ls-deno/routes/note/create.tsx

import { Handlers, PageProps } from "$fresh/server.ts";
import { query } from "@/db.ts";
import { Page } from "@/components/Page.tsx";

type NoteID = string;

export const handler: Handlers<NoteID> = {
  async POST(request, context) {
    const content = (await request.formData()).get("content");
    if (!content) throw "no content provided";
    const result = await query<{ id: string }>(
      "insert into note (content) values ($1) returning id",
      [content],
    );
    if (!result) throw "insert failed";
    const { rows: [{ id }] } = result;
    return await context.render(id);
  },
};

export default function NotesPage({ data: noteId }: PageProps<NoteID>) {
  return (
    <Page>
      <h1>You created a note!</h1>
      <a href="/note">Back to notes</a>
      <a href={`/note/${noteId}`}>View your note</a>
    </Page>
  );
}