Error8 reports
Fix ValidationError
in Pydantic
✅ Solution
ValidationError in pydantic usually arises when the input data doesn't conform to the schema defined in your pydantic model, such as incorrect data types or missing required fields. Resolve it by carefully checking the types, formats, and presence of your input data against the model's field definitions, and handle potential type coercion or provide default values where appropriate. Use `try...except ValidationError` blocks to catch and gracefully handle validation issues within your code.
Related Issues
Real GitHub issues where developers encountered this error:
Allow raising custom model validation exceptionsNov 27, 2025
Deserialization of timestamp as a `datetime` failsNov 24, 2025
Environment variable to show full input value in errorsSep 16, 2025
Option to raise raw exceptions in validators instead of always wrapping into `ValidationError`Aug 17, 2025
MyPy read-only errors when mutating a model that has been "un-frozen"Aug 12, 2025
Timeline
First reported:Jul 15, 2025
Last reported:Nov 27, 2025