outis99•3y ago

Can I redirect the user from inside my router?

I have a query protectedProcedure, which returns an object from my prisma planetscale db What's the best way to redirect the user to a 404 page if the item doesn't exist on the db? I wanted something like res.redirect("/404") but can't seem to find a way to do it Should I just handle it in the front-end with a useEffect?

4 Replies

tomheaton•3y ago

on your useQuery you can add an onError handler where you could redirect the user after raising a trpc error in your router when no item is found

outis99OP•3y ago

That might actually be what I want, thank you!

outis99OP•3y ago

client

const { data } = trpc.project.get.useQuery({ slug: String(router.query.slug) }, {
    enabled: typeof router.query.slug === "string",
    onError(err) {
      console.log(err, 'error123')
      //router.push("/404")
    },
  })

const { data } = trpc.project.get.useQuery({ slug: String(router.query.slug) }, {
    enabled: typeof router.query.slug === "string",
    onError(err) {
      console.log(err, 'error123')
      //router.push("/404")
    },
  })

server

 get: protectedProcedure
    .input(z.object({ slug: z.string() }))
    .query(async ({ input, ctx }) => {
      const project = await ctx.prisma.project.findFirst({
        where: {
          slug: input.slug,
          user: {
            email: ctx.session.user.email,
          },
        },
        include: {
          columns: {
            include: {
              cards: true,
            },
          },
        },
      });
      if (!project?.id)
        throw new TRPCError({ code: "NOT_FOUND", message: "eza" });
      else return { project };
    }),

 get: protectedProcedure
    .input(z.object({ slug: z.string() }))
    .query(async ({ input, ctx }) => {
      const project = await ctx.prisma.project.findFirst({
        where: {
          slug: input.slug,
          user: {
            email: ctx.session.user.email,
          },
        },
        include: {
          columns: {
            include: {
              cards: true,
            },
          },
        },
      });
      if (!project?.id)
        throw new TRPCError({ code: "NOT_FOUND", message: "eza" });
      else return { project };
    }),

outis99OP•3y ago

For some reason the query executes 4 times and only executes the onError function on the 4th time, which in total takes like 5 seconds Also I'm using enabled here to conditionally execute the query when the next/router is ready, if anyone has a better implementation would love to hear it