Validation & Error Handling in Server Actions
Build robust Server Actions by validating input with Zod, returning structured error states, and surfacing them in your forms with useActionState.
Why Validate Server Actions?
Server Actions receive data straight from the client, which can never be trusted. Validation guards against malformed input, injection, and broken business rules before anything touches your database.
Reading FormData
A Server Action bound to a form receives a FormData object. You read fields by name, but every value arrives as a string.
'use server';
export async function createPost(formData: FormData) {
const title = formData.get('title');
const views = formData.get('views');
}All lessons in this course
- Optimistic UI Updates
- File Uploads with Actions
- Validation & Error Handling in Server Actions