Request Bodies with Pydantic
FastAPI uses Pydantic for automatic validation and serialization:
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LearnStep 1 of 3
Pydantic Models
Learning Objectives
- •Define Pydantic models
- •Validate request bodies
- •Use nested models
Lesson Outline
LearnStep 1/3
Pydantic Models
python
Automatic Features
- Validation: Type checking and constraints
- Conversion: "42" → 42 for integers
- Documentation: Schema in OpenAPI docs
- IDE Support: Full autocompletion
python