final PagingList<StopwordsItem> stopwordsList =
                    file.selectList((stopwordsPager.getCurrentPageNumber() - 1) * pageSize, pageSize);

            // update pager
            BeanUtil.copyBeanToBean(stopwordsList, stopwordsPager, option -> option.include(Constants.PAGER_CONVERSION_RULE));
            stopwordsList.setPageRangeSize(fessConfig.getPagingPageRangeSizeAsInteger());

            final int pageSize = synonymPager.getPageSize();
            final PagingList<SynonymItem> synonymList = file.selectList((synonymPager.getCurrentPageNumber() - 1) * pageSize, pageSize);

            // update pager
            BeanUtil.copyBeanToBean(synonymList, synonymPager, option -> option.include(Constants.PAGER_CONVERSION_RULE));
            synonymList.setPageRangeSize(fessConfig.getPagingPageRangeSizeAsInteger());

	configLock.RLock()
	defer configLock.RUnlock()

	if c.Frequency == 0 {
		return callhomeCycleDefault
	}

	return c.Frequency
}

// Update updates new callhome frequency
func (c *Config) Update(ncfg Config) {
	configLock.Lock()
	defer configLock.Unlock()

	c.Enable = ncfg.Enable
	c.Frequency = ncfg.Frequency
}

# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# Update the Proxy SHA in istio.deps with the first argument
# Exit immediately for non zero status
set -e
# Check unset variables
set -u
# Print commands
set -x

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`：

```Python hl_lines="34"
{!../../docs_src/body_updates/tutorial002.py!}
```

### 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)`：

```Python hl_lines="35"
{!../../docs_src/body_updates/tutorial002.py!}
```

### 更新部分数据小结

简而言之，更新部分数据应：

# If you're looking at this file in a different repo and want to make a change, please go to the
# common-files repo, make the change there and check it in. Then come back to this repo and run
# "make update-common".

# Copyright Istio Authors
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#

labels.do_you_want_to_logout=Do you want to logout?
labels.logout_button=Logout
labels.profile=Change Password
labels.administration=Administration
labels.profile_button=Profile
labels.profile.title=Profile
labels.profile.update=Update
labels.profile.back=Back
labels.profile.placeholder_old_password=Current Password
labels.profile.placeholder_new_password=New Password
labels.profile.placeholder_confirm_new_password=Confirm New Password

		} else if got.ID != u1.ID {
			t.Fatalf("select expects: %v, got %v", u1, got)
		}

		u1.Name = "jinzhu"
		if results := DB.Save(&u1); results.Error != nil {
			t.Fatalf("errors happened on update: %v", results.Error)
		} else if results.RowsAffected != 1 {
			t.Fatalf("rows affected expects: %v, got %v", 1, results.RowsAffected)
		}

		u1 = user{} // important to reinitialize this before creating it again

// necessary to perform the update for the indicated strategy.
message DaemonSetUpdateStrategy {
  // Type of daemon set update. Can be "RollingUpdate" or "OnDelete".
  // Default is OnDelete.
  // +optional
  optional string type = 1;

  // Rolling update config params. Present only if type = "RollingUpdate".
  // ---
  // TODO: Update this to follow our convention for oneOf, whatever we decide it

    fi

    if command -v chkconfig >/dev/null; then
        chkconfig --del fess 2> /dev/null || true
    fi

    if command -v update-rc.d >/dev/null; then
        update-rc.d fess remove >/dev/null || true
    fi
fi

if [ "$REMOVE_DIRS" = "true" ]; then
    if [ -d "$PID_DIR" ]; then
        echo -n "Deleting PID directory..."