useCustom

The useCustom hook expects the url and method properties, which will be passed to the custom method from the dataProvider as parameters.

When properties are changed, the useCustom hook will trigger a new request.

import { useCustom, useApiUrl } from "@refinedev/core";

interface PostUniqueCheckResponse {
  isAvailable: boolean;
}

const apiUrl = useApiUrl();

const { data, isLoading } = useCustom<PostUniqueCheckResponse>({
  url: `${apiUrl}/posts-unique-check`,
  method: "get",
  config: {
    headers: {
      "x-custom-header": "foo-bar",
    },
    query: {
      title: "Foo bar",
    },
  },
});

This prop will be passed to the custom method from the dataProvider as a parameter. It is usually used to specify the endpoint of the request.

useCustom({
  url: "www.example.com/api/get-products",
});

It will be passed to the custom method from the dataProvider as a parameter. It is usually used to specify the HTTP method of the request.

useCustom({
  method: "get",
});

It will be passed to the custom method from the dataProvider as a parameter. It can be used to specify the headers of the request.

useCustom({
  config: {
    headers: {
      "x-custom-header": "foo-bar",
    },
  },
});

It will be passed to the custom method from the dataProvider as a parameter. It can be used to specify the query parameters of the request.

useCustom({
  config: {
    query: {
      title: "Foo bar",
    },
  },
});

It will be passed to the custom method from the dataProvider as a parameter. It can be used to specify the payload of the request.

useCustom({
  config: {
    payload: {
      title: "Foo bar",
    },
  },
});

It will be passed to the custom method from the dataProvider as a parameter. It can be used to send the sort query parameters of the request.

useCustom({
  config: {
    sorters: [
      {
        field: "title",
        order: "asc",
      },
    ],
  },
});

It will be passed to the custom method from the dataProvider as a parameter. It can be used to send the filter query parameters of the request.

useCustom({
  config: {
    filters: [
      {
        field: "title",
        operator: "contains",
        value: "Foo",
      },
    ],
  },
});

queryOptions is used to pass additional options to the useQuery hook. It is useful when you want to pass additional options to the useQuery hook.

For more information, refer to the useQuery documentation →

useCustom({
  queryOptions: {
    retry: 3,
    enabled: false,
  },
});

meta is a special property that can be used to pass additional information to data provider methods for the following purposes:

• Customizing the data provider methods for specific use cases.
• Generating GraphQL queries using plain JavaScript Objects (JSON).

In the following example, meta is passed to the custom method from the dataProvider as a parameter:

useCustom({
  meta: {
    foo: "bar",
  },
});

const myDataProvider = {
  //...
  custom: async ({
    url,
    method,
    sort,
    filters,
    payload,
    query,
    headers,
    meta,
  }) => {
    const foo = meta?.foo;

    console.log(foo); // "bar"

    //...
  },
  //...
};

For more information, refer to the meta section of the General Concepts documentation→

This prop allows you to specify which dataProvider if you have more than one. Just pass it like in the example:

useCustom({
  dataProviderName: "second-data-provider",
});

NotificationProvider is required for this prop to work.

This prop allows you to customize the success notification that shows up when the data is fetched successfully and useCustom calls the open function from NotificationProvider:

useCustom({
  successNotification: (data, values) => {
    return {
      message: `${data.title} Successfully fetched.`,
      description: "Success with no errors",
      type: "success",
    };
  },
});

NotificationProvider is required for this prop to work.

This prop allows you to customize the error notification that shows up when the data fetching fails and the useCustom calls the open function from NotificationProvider

useCustom({
  errorNotification: (data, values) => {
    return {
      message: `Something went wrong when getting ${data.id}`,
      description: "Error",
      type: "error",
    };
  },
});

If you want loading overtime for the request, you can pass the overtimeOptions prop to the this hook. It is useful when you want to show a loading indicator when the request takes too long. interval is the time interval in milliseconds. onInterval is the function that will be called on each interval.

Return overtime object from this hook. elapsedTime is the elapsed time in milliseconds. It becomes undefined when the request is completed.

const { overtime } = useCustom({
  //...
  overtimeOptions: {
    interval: 1000,
    onInterval(elapsedInterval) {
      console.log(elapsedInterval);
    },
  },
});

console.log(overtime.elapsedTime); // undefined, 1000, 2000, 3000 4000, ...

// You can use it like this:
{
  elapsedTime >= 4000 && <div>this takes a bit longer than expected</div>;
}

To invalidate a query, you can use the invalidateQueries method from the useQueryClient hook provided by the @tanstack/react-query library:

import { useQueryClient } from "@tanstack/react-query";

const queryClient = useQueryClient();

queryClient.invalidateQueries(["custom-key"]);

Note that you'll need to know the query key to invalidate the query. If you don't know the query key, you can use the queryOptions property of the useCustom hook:

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

useCustom({
  queryOptions: {
    queryKey: ["custom-key"],
  },
});