useQuery with query params

Hi, I'm wondering how to correctly handle query params as a useQuery input using Nextjs.

const RecipeDetailPage: NextPageWithLayout = () => {
  const router = useRouter();

  const querySchema = z.object({ id: z.string() });
  const query = querySchema.safeParse(router.query);

  const recipe = api.recipes.getRecipeById.useQuery(query.data?.id, {
    enabled: query.success,
  });

  if (!recipe.data) return null;

  return <RecipeDetail recipe={recipe.data} />;
};

const RecipeDetailPage: NextPageWithLayout = () => {
  const router = useRouter();

  const querySchema = z.object({ id: z.string() });
  const query = querySchema.safeParse(router.query);

  const recipe = api.recipes.getRecipeById.useQuery(query.data?.id, {
    enabled: query.success,
  });

  if (!recipe.data) return null;

  return <RecipeDetail recipe={recipe.data} />;
};

Since useRouter.query returns undefined on first render, I need to parse the query. This works, however there's still a type error on the query.data?.id, since it could be null, and the query expects a string. What is the right way to handle a situation like this.

1 Reply

Maj•2y ago

u can do enabled: router.isReady

const router = useRouter();
const { categoryId } = router.query;
 const { data: categoryProducts, isFetched } = api.category.getCategoryItems.useQuery(
        { name: categoryId as string[] },
        { enabled: router.isReady, refetchOnWindowFocus: false },
    )

const router = useRouter();
const { categoryId } = router.query;
 const { data: categoryProducts, isFetched } = api.category.getCategoryItems.useQuery(
        { name: categoryId as string[] },
        { enabled: router.isReady, refetchOnWindowFocus: false },
    )

This is how i use it.