return {"p": p.p}


@pytest.mark.parametrize(
    "path",
    ["/optional-str", "/model-optional-str"],
)
def test_optional_str_schema(path: str):
    assert app.openapi()["paths"][path]["get"]["parameters"] == snapshot(
        [
            {
                "required": False,
                "schema": {
                    "anyOf": [{"type": "string"}, {"type": "null"}],
                    "title": "P",

                            },
                        },
                        "summary": "Read Item",
                        "operationId": "read_item_items__item_id__get",
                        "parameters": [
                            {
                                "required": True,
                                "schema": {"title": "Item Id", "type": "string"},
                                "name": "item_id",

 *
 * @since 4.0.0
 */
@Experimental
public interface ArtifactFactory extends Service {

    /**
     * Creates an artifact.
     *
     * @param request the request holding artifact creation parameters
     * @return an {@code Artifact}, never {@code null}
     * @throws IllegalArgumentException if {@code request} is null or {@code request.session} is null or invalid
     */
    @Nonnull

Це налаштування змінить колірну тему підсвітки синтаксису:

<img src="/img/tutorial/extending-openapi/image04.png">

## Змініть параметри Swagger UI за замовчуванням { #change-default-swagger-ui-parameters }

FastAPI містить деякі параметри конфігурації за замовчуванням, що підходять для більшості випадків.

Вони включають такі типові налаштування:

{* ../../fastapi/openapi/docs.py ln[9:24] hl[18:24] *}

import java.io.File
import java.io.FileOutputStream
import java.util.jar.JarFile
import java.util.jar.JarOutputStream


@CacheableTransform
abstract class Minify : TransformAction<Minify.Parameters> {

    interface Parameters : TransformParameters {
        @get:Input
        var keepClassesByCoordinates: Map<String, Set<String>>
    }

    @get:PathSensitive(PathSensitivity.NAME_ONLY)
    @get:InputArtifact

def test_openapi_schema():
    response = client.get("/openapi.json")
    assert response.status_code == status.HTTP_200_OK
    actual_schema = response.json()
    assert (
        len(actual_schema["paths"]["/"]["get"]["parameters"]) == 1
    )  # primary goal of this test
    assert actual_schema == snapshot(
        {
            "components": {
                "schemas": {
                    "HTTPValidationError": {

            "paths": {
                "/{repeated_alias}": {
                    "get": {
                        "operationId": "get_parameters_with_repeated_aliases__repeated_alias__get",
                        "parameters": [
                            {
                                "in": "path",
                                "name": "repeated_alias",
                                "required": True,

# Reference

Here's the reference or code API, the classes, functions, parameters, attributes, and
all the FastAPI parts you can use in your applications.

If you want to **learn FastAPI** you are much better off reading the

# `APIRouter` class

Here's the reference information for the `APIRouter` class, with all its parameters, attributes and methods.

You can import the `APIRouter` class directly from `fastapi`:

```python
from fastapi import APIRouter
```

::: fastapi.APIRouter
    options:
        members:
            - websocket
            - include_router
            - get
            - put
            - post
            - delete

    @Resource
    protected FileAuthenticationBhv fileAuthenticationBhv;

    /**
     * Fess configuration object providing access to application settings.
     * Used for retrieving pagination and other configuration parameters.
     */
    @Resource
    protected FessConfig fessConfig;

    /**
     * Retrieves a paginated list of file configurations based on the provided pager criteria.