withZodValidation

Before using this middleware, you’ll need to install zod:


npm install zod


pnpm add zod


yarn add zod


bun add zod

This middleware validates input against a Zod-compatible schema:


import { z } from "zod";
import { withZodValidation, applyMiddleware, serverAction } from "use-server-action/server";
 
const CreateUserSchema = z.object({
    name: z.string().min(1, "Name is required"),
    email: z.string().email("Invalid email"),
});
 
const createUser = serverAction(async (input: z.infer<typeof CreateUserSchema>) => {
    return await db.user.create({ data: input });
});
 
export const validatedCreateUser = applyMiddleware(createUser, [
    withValidation(CreateUserSchema),
]);

Options


withZodValidation(schema, {
    // Custom error code (default: "VALIDATION_ERROR")
    code: "INVALID_INPUT",
 
    // Custom error message formatter
    formatError: (error) => {
        return error.errors?.map(e => e.message).join(", ") ?? "Invalid input";
    },
});