---
title: "Discussion on \"Pydantic: Catch Bad Data Before It Reaches Your Database\" | Hashnode"
description: "Discussion on \"Pydantic: Catch Bad Data Before It Reaches Your Database\". A library lets members borrow books through a web form. One day, a member types -5 into the loan period field, another mistypes her email, and a third pastes an ISBN with a letter in it. The form save"
url: "https://hashnode.com/posts/pydantic-catch-bad-data-before-it-reaches-your-database/6af155c601735a92c4b00807"
---

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# [Pydantic: Catch Bad Data Before It Reaches Your Database](https://practicaldevblog.hashnode.dev/pydantic-catch-bad-data-before-it-reaches-your-database?utm_source=hashnode&utm_medium=feed)

A library lets members borrow books through a web form. One day, a member types -5 into the loan period field, another mistypes her email, and a third pastes an ISBN with a letter in it. The form save

2d ago · 7 min read · practicaldevblog.hashnode.dev  
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-   [#python](https://hashnode.com/tag/python)
-   [#pydantic](https://hashnode.com/tag/pydantic)
-   [#validation](https://hashnode.com/tag/validation)

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[Waqas Shahid](https://hashnode.com/@practicaldevblog)

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Practical tutorials, tools, and tips for developers.

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