input should be a valid integer, unable to parse string as an integer",
                "input": "foo",
            }
        ]
    }


def test_get_http_error():
    response = client.get("/items/3")

@NullUnmarked
public class ServiceTest extends TestCase {

  /** Assert on the comparison ordering of the State enum since we guarantee it. */
  public void testStateOrdering() {
    // List every valid (direct) state transition.
    assertLessThan(NEW, STARTING);
    assertLessThan(NEW, TERMINATED);

    assertLessThan(STARTING, RUNNING);
    assertLessThan(STARTING, STOPPING);
    assertLessThan(STARTING, FAILED);

	},
}

// Config represents the different configuration values for ILM subsystem
type Config struct {
	TransitionWorkers int
	ExpirationWorkers int
}

// LookupConfig - lookup ilm config and override with valid environment settings if any.
func LookupConfig(kvs config.KVS) (cfg Config, err error) {
	cfg = Config{
		TransitionWorkers: 100,
		ExpirationWorkers: 100,
	}