これを使うことで、デフォルト値を省略して、設定された（リクエストで送られた）データのみを含む`dict`を生成することができます:

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

### Pydanticの`update`パラメータ

ここで、`.copy()`を用いて既存のモデルのコピーを作成し、`update`パラメータに更新するデータを含む`dict`を渡すことができます。

`stored_item_model.copy(update=update_data)`のように:

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

### 部分的更新のまとめ

まとめると、部分的な更新を適用するには、次のようにします:

* (オプションで)`PUT`の代わりに`PATCH`を使用します。

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/*
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/*
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/*
 * Copyright 2012-2025 CodeLibs Project and the Others.
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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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