在 react-admin 中，如何为 UrlField href 添加前缀？

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

<UrlField> only accepts a URL value. For your use case, you should write a custom field based on the UrlField source . Something like:

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

const MyUrlField = ({ source }) => {
    const record = useRecordContext();
    const value = record && record[source];

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

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

MyUrlField.defaultProps = {
    addLabel: true,
};

Answer 2

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
/>

Answer 3

I'm new to react-admin. I was following the tutorial and came across the idea of doing something like this because the user's website is just bla.com and it doesn't actually work because you get http://localhost:xxxx/bla.com as a link. I came up with this method to do it, in typescript. Take it with a grain of salt:

/// user-url.field.tsx
import { UrlField, useRecordContext } from 'react-admin';

export const UserURLField = ({source}: {source: string}) => {
  const record = useRecordContext();
  const fakeRecord = {
    [source]: `http://${record[source]}`,
  };
  return (
  <UrlField source={source} record={fakeRecord}></UrlField>
  );
};