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

In diesen Fällen können Sie einen `Response`-Parameter verwenden.

## Einen `Response`-Parameter verwenden { #use-a-response-parameter }

Sie können einen Parameter vom Typ `Response` in Ihrer *Pfadoperation-Funktion* deklarieren (wie Sie es auch für Cookies und Header tun können).

// For slices, clear sets all elements up to the length of the slice
// to the zero value of the respective element type. If the argument
// type is a type parameter, the type parameter's type set must
// contain only map or slice types, and clear performs the operation
// implied by the type argument. If t is nil, clear is a no-op.
func clear[T ~[]Type | ~map[Type]Type1](t T)

# `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

        // Verify - should return empty when parameter name is blank
        assertFalse(result.isPresent());
    }

    // Test findBusinessLocale with null parameter name
    @Test
    public void test_findBusinessLocale_withNullParameterName() {
        // Setup mock config with null parameter name
        FessConfig mockConfig = new FessConfig.SimpleImpl() {
            @Override

        return null;
    }

    /**
     * Gets the sort prefix used for identifying sort parameters in search queries.
     *
     * @return the sortPrefix
     */
    public String getSortPrefix() {
        return sortPrefix;
    }

    /**
     * Sets the sort prefix used for identifying sort parameters in search queries.
     *
     * @param sortPrefix the sortPrefix to set
     */

      pos = value.indexOfElement("=,;", pos)
      val directive = value.substring(tokenStart, pos).trim()
      val parameter: String?

      if (pos == value.length || value[pos] == ',' || value[pos] == ';') {
        pos++ // Consume ',' or ';' (if necessary).
        parameter = null
      } else {
        pos++ // Consume '='.
        pos = value.indexOfNonWhitespace(pos)

# Параметри кукі { #cookie-parameters }

Ви можете визначати параметри кукі таким же чином, як визначаються параметри `Query` і `Path`.

## Імпорт `Cookie` { #import-cookie }

Спочатку імпортуйте `Cookie`:

{* ../../docs_src/cookie_params/tutorial001_an_py310.py hl[3] *}

## Визначення параметрів `Cookie` { #declare-cookie-parameters }

Потім визначте параметри кукі, використовуючи таку ж конструкцію як для `Path` і `Query`.