Server-Side Schema Validation with Zod

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
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

z.object({...})

Defines the shape and constraints of the expected data.

safeParse(...)

Checks the data without throwing an error, returning a result object instead.

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Server-Side Schema Validation with Zod

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