engram-design
commented
3 weeks ago There's a couple of open issues for this https://github.com/verbb/formie/issues/1856 https://github.com/verbb/formie/issues/1448 and it's a known issue with Ajax-based forms. There's only two real options:
- Add a mechanism to return HTML to show the files that are uploaded upon page submission
- Add a more robust file uploader https://github.com/verbb/formie/issues/133
I'm not a massive fan of the former, and the latter is pretty involved.
The reason we clear the file upload field is that otherwise, every time a page is submitted, the entire form's content will be sent. There's complicated reasons for this rather than just submitting the current page (mostly for conditions).
I suppose another alternative is to have an internal register of field that have been "uploaded" and to ignore them. But that'll be tricky because if a user goes back and changes the uploaded files, we actually do want those uploaded again.
Describe the bug
We have noticed an issue on a multi-page form, where the association to a file uploaded via the File Upload field goes missing when navigating back/forward in the form. This means when the user is on the final page, they cannot submit the form due to an error displayed on the mandatory File Upload field.
For the form I tested this on, the File Upload field is in a group; however, I tested this with another File Upload field and it suffered the same issue.
When I hard refreshed the page, the File Upload field displayed the association beneath the field. However, as soon as I navigated to another page the association was lost.
I think I have isolated the issue and it is caused by the AJAX form submission method. I switched to Page Reload and the File Upload field maintain its association and I was able to successfully submit the form.
Steps to reproduce
Form settings
Craft CMS version
4.9.1
Plugin version
2.1.18
Multi-site?
Yes
Additional context
This issue occurs in all environments