## Optimizar el Rendimiento del Response - Modelo de Response - Tipo de Retorno { #optimize-response-performance-response-model-return-type }

Ardından request’i doğrudan kullanıp body’yi `bytes` olarak çıkarıyoruz. Bu da FastAPI’nin request payload’ını JSON olarak parse etmeye çalışmayacağı anlamına gelir.

Sonrasında kodumuzda bu YAML içeriğini doğrudan parse ediyor, ardından YAML içeriğini doğrulamak için yine aynı Pydantic modeli kullanıyoruz:

import javax.inject.Named;
import javax.inject.Singleton;

import java.util.HashMap;
import java.util.Map;

import org.apache.maven.execution.MavenSession;
import org.apache.maven.model.Plugin;
import org.apache.maven.model.PluginManagement;
import org.apache.maven.plugin.version.DefaultPluginVersionRequest;
import org.apache.maven.plugin.version.PluginVersionRequest;

import org.apache.maven.artifact.repository.ArtifactRepository;
import org.apache.maven.artifact.repository.ArtifactRepositoryFactory;
import org.apache.maven.model.DeploymentRepository;
import org.apache.maven.model.Repository;
import org.apache.maven.plugin.LegacySupport;
import org.apache.maven.repository.RepositorySystem;
import org.codehaus.plexus.PlexusContainer;

 * under the License.
 */
package org.apache.maven.model.v4;

import javax.xml.stream.XMLStreamException;

import java.io.IOException;
import java.io.InputStream;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.List;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

import org.apache.maven.api.model.InputSource;

import org.apache.maven.api.Artifact;
import org.apache.maven.api.Dependency;
import org.apache.maven.api.MojoExecution;
import org.apache.maven.api.Node;
import org.apache.maven.api.Plugin;
import org.apache.maven.api.model.PluginExecution;
import org.apache.maven.api.plugin.descriptor.MojoDescriptor;
import org.apache.maven.api.plugin.descriptor.PluginDescriptor;
import org.apache.maven.api.plugin.descriptor.lifecycle.Lifecycle;

    errors: list[Error]


@app.get(
    "/a",
    response_class=JsonApiResponse,
    responses={500: {"description": "Error", "model": JsonApiError}},
)
async def a():
    pass  # pragma: no cover


@app.get("/b", responses={500: {"description": "Error", "model": Error}})
async def b():
    pass  # pragma: no cover


client = TestClient(app)


def test_openapi_schema():

 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.repository.internal;

import org.apache.maven.model.Repository;
import org.eclipse.aether.artifact.Artifact;
import org.eclipse.aether.artifact.DefaultArtifact;
import org.eclipse.aether.repository.RemoteRepository;
import org.eclipse.aether.repository.RepositoryPolicy;

import javax.annotation.processing.SupportedAnnotationTypes;
import javax.annotation.processing.SupportedSourceVersion;
import javax.lang.model.SourceVersion;
import javax.lang.model.element.Element;
import javax.lang.model.element.PackageElement;
import javax.lang.model.element.TypeElement;
import javax.tools.Diagnostic;
import javax.tools.FileObject;
import javax.tools.StandardLocation;

import java.io.BufferedReader;

---> 100%
```

</div>

## Создание приложения с единственной моделью { #create-the-app-with-a-single-model }

Сначала мы создадим самую простую первую версию приложения с одной моделью **SQLModel**.

Позже мы улучшим его, повысив безопасность и универсальность, добавив **несколько моделей**. 🤓

### Создание моделей { #create-models }

Импортируйте `SQLModel` и создайте модель базы данных: