useShow Hook | Refine v4

import BasicUsageLivePreview from "./_basic-usage-live-preview.md"; import PropResource from "@site/src/partials/prop-resource";

useShow is an extended version of useOne that supports all of its features and adds some more.

It is useful when you want to fetch a single record from the API. It will return the data and some functions to control the query.

Usage

The useShow hook does not expect any properties. By default, it will try to read the resource and id values from the current URL. It will be passed to the getOne method from the dataProvider as a parameter.

If you define resource and id on the hook, when these properties are changed, the useShow hook will trigger a new request.

Realtime Updates

LiveProvider is required for this prop to work.

When the useShow hook is mounted, it will call the subscribe method from the liveProvider with some parameters such as channel, resource etc. It is useful when you want to subscribe to live updates.

Properties

resource

<PropResource hook={{ name:"useOne", URL:"/docs/core/data/hooks/use-one/" }} method={{ name:"getOne", URL:"/docs/core/providers/data-provider/#getone" }} hasDefault={false} />

By default, it will try to read the resource value from the current URL.

useShow({
  resource: "categories",
});

If the resource is passed, the id from the current URL will be ignored because it may belong to a different resource. To retrieve the id value from the current URL, use the useParsed hook and pass the id value to the useShow hook.

import { useShow, useParsed } from "@refinedev/core";

const { id } = useParsed();

useShow({
  resource: "custom-resource",
  id,
});

Or you can use the setId function to set the id value.

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

const { setShowId } = useShow({
  resource: "custom-resource",
});

setShowId("123");

If you have multiple resources with the same name, you can pass the identifier instead of the name of the resource. It will only be used as the main matching key for the resource, data provider methods will still work with the name of the resource defined in the <Refine/> component.

For more information, refer to the identifier of the <Refine/> component documentation &#8594

id

It will be passed to the getOne method from the dataProvider as a parameter. It is used to determine which record to fetch. By default, it will try to read the id value from the current URL.

useShow({
  id: 123,
});

meta

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, we pass the headers property in the meta object to the create method. With similar logic, you can pass any properties to specifically handle the data provider methods.

useShow({
  // highlight-start
  meta: {
    headers: { "x-meta-data": "true" },
  },
  // highlight-end
});

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

    //...
    //...

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

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

For more information, refer to the meta section of the General Concepts documentation &#8594

dataProviderName

If there is more than one dataProvider, you can specify which one to use by passing the dataProviderName prop. It is useful when you have a different data provider for different resources.

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

queryOptions

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.

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

For more information, refer to the useQuery documentation&#8594

successNotification

NotificationProvider is required for this prop to work.

After data is fetched successfully, useShow can call open function from NotificationProvider to show a success notification. With this prop, you can customize the success notification.

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

errorNotification

NotificationProvider is required for this prop to work.

After data fetching is failed, useShow will call the open function from NotificationProvider to show an error notification. With this prop, you can customize the error notification.

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

liveMode

LiveProvider is required for this prop to work.

Determines whether to update data automatically ("auto") or not ("manual") if a related live event is received. It can be used to update and show data in Realtime throughout your app.

useShow({
  liveMode: "auto",
});

For more information, refer to the Live / Realtime page&#8594

onLiveEvent

LiveProvider is required for this prop to work.

The callback function is executed when new events from a subscription have arrived.

useShow({
  onLiveEvent: (event) => {
    console.log(event);
  },
});

liveParams

LiveProvider is required for this prop to work.

Params to pass to liveProvider's subscribe method.

overtimeOptions

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 } = useShow({
  //...
  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>;
}

Return Values

query

It is TanStack Query's useQuery return values.

For more information, refer to the useQuery documentation&#8594

showId

It is the id value that is used on the useShow hook.

setShowId

When you want to change the showId value, you can use this setter. It is useful when you want to change the showId value based on the user's action.

It will trigger new request to fetch the data when the showId value is changed.

overtime

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

const { overtime } = useShow();

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

queryResult <PropTag deprecated />

Use query instead.

API Reference

Props

Type Parameters

Return values