use mutate to trigger re-fetch for signup list

src/pages/signup/[id].tsx

@@ -3,6 +3,8 @@ import { NextPage, GetStaticProps, GetStaticPaths } from "next";
 import Head from "next/head";
 import { useRouter } from "next/router";
 import { toast } from "react-toastify";
+import axios from "axios";
+import useSWR, { mutate } from "swr";
 import { Signup, SignupForm } from "@models/Signup";
 import SignupApi from "@api/signupApi";
 import SignUpPageView from "@views/SignUpPage/SignUpPageView";
@@ -12,11 +14,18 @@ import noop from "@utils/noop";
 import NotFoundPage from "@pages/404";
 
 type InitialProps = {
-  form: SignupForm;
+  initialForm: SignupForm;
 };
 
-const SignUpPage: NextPage<InitialProps> = ({ form }) => {
+const FORM_URL = `${process.env.NEXT_PUBLIC_API_URL}/signupForm/`;
+
+const SignUpPage: NextPage<InitialProps> = ({ initialForm }) => {
   const router = useRouter();
+  const id = String(initialForm.id);
+  const URL = `${FORM_URL}${id}/`;
+  const signupResult = useSWR(URL, (url) => axios.get(url).then((res) => res.data), { initialData: initialForm });
+
+  const form = signupResult.data ?? initialForm;
 
   if (router.isFallback) {
     return <LoadingView />;
@@ -37,7 +46,7 @@ const SignUpPage: NextPage<InitialProps> = ({ form }) => {
     try {
       await SignupApi.createSignup(payload);
       toast.success("Sign-up submitted successfully 😎");
-      router.push(window.location.href); // TODO: Fetch/update signup list, so user sees the signup in the list
+      mutate(URL);
     } catch (error) {
       console.error(error);
       toast.error("Uh oh! Sign-up failed! 😟");
@@ -78,15 +87,15 @@ export const getStaticPaths: GetStaticPaths = async () => {
 export const getStaticProps: GetStaticProps<InitialProps> = async ({ params }) => {
   const { id } = params;
   let notFound = false;
-  let form: SignupForm;
+  let initialForm: SignupForm;
   try {
-    form = await SignupApi.getForm(Number(id));
+    initialForm = await SignupApi.getForm(Number(id));
   } catch {
     notFound = true;
   }
   return {
     props: {
-      form,
+      initialForm,
     },
     revalidate: 10,
     notFound,