Every article tagged Validation, in one place.
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Pydantic models are the heart of FastAPI. Every field type and constraint becomes runtime validation and documentation. Field constraints from typing import Annotated from pydantic import BaseModel, EmailStr, Field class SignupRequest(BaseModel): email: EmailS...
TypeScript checks your code, not your data. A JSON response, a form submission or an environment variable can be anything at runtime. Zod validates data against a schema and gives you the TypeScript type from that same schema. Define once, get both import { z...
Flexible documents are great until a bug writes price: "free" or forgets a required field. MongoDB can validate documents on every insert and update, regardless of which application wrote them. Creating a collection with a validator await db.createCollection('...
