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/*
 * Copyright 2019 the original author or authors.
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 * Licensed under the Apache License, Version 2.0 (the "License");
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/*
 * Copyright 2022 the original author or authors.
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 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
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 * Unless required by applicable law or agreed to in writing, software
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/*
 * Copyright 2024 the original author or authors.
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/*
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/*
 * Copyright 2022 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
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 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,

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`）；
* 提取存储的数据；

/// info | Информация

В Pydantic v1 метод назывался `.copy()`, в Pydantic v2 он помечен как устаревший (но все еще поддерживается) и переименован в `.model_copy()`.

Примеры здесь используют `.copy()` для совместимости с Pydantic v1, но если вы можете использовать Pydantic v2, лучше используйте `.model_copy()`.

///

/*
 * Copyright (C) 2008 The Guava Authors
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 *
 * Unless required by applicable law or agreed to in writing, software
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/*
 * Copyright (C) 2011 The Guava Authors
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 * 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
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 * Unless required by applicable law or agreed to in writing, software
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