Predefining arguments through closure as an alternative to .bind method?

[sasatatar]

Let's say I have a simple server action that takes postId and message as payload:

// send-message.actions.ts file
"use server";

import { authAction } from "@/lib/safe-action";

const payloadSchema = z.object({
  postId: z.string(),
  message: z.string(),
});

export const addCommentAction = authAction(payloadSchema, (payload: { postId: string, message: string }) => {
    // some logic to add a comment...
});

And let's say I have a simple form component that collects the message input prop that gets called on form submit event with the message entered by the user, I would need to, as suggested by the docs, split up the parameters and use .bind to pass the postId first, and then use the bound function within the component to pass the message.

This however is not going to work if we want to use next-safe-action as it only works with a single parameter passed to the action.
To solve this problem, I came up with this workaround:

// parent server component with access to `postId`
({ postId }: { postId: string }) => {

  const addComment = (message: string) => {
    "use server";
    // postId is available through closure:
    return addCommentAction({ postId, message })
  };
  
  return <AddCommentForm onSubmit={addComment} />
}

I wanted to see what you all think about this approuch, vs the .bind method? Are there some drawbacks to this, or am I perhaps missing something, as to why we should not be doing it this way?

Many thanks in advance!

[TheEdoRan]

v7 supports bind arguments, see related docs here.

[sasatatar]

I forgot to mention, I am aware that v7 supports this (btw. the new version looks amazing, looking forward to it!), but I started migrating our actions before we upgraded to Next.js 15, and most likely, we will not migrate to Next.js 15 until it's stable, so I had to find a solution to make it work with current version of next-safe-action (v6). Also, I am wondering if this is actually a viable alternative to binding arguments in future as well?