### Usando o parâmetro `exclude_unset` do Pydantic

Se você quiser receber atualizações parciais, é muito útil usar o parâmetro `exclude_unset` no método `.model_dump()` do modelo do Pydantic.

Como `item.model_dump(exclude_unset=True)`.

/// info | Informação

No Pydantic v1, o método que era chamado `.dict()` e foi depreciado (mas ainda suportado) no Pydantic v2. Agora, deve-se usar o método `.model_dump()`.

```Python
item: Item = Body(embed=True)
```

так же, как в этом примере:

{* ../../docs_src/body_multiple_params/tutorial005_an_py310.py hl[17] *}

В этом случае **FastAPI** будет ожидать тело запроса в формате:

```JSON hl_lines="2"
{

            final Kryo kryo = new Kryo();
            // TODO use kryo.register
            kryo.setRegistrationRequired(false);
            if (logger.isDebugEnabled()) {
                kryo.setWarnUnregisteredClasses(true);
            }
            return kryo;
        });
    }

    /**
     * Gets the configured serializer type from the Fess configuration.
     *
     * @return the serializer type (either "kryo" or "javabin")

            builder.queryTime(searchResponse.getTook().millis());

            if (searchResponse.getTotalShards() != searchResponse.getSuccessfulShards()) {
                builder.partialResults(true);
            }

            // build highlighting fields
            final String hlPrefix = ComponentUtil.getQueryHelper().getHighlightPrefix();
            for (final SearchHit searchHit : searchHits.getHits()) {

    </description>
    <name>html</name>
    <function-class>org.codelibs.fess.taglib.FessFunctions</function-class>
    <function-signature>java.lang.String html(boolean)</function-signature>
    <example>
      ${fe:html(true)}...${fe:html(false)}
    </example>
  </function>

  <function>
    <description>
      Returns a label name.
    </description>
    <name>labelexists</name>

  static final class FieldSetter<T> {
    private final Field field;

    private FieldSetter(Field field) {
      this.field = field;
      field.setAccessible(true);
    }

    void set(T instance, Object value) {
      try {
        field.set(instance, value);
      } catch (IllegalAccessException impossible) {
        throw new AssertionError(impossible);
      }

            sb.append(':');
            sb.append(scope);
        }
        return sb.toString();
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }
        DefaultArtifact that = (DefaultArtifact) o;
        return Objects.equals(groupId, that.groupId)

					// same nested structure
					if _, ok := joinedNestedSchemaMap[fullRelsName]; !ok {
						if value := reflect.ValueOf(values[idx]).Elem(); value.Kind() == reflect.Ptr && value.IsNil() {
							isNilPtrValue = true
							break
						}

						relValue.Set(reflect.New(relValue.Type().Elem()))
						joinedNestedSchemaMap[fullRelsName] = nil
					}
				}
				currentReflectValue = relValue
			}

    @BeforeClass
    public static void beforeClass() throws Exception {
        runner = new OpenSearchRunner();
        runner.onBuild((number, settingsBuilder) -> {
            settingsBuilder.put("http.cors.enabled", true);
            settingsBuilder.put("discovery.type", "single-node");
        })
                .build(newConfigs().clusterName("AnalyzerConverterTest")
                        .numOfNode(1)

  @DoNotCall("Always throws UnsupportedOperationException")
  public final boolean remove(@Nullable Object key, @Nullable Object value) {
    throw new UnsupportedOperationException();
  }

  /**
   * Returns {@code true} if this immutable multimap's implementation contains references to
   * user-created objects that aren't accessible via this multimap's methods. This is generally used