# 响应 - 更改状态码

你可能之前已经了解到，你可以设置默认的[响应状态码](../tutorial/response-status-code.md){.internal-link target=_blank}。

但在某些情况下，你需要返回一个不同于默认值的状态码。

## 使用场景

例如，假设你想默认返回一个HTTP状态码为“OK”`200`。

但如果数据不存在，你想创建它，并返回一个HTTP状态码为“CREATED”`201`。

但你仍然希望能够使用`response_model`过滤和转换你返回的数据。

对于这些情况，你可以使用一个`Response`参数。

## 使用 `Response` 参数

你可以在你的*路径操作函数*中声明一个`Response`类型的参数（就像你可以为cookies和头部做的那样）。

然后你可以在这个*临时*响应对象中设置`status_code`。

class DfsReferralTest {

    /**
     * Test the constructor and the getData method.
     */
    @Test
    void testConstructorAndGetData() {
        // Create a mock DfsReferralData object
        DfsReferralData mockData = mock(DfsReferralData.class);

        // Create a DfsReferral instance with the mock data
        DfsReferral dfsReferral = new DfsReferral(mockData);

        // Verify that getData() returns the same mock data object

    /**
     * Creates a new DictionaryException with the specified message and cause.
     *
     * @param message the detail message
     * @param cause the underlying cause of the exception
     */
    public DictionaryException(final String message, final Throwable cause) {
        super(message, cause);
    }

    /**
     * Creates a new DictionaryException with the specified message.
     *

    assert response.json() == {
        "openapi": "3.1.0",
        "info": {"title": "FastAPI", "version": "0.1.0"},
        "paths": {
            "/products": {
                "post": {
                    "summary": "Create Product",
                    "operationId": "create_product_products_post",
                    "requestBody": {
                        "content": {
                            "application/vnd.api+json": {

    Object listener = new Object();
    ListenerCallQueue<Object> queue = new ListenerCallQueue<>();
    queue.addListener(listener, directExecutor());

    Multiset<Object> counters = ConcurrentHashMultiset.create();
    queue.enqueue(incrementingEvent(counters, listener, 1));
    queue.enqueue(incrementingEvent(counters, listener, 2));
    queue.enqueue(incrementingEvent(counters, listener, 3));

    Object listener = new Object();
    ListenerCallQueue<Object> queue = new ListenerCallQueue<>();
    queue.addListener(listener, directExecutor());

    Multiset<Object> counters = ConcurrentHashMultiset.create();
    queue.enqueue(incrementingEvent(counters, listener, 1));
    queue.enqueue(incrementingEvent(counters, listener, 2));
    queue.enqueue(incrementingEvent(counters, listener, 3));

    public static Schema newRelaxNgSchema(final URL schema) {
        assertArgumentNotNull("schema", schema);
        return newSchema(SchemaFactoryUtil.newRelaxNgSchemaFactory(), schema);
    }

    /**
     * Creates a {@link Schema} using the specified {@link SchemaFactory}.
     *
     * @param factory
     *            {@link SchemaFactory}. Must not be {@literal null}.
     * @param schema

    return new Enums();
  }

  @Override
  public Multiset<AnEnum> create(Object... elements) {
    AnEnum[] array = new AnEnum[elements.length];
    int i = 0;
    for (Object e : elements) {
      array[i++] = (AnEnum) e;
    }
    return create(array);
  }

  protected abstract Multiset<AnEnum> create(AnEnum[] elements);

  @Override
  public AnEnum[] createArray(int length) {

  }

  @CollectionFeature.Require(REJECTS_DUPLICATES_AT_CREATION)
  @CollectionSize.Require(absent = {ZERO, ONE})
  public void testCreateWithDuplicates_nonNullDuplicatesRejected() {
    E[] array = createSamplesArray();
    array[1] = e0();
    assertThrows(
        IllegalArgumentException.class, () -> collection = getSubjectGenerator().create(array));
  }

  }

  @CollectionFeature.Require(REJECTS_DUPLICATES_AT_CREATION)
  @CollectionSize.Require(absent = {ZERO, ONE})
  public void testCreateWithDuplicates_nonNullDuplicatesRejected() {
    E[] array = createSamplesArray();
    array[1] = e0();
    assertThrows(
        IllegalArgumentException.class, () -> collection = getSubjectGenerator().create(array));
  }