Prefilled Create form is not working with URL parameters

[nicgirault]

What you were expecting:

According to the doc of version 3.1.2 https://marmelab.com/react-admin/CreateEdit.html:

What happened instead:

But in this sandbox https://codesandbox.io/s/simple-demo-882rq we can see that the form is not filled when clicking on the create button.

Other information:

I need to use URL params and not location state because I need a link to share with prefilled form.
It seems related to this part of the code: https://github.com/marmelab/react-admin/blob/master/packages/ra-core/src/controller/useCreateController.ts#L157

Environment

• React-admin version: 3.1.2
• React version: 16.12

[nicgirault]

So actually the doc is outdated. It should look like something like this:

<Button
        color="primary"
        component={Link}
        to={{
          pathname: `/content-records/create`,
          search: `?source=${JSON.stringify({
            title: 'test',
          })}`,
        }}
      >
        Create
      </Button>