Twill

Hi, using Twill3 I added a files form field as directive by following the steps here:
https://twillcms.com/docs/form-fields/files.html

`@formField('files', [
   'name' => 'pdf_file',
   'label' => 'File',
   'itemLabel' => 'PDF File'
])`

I added the `HasFiles` and `HandleFiles` traits to the model and repo.

The form shows up and I am able to upload the file but it won't "stick" when I press save. Any tips what else I should do?

Hi <@780651161949831198> it is not clear enough in the docs I think but it's there, you need to add this to your model:

```
public $filesParams = ['pdf_file'];
```

all your files field names should be in this array for them to save properly

if the files field is in a block, the name should be in `twill.block_editor.files`

ah, OK. Yeah, that's not clear in the docs but makes sense now. Thanks!