I have just upgraded my site to K2 2.8.0 (running Joomla 3.5.7).

The Extra Fields tab on the item editing page became empty.

On the Chrome Browser developer tool console, I find the following error:

index.php?option=com_k2&view=item:345 Uncaught ReferenceError: Calendar is not defined
at HTMLInputElement.<anonymous> (index.php?option=com_k2&view=item:345)
at Function.each (jquery.min.js?031647f4ddd9fd4196286abbb5753f8a:2)
at a.fn.init.each (jquery.min.js?031647f4ddd9fd4196286abbb5753f8a:2)
at Object.success (index.php?option=com_k2&view=item:342)
at i (jquery.min.js?031647f4ddd9fd4196286abbb5753f8a:2)
at Object.fireWith [as resolveWith] (jquery.min.js?031647f4ddd9fd4196286abbb5753f8a:2)
at y (jquery.min.js?031647f4ddd9fd4196286abbb5753f8a:4)
at XMLHttpRequest.c (jquery.min.js?031647f4ddd9fd4196286abbb5753f8a:4)

How can I fix it?

Thanks.

Wai

I am running J 3.7.5 and K2 2.8
I assume you are talking about the back end of K2
I do not have the error
Check Extra Fields, Extra Fields Groups, Extra field group assigned to the Category
If all is correct and you are missing extra fields on old items, what happens when you create a new item in a category with extrafields assigned to it.

Yes, i'm talking about the back-end. The extrafields tab is missing even I create a new item.

The extrafields of the existing items can be displayed on the front end without problem.

I figured out that it is OK as long as there is no Date type field in the field group. I do need to use Date field. How can this be fixed?

Wai

I cannot verify the issue as well.

Try clearing all your caches.
A file might have been cached by your browser.
Also, are you using any 3rd party K2 extensions?

Hello,

I've the same issue.

I think that is related about this Joomla issue, that really is a behavior change of the latest versions.

issues.joomla.org/tracker/joomla-cms/17738

Regards

Sorry,

This issue is not a K2 problem.

I disabled the Joomlart plugin ja_k2_filter and now, all work fine.

Regards and sorry one more time

No need to apologise Fransisco,
a lot of users will benefit from this thread,

Hi, Fransisco,

Thank you very much for your posts. Indeed, that solved my problem. No need to apology.

BTW, which version of JA K2 filter are you using? Will the latest version (1.2.8 according to Joomlart) fix this problem?

Thank you very much.

Wai

Hello Wai,

I would suggest asking the K2 Filter devs as well so they can provide a patch.

Seems that Joomlart (JA K2 Filter) is on the way to solve the issue : www.joomlart.com/forums/topic/date-field-dont-work-with-k2-ja-k2-filter-enabled-in-2-8-0/#post-1061640 Temporary solution is very ... temporary (I hope ;-) )

It is a popular extension so I my bet would be that a long-term solution is on its way.

I have the exact same issue after upgrading k2 to version 2.8.0. I have cleared the cache and updated Joomla to 3.8.2. I don't have JA K2 Filter in my website. I use Styleware Filter for K2. I tried disabling that, cleared the cache, but the backend k2 fields are not showing. Its just empty.

This only happens when I go to: Backend -> K2 -> Extra Fields. I have over 20 extra fields overall, and none of them are showing.

But, when I edit the articles or create articles in those categories, the extra fields are visible in the editing screen tab. Also the extra fields shows in the article body.

The backend Extra Fields Groups page shows the groups created.

Its only the Backend -> K2 -> Extra Fields page that is empty. Very unusual.

Thanks,
Neel.

Hello Neel,

Did you check your browser's developer tools' console tab for any issues?