## パラメータを非推奨にする { #deprecating-parameters }

さて、このパラメータが気に入らなくなったとしましょう。

それを使っているクライアントがいるので、しばらくは残しておく必要がありますが、ドキュメントには<dfn title="廃止予定、使用は推奨されません">廃止予定</dfn>と明記しておきたいです。

その場合、`Query`にパラメータ`deprecated=True`を渡します:

{* ../../docs_src/query_params_str_validations/tutorial010_an_py310.py hl[19] *}

ドキュメントは以下のようになります:

<img src="/img/tutorial/query-params-str-validations/image01.png">

```JSON
{
    "name": "Foo",
    "price": 50.2
}
```

/// info | Informação

Você também pode usar:

* `response_model_exclude_defaults=True`
* `response_model_exclude_none=True`

conforme descrito na [documentação do Pydantic](https://docs.pydantic.dev/1.10/usage/exporting_models/#modeldict) para `exclude_defaults` e `exclude_none`.

///

        @Override
        public Object key(Exclusion exclusion) {
            return getExclusionKey(exclusion);
        }
    }

    /**
     * Return the second value if <code>sourceDominant</code> is true, the first one otherwise.
     * @param <T>
     */
    private static class SourceDominant<T> implements Remapping<T> {
        private final boolean sourceDominant;

     */
    @Nonnull
    DependencyScope getScope();

    /**
     * Returns whether the dependency is optional, mandatory, or of unspecified obligation.
     *
     * @return {@code Boolean.TRUE} and {@code Boolean.FALSE} if optional, or {@code null} if unspecified
     */
    @Nullable
    Boolean getOptional();

    /**
     * {@return transitive dependencies to exclude}
     */
    @Nonnull

	}

	levelB1 := &LevelB1{Value: "foo"}
	if err := DB.Create(levelB1).Error; err != nil {
		t.Error(err)
	}

	levelB3 := &LevelB3{
		Value:     "bar",
		LevelB1ID: sql.NullInt64{Valid: true, Int64: int64(levelB1.ID)},
		LevelB2s:  []*LevelB2{},
	}
	if err := DB.Create(levelB3).Error; err != nil {
		t.Error(err)
	}
	levelB1.LevelB3s = []*LevelB3{levelB3}

	want := []*LevelB1{levelB1}

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

    hpackWriter!!.resizeHeaderTable(1048576)
    assertThat(hpackWriter!!.maxDynamicTableByteCount).isEqualTo(16384)
  }

  @Test
  fun huffmanEncode() {
    hpackWriter = Hpack.Writer(4096, true, bytesOut)
    hpackWriter!!.writeHeaders(headerEntries("foo", "bar"))
    val expected =
      Buffer()
        .writeByte(0x40) // Literal header, new name.

    ListenableFuture<?> statusFuture = closingFuture.statusFuture();
    waiter.awaitStarted();
    assertThat(statusFuture.isDone()).isFalse();
    statusFuture.cancel(true);
    assertThat(statusFuture.isCancelled()).isTrue();
    waiter.awaitReturned();
    assertThat(getFinalValue(closingFuture)).isEqualTo("value");
  }

  public void testCancel_caught() throws Exception {

    assertThat(graph.requestedNodes).containsExactly('a', 'a', 'b', 'b', 'd', 'd', 'd', 'g');
  }

  private static SuccessorsFunction<Character> createDirectedGraph(String... edges) {
    return createGraph(/* directed= */ true, edges);
  }

  private static SuccessorsFunction<Character> createUndirectedGraph(String... edges) {
    return createGraph(/* directed= */ false, edges);
  }

  /**

    * In order to safely upgrade an existing Kubernetes cluster without interruption of volume attach/detach logic:
        * First upgrade the master to Kubernetes v1.3.