Queries

⚠️

Unforunately, we require you to be explicit in the select statement fields, and not use a wildcard ('*'), since mutations need to know the columns to derive whether the query cache should be updated with new values. Note that the wildcard selector is not allowed on any level, so you can't use it for relations either.

The cache helpers query hooks wrap the data fetching hooks of the cache libraries and pass both the cache key and the fetcher function from on the PostgREST query. This is enabled primarily by a parser that turns any Supabase PostgREST query into a definite cache key. For example,

client
  .from("contact")
  .select("id,username,ticket_number", { count: "exact" })
  .eq("username", "psteinroe");

is parsed into

postgrest$null$public$contact$select=id%2Cusername%2Cticket_number&username=eq.psteinroe$null$count=exact$head=false$

`useQuery`

Wrapper around the default data fetching hook that returns the query including the count without any modification of the data. The config parameter of the respective library can be passed as the second argument.

import { useQuery } from "@supabase-cache-helpers/postgrest-swr";
 
const client = createClient<Database>(
  process.env.SUPABASE_URL,
  process.env.SUPABASE_ANON_KEY
);
 
function Page() {
  const { data, count } = useQuery(
    client
      .from("contact")
      .select("id,username,ticket_number", { count: "exact" })
      .eq("username", "psteinroe"),
    {
      revalidateOnFocus: false,
      revalidateOnReconnect: false,
    }
  );
  return <div>...</div>;
}

`usePaginationQuery`

Wrapper around the infinite hooks that transforms the data into pages and returns helper functions to paginate through them. The range filter is automatically applied based on the pageSize parameter. The respective configuration parameter can be passed as second argument.

nextPage() and previousPage() are undefined if there is no next or previous page respectively. setPage allows you to jump to a page.

The hook does not use a count query and therefore does not know how many pages there are in total. Instead, it queries one item more than the pageSize to know whether there is another page after the current one.

import { usePaginationQuery } from '@supabase-cache-helpers/postgrest-swr';
import { createClient } from '@supabase/supabase-js';
import { Database } from './types';
 
const client = createClient<Database>(
  process.env.SUPABASE_URL,
  process.env.SUPABASE_ANON_KEY
);
 
function Page() {
  const {
    currentPage,
    nextPage,
    previousPage,
    setPage,
    pages,
    pageIndex,
    isValidating,
    error,
  } = usePaginationQuery(
    client
      .from('contact')
      .select('id,username')
      .order('username', { ascending: true }),
    { pageSize: 1, revalidateOnReconnect: true }
  );
  return <div>...</div>;
}

`useInfiniteScrollQuery`

Wrapper around the infinite hooks that transforms the data into a flat list and returns a loadMore function. The range filter is automatically applied based on the pageSize parameter. The SWRConfigurationInfinite can be passed as second argument.

loadMore() is undefined if there is no more data to load.

The hook does not use a count query and therefore does not know how many items there are in total. Instead, it queries one item more than the pageSize to know whether there is more data to load.

import { useInfiniteScrollQuery } from '@supabase-cache-helpers/postgrest-swr';
import { createClient } from '@supabase/supabase-js';
import { Database } from './types';
 
const client = createClient<Database>(
  process.env.SUPABASE_URL,
  process.env.SUPABASE_ANON_KEY
);
 
function Page() {
  const { data, loadMore, isValidating, error } = useInfiniteScrollQuery(
    client
      .from('contact')
      .select('id,username')
      .order('username', { ascending: true }),
    { pageSize: 1 }
  );
  return <div>...</div>;
}

`useInfiniteQuery`

Wrapper around the infinite hook that returns the query without any modification of the data.

import { useInfiniteQuery } from '@supabase-cache-helpers/postgrest-swr';
import { createClient } from '@supabase/supabase-js';
import { Database } from './types';
 
const client = createClient<Database>(
  process.env.SUPABASE_URL,
  process.env.SUPABASE_ANON_KEY
);
 
function Page() {
  const { data, size, setSize, isValidating, error, mutate } = useInfiniteQuery(
    client
      .from('contact')
      .select('id,username')
      .order('username', { ascending: true }),
    { pageSize: 1 }
  );
  return <div>...</div>;
}

Getting Started Mutations