useExport

useExport hook allows you to export data as a CSV file. It calls the getList method of your data provider and downloads the data as a CSV file.

Internally, it uses export-to-csv to create the CSV file.

Basic Usage​

Here is a basic usage example of the useExport hook:

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

interface IPost {
    id: number;
    slug: string;
    title: string;
    content: string;
}

export const PostList: React.FC = () => {
    const { triggerExport } = useExport<IPost>();

    return <button onClick={triggerExport}>Export Button</button>;
};

Properties​

resource​

Default: Read from the current route

Determines which resource is passed to the getList method of your data provider.

useExport({
    resource: "posts",
});

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 →

mapData​

If you want to map the data before exporting it, you can use the mapData property.

interface IPost {
    id: number;
    slug: string;
    title: string;
    content: string;
    category: {
        id: number;
    };
}

useExport<IPost>({
    mapData: (item) => {
        return {
            id: item.id,
            slug: item.slug,
            title: item.title,
            content: item.content,
            categoryId: item.category.id,
        };
    },
});

sorters​

If you want to sort the data before exporting it, you can use the sorters property. It will be passed to the getList method of your data provider.

For more information, refer to the CrudSorting interface→

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

filters​

If you want to filter the data before exporting it, you can use the filters property. It will be passed to the getList method of your data provider.

For more information, refer to the CrudFilters interface →

useExport({
    filters: [
        {
            field: "title",
            operator: "contains",
            value: "foo",
        },
    ],
});

maxItemCount​

By default, the useExport hook will export all the data. If you want to limit the number of items to be exported, you can use the maxItemCount property.

useExport({
    maxItemCount: 100,
});

pageSize​

Requests to fetch data are made in batches of 20 by default. The pageSize property determines the number of items to be fetched in each request.

useExport({
    pageSize: 50,
});

exportOptions​

You can pass additional options to the export-to-csv package by using the exportOptions property.

For more information, refer to the ExportToCsv options →

useExport({
    exportOptions: {
        filename: "posts",
    },
});

meta​

If you want to send additional data to the create or createMany method of your data provider, you can use the meta property.

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

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.

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

onError​

Callback function that is called when an error occurs while fetching data.

useExport({
    onError: (error) => {
        console.log(error);
    },
});

resourceName​

sorter​

Return Values​

triggerExport​

A function that triggers the export process.

const { triggerExport } = useExport();

return <button onClick={triggerExport}>Export Button</button>;

isLoading​

A boolean value that indicates whether the export process is in progress.

const { isLoading } = useExport();

return isLoading ? <div>Loading...</div> : <div>Loaded</div>;

FAQ​

Handling Relational Data​

A mapping function can be run on all entries before saving them, which is useful in cases where you need to reference relational data or save files in a specific format for processing in other applications.

Consider this endpoint containing some relational data:

[
 {
    "id": 2,
    "title": "Et architecto et aut ex.",
    "slug": "dolorum-et-quia",
    "content": "Reprehenderit qui voluptatem in cum qui odio et.",
    "category": {
      "id": 35
    },
    "user": {
      "id": 10
    },
  },
  {
    "id": 3,
    "title": "Quam maiores officia suscipit quia vel asperiores nisi non excepturi.",
    "slug": "delectus-laborum-provident",
    "content": "Placeat eos esse.",
    "category": {
      "id": 4
    },
    "user": {
      "id": 50
    },
  },
  ...
]

We have the category and user fields as possible relational data keys. Their data is not responsibility of this export operation.

If we want to save their id's without any other related data, we can use a mapping function to save category.id as categoryId and user.id as userId.

useExport<IPost>({
    mapData: (item) => {
        return {
            id: item.id,
            title: item.title,
            slug: item.slug,
            content: item.content,
            categoryId: item.category.id,
            userId: item.user.id,
        };
    },
});

interface ICategory {
    id: number;
    title: string;
}

interface IPost {
    id: number;
    title: string;
    content: string;
    slug: string;
    category: { id: number };
    user: { id: number };
}

This will save the data as follows:

[
  {
    "id": 2,
    "title": "Et architecto et aut ex.",
    "slug": "dolorum-et-quia",
    "content": "Reprehenderit qui voluptatem in cum qui odio et.",
    "categoryId": 35,
    "userId": 10
  },
  {
    "id": 3,
    "title": "Quam maiores officia suscipit quia vel asperiores nisi non excepturi.",
    "slug": "delectus-laborum-provident",
    "content": "Placeat eos esse.",
    "categoryId": 4,
    "userId": 50
  },
  ...
]

API Reference​

Properties​

Return Values​

Type Parameters​