Empty charts added on every save, can't remove charts

Hi @rmorelli,

I've tried to reproduce this issue on a Drupal 10 environment with PHP 8.1 and the Charts module version 5.0.x-dev, which is the same version mentioned in this issue.

Here are the steps I followed:

1- I added a chart field to the Article content type with unlimited values.
2- Created a new article without any data in the chart field and saved it. I observed that no empty chart was added.
3- I edited the article but not the chart field and saved it again. Still, no empty chart was appended.
4- Finally, I added data to the chart field, saved the article and then I went to edit mode and saved it. I observed the chart displayed correctly with the added data.

Upon following these steps, I couldn't replicate the issue of empty charts being added or being unable to remove them.

Questions:

- Could you provide more details on your environment?
- Are there any other modules interacting with the Charts module?
- Any special configurations or settings you have applied?

Thank you!

Moving this to a support request, as I have not experienced this and @tguerineau was not able to replicate.

I’m experiencing this using Charts with the Paragraphs module on Drupal 9.5 and PHP 7.4 (will test on PHP 8.1). I’ve also noticed this behavior with Address fields (with default values set) in a Paragraphs module under Drupal 7.

Have you tried changing default values for the Charts module to see if that makes it reproducible (I’ve done so in my install—specifically perhaps chart type and definitely the colors)?

@rmorelli

Looking forward to hearing about the experience. I found that if I set a fixed maximum, it creates that fixed maximum right away.

The duplication is an annoyance, but not being able to remove extra instances is a real challenge.

I’m using billboard.js via CDN and am seeing some javascript errors from it of "f is undefined." Going to try a local library to see if that makes a difference.

Edit: Local files didn't work. Using it on PHP 8.1 (Drupal 9.5.11) I’m still seeing the incremental creation of charts and no ability to remove additional charts. The javascript error is now gone, however.

I think the main issue is really here: https://www.drupal.org/project/drupal/issues/2980806

However, I will try to find a way to address it.

In the merge request/patch (you can download from the merge request), I've added a method that checks if there are data before adding the chart. For me, solving the Core issue would be ideal, but you can use this patch in the meantime, that should help.

Marking this as fixed. If we want to go back and provide a better solution later, let's do that in a separate ticket.