General Concepts

• refine core is fully independent of UI. So you can use core components and hooks without any UI dependency.
• All the data related hooks(useTable, useForm, useList etc.) of refine can be given some common properties like resource, metaData, queryOptions etc.

resource

refine passes the resource to the dataProvider as a params. This parameter is usually used to as a API endpoint path. It all depends on how to handle the resource in your dataProvider. See the creating a data provider section for an example of how resource are handled.

How does refine know what the resource value is?

1- The resource value is determined from the active route where the component or the hook is used.

Like below, if you are using the hook in the <PostList> component, the resource value defaults to "posts".

import { Refine } from "@pankod/refine-core";
import dataProvider from "@pankod/refine-simple-rest";
import routerProvider from "@pankod/refine-react-router-v6";

import { PostList } from "pages/posts/list.tsx";

const App: React.FC = () => {
  return (
    <Refine
      routerProvider={routerProvider}
      dataProvider={dataProvider("https://api.fake-rest.refine.dev")}
      resources={[
        {
          name: "posts",
          list: PostList,
        },
      ]}
    />
  );
};

export default App;

2- The resource value is determined from the resource prop of the hook.

You can override the default resource value hook by passing the resource prop to the hook like below:

import { useTable } from "@pankod/refine-core";

const PostList: React.FC = () => {
  const result = useTable({
    //highlight-next-line
    resource: "users",
  });

  return <div>...</div>;
};

How can I request an API with nested route?

Refer to how to use resource with nested routes documentation for more information. &#8594

metaData

metaData is used following two purposes:

• To pass additional information to data provider methods.
• Generate GraphQL queries using plain JavaScript Objects (JSON).

How to use metaData to pass additional information to data provider methods?

useOne({
    resource: "posts",
    id: 1,
    // highlight-start
    metaData: {
        headers: { "x-meta-data": "true" },
    },
    // highlight-end
});

const myDataProvider = {
    ...
    getOne: async ({ resource, id, metaData }) => {
        // highlight-next-line
        const headers = metaData?.headers ?? {};
        const url = `${apiUrl}/${resource}/${id}`;

        //highlight-next-line
        const { data } = await httpClient.get(url, { headers });

        return {
            data,
        };
    },
    ...
};

In the above example, we pass the headers property in the metaData object to the getOne method. With similar logic, you can pass any properties to specifically handle the data provider methods.

Refer to the how to pass metaData to your existing dataProvider methods. &#8594

Refer to the GraphQL guide to learn how to use metaData to create GraphQL queries. &#8594