How to Pass Context to Pydantic Validators

📰 Dev.to · David Shimon

Learn how to pass context to Pydantic validators to make your functions behave differently based on the caller

intermediate Published 14 Feb 2026
Action Steps
  1. Define a Pydantic model with a validator that accepts a context parameter
  2. Use the `root_validator` decorator to pass context to the validator
  3. Create a function that calls the Pydantic model's validator with the desired context
  4. Test the function with different contexts to see how it behaves differently
Who Needs to Know This

Backend developers and software engineers can benefit from this technique to make their code more flexible and reusable. It's especially useful when working with Pydantic models and validation

Key Insight

💡 You can use the `root_validator` decorator to pass context to Pydantic validators, allowing your functions to behave differently based on the caller

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🔒 Pass context to Pydantic validators to make your functions more flexible! 💡

Key Takeaways

Learn how to pass context to Pydantic validators to make your functions behave differently based on the caller

Full Article

I had a function that needed to behave differently depending on who was calling it. Not what it does,...
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