useList count supabase

how do i get the total count with useList supabase?

2 Replies

Hi @d4rk51d3. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave: ---------------------- To get the total count with useList when using Supabase as your data provider, you can utilize the meta property to pass the count parameter. By default, the getList method returns the exact count of rows, but you can request an estimated count to improve performance. Here's how you can do it: 1. Exact Count (Default): This will return the exact number of rows, but it might slow down the request depending on the table size. 2. Estimated Count: You can request an estimated count by passing the count property in the meta object. Example Code

import { useList } from "@refinedev/core";

const PostList: React.FC = () => {
  const { data, isLoading, isError } = useList({
    resource: "posts",
    meta: {
      count: "estimated", // Use "exact" for exact count
    },
  });

  if (isLoading) {
    return <div>Loading...</div>;
  }

  if (isError) {
    return <div>Something went wrong!</div>;
  }

  return (
    <div>
      <ul>
        {data?.data.map((post) => (
          <li key={post.id}>{post.title}</li>
        ))}
      </ul>
      <div>Total Count: {data?.total}</div>
    </div>
  );
};

import { useList } from "@refinedev/core";

const PostList: React.FC = () => {
  const { data, isLoading, isError } = useList({
    resource: "posts",
    meta: {
      count: "estimated", // Use "exact" for exact count
    },
  });

  if (isLoading) {
    return <div>Loading...</div>;
  }

  if (isError) {
    return <div>Something went wrong!</div>;
  }

  return (
    <div>
      <ul>
        {data?.data.map((post) => (
          <li key={post.id}>{post.title}</li>
        ))}
      </ul>
      <div>Total Count: {data?.total}</div>
    </div>
  );
};

Explanation - meta: { count: "estimated" }: This line in the useList hook configuration requests an estimated count of the total rows. You can change "estimated" to "exact" if you need the exact count. For more details, you can refer to the Supabase documentation on getList performance (https://refine.dev/docs/data/packages/supabase/#getlist---performance) and the useList hook documentation (https://refine.dev/docs/data/hooks/use-list/#retrieving-the-total-row-count). By using the meta property, you can control how the total count is retrieved, which can help optimize performance based on your application's needs. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•7d ago

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