log.trace("update: " + this.updates + " " + offset + ":" + len);
            log.trace(Hexdump.toHexString(input, offset, Math.min(len, 256)));
        }
        if (len == 0) {
            return; /* CRITICAL */
        }
        this.digest.update(input, offset, len);
        this.updates++;
    }

    /**
     * Finalize and return the calculated message digest
     *
     * @return calculated digest

		gorm.Model
		Name                    string
		FieldAllowCreate        string `gorm:"<-:create"`
		FieldAllowUpdate        string `gorm:"<-:update"`
		FieldAllowSave          string `gorm:"<-"`
		FieldAllowSave2         string `gorm:"<-:create,update"`
		FieldAllowSave3         string `gorm:"->:false;<-:create"`
		FieldReadonly           string `gorm:"->"`
		FieldIgnore             string `gorm:"-"`

            Hexdump.hexdump(log, input, offset, Math.min(len, 256));
            log.flush();
        }
        if (len == 0) {
            return; /* CRITICAL */
        }
        digest.update(input, offset, len);
        updates++;
    }

    /**
     * Computes and returns the message digest.
     *
     * @return the computed digest bytes
     */

    private final String output;

    /**
     * Array of new input character sequences for update operations.
     * When not null, indicates this item has pending updates.
     */
    private String[] newInputs;

    /**
     * The new output character sequence for update operations.
     * When not null, indicates this item has pending updates.
     */
    private String newOutput;

    /**

{* ../../docs_src/body_updates/tutorial002_py310.py hl[32] *}

### Використання параметра `update` у Pydantic

Тепер Ви можете створити копію наявної моделі за допомогою `.model_copy()`, і передати параметр `update` з `dict` , який містить дані для оновлення.

/// info | Інформація

      return (Listener) listenersUpdater.getAndSet(future, update);
    }

    @Override
    @Nullable Waiter gasWaiters(AbstractFutureState<?> future, Waiter update) {
      return (Waiter) waitersUpdater.getAndSet(future, update);
    }

    @Override
    boolean casValue(AbstractFutureState<?> future, @Nullable Object expect, Object update) {
      return valueUpdater.compareAndSet(future, expect, update);

      return listenersUpdater.getAndSet(future, update);
    }

    @Override
    @Nullable Waiter gasWaiters(AbstractFutureState<?> future, Waiter update) {
      return waitersUpdater.getAndSet(future, update);
    }

    @Override
    boolean casValue(AbstractFutureState<?> future, @Nullable Object expect, Object update) {
      return valueUpdater.compareAndSet(future, expect, update);
    }

Note, since it is still `pip` and `pip-compile` tools used under the hood, so
most of the command line arguments and features supported by those tools will be
acknowledged by the Bazel requirements updater command as well. For example, if
you wish the updater to consider pre-release versions simply pass `--pre`
argument to the bazel command:

```

     */
    void store(RESULT accessResult);

    /**
     * Updates the given access result.
     *
     * @param accessResult the access result to update
     */
    void update(RESULT accessResult);

    /**
     * Updates the given list of access results.
     *
     * @param accessResult the list of access results to update
     */
    void update(List<RESULT> accessResult);

    /**

这段代码生成的 `dict` 只包含创建 `item` 模型时显式设置的数据，而不包括默认值。

然后再用它生成一个只含已设置（在请求中所发送）数据，且省略了默认值的 `dict`：

{* ../../docs_src/body_updates/tutorial002.py hl[34] *}

### 使用 Pydantic 的 `update` 参数

接下来，用 `.copy()` 为已有模型创建调用 `update` 参数的副本，该参数为包含更新数据的 `dict`。

例如，`stored_item_model.copy(update=update_data)`：

{* ../../docs_src/body_updates/tutorial002.py hl[35] *}

### 更新部分数据小结

简而言之，更新部分数据应：

* 使用 `PATCH` 而不是 `PUT` （可选，也可以用 `PUT`）；