In react-admin, how can I prefix a UrlField href?

Question

Let's say I have the following:

<UrlField source='fbUsername' />

If the result is fb username foo, this links relatively to /foo.

(?) How can I prefix this url to:

https://facebook.com/

So the result would be:

https://facebook.com/${fbUsername}

https://facebook.com/foo

Answer 1

Based on @françois-zaninotto 's answer, I fixed a syntax error fixed some of the missing useRecordContext() param that made it work:

// ###############################################
// FbUrlField.js
import * as React from 'react';
import { Link } from '@material-ui/core';
import { useRecordContext } from 'react-admin';

const FbUrlField = ( props ) =>
{
    const { source, target, rel } = props;
    const record = useRecordContext(props);
    const value = record && record[source];

    if (value == null) {
        return null;
    }

    return (
        <Link href={`https://facebook.com/${value}`} target={target} rel={rel}>
            {value}
        </Link>
    );
};

FbUrlField.defaultProps = {
    addLabel: true,
};

export default FbUrlField;


// ###############################################
// SomeList.js
import FbUrlField from './FbUrlField';
[...]
<FbUrlField
    label='FB'
    source='fbUsername'
    target='_blank' // New window
    rel="noopener noreferrer" // For security
/>