Input Validation

📝 NOTE: For example project structure reference, click here

So now that we have created our exportable server actions but how to get user input and validate it?

For this you gonna need a zod schema for the required inputs by the final branch. Back in our final branch, call input method and provide a zod schema. The inputs will be validated internally and validated inputs will be included in context as context.inputs = <validated-inputs>.

// app/actions/index.ts
"use server";
 
import { blogsRouter } from "@/lib/action.router.ts";
 
const deleteBlogSchema = z.object({
  id: z.string(),
});
 
export const deleteBlog = blogsRouter
  .branch()
  .input(deleteBlogSchema)
  .use(async ({ context }) => {
    // ✨ context.inputs: { id: string }
    const blog = await callToDatabse(context.inputs.id);
    // extending the context
    return {
      blog: blog,
      ...context,
    };
  })
  .run(async () => {
    // final action handler
  });

⚠️

If you're expecting inputs from the user then you must call the input method only in the final branch where you're creating an exportable server action. Because of the limitation of the current implementation, this is not enforced neither on type level nor on runtime level. You manually have to make sure of that.

2. Middlewares 4. Action handler