javascript / intermediate
Snippet
Server-Side Schema Validation with Zod
Using Zod for schema validation in Server Actions ensures that data is type-safe and valid before it reaches your database. It provides a robust way to handle malformed user input.
snippet.js
javascript
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import { z } from 'zod';const schema = z.object({email: z.string().email(),age: z.number().min(18),});export async function createUser(formData: FormData) {const validatedFields = schema.safeParse({email: formData.get('email'),age: Number(formData.get('age')),});if (!validatedFields.success) {return { errors: validatedFields.error.flatten().fieldErrors };}// Proceed with DB logic}
nextjs
Breakdown
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z.object({...})
Defines the shape and constraints of the expected data.
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safeParse(...)
Checks the data without throwing an error, returning a result object instead.