Too many view columns during parallel editing

[Jürgen Zimmer]

We have a Mahara 1.2.5 on a Linux server with MySQL Database.

During a Mahara Tutorial 25 people where editing a group view in parallel using the buttons add and remove columns.
After a while, displaying the view ended in a system error. A look in the database revealed that the view had 7 as the number of columns and (null) as its layout. Default layouts are only available up to 5 columns.
The function get_layout() in lib/view.php could therefore not determine a layout anymore.
I believe this is a Mahara bug. There should be some transactional mechanism between the JavaScript and the PHP script that prevents users from creating more than 5 columns in a view.

I just hacked the get_layout function to simply set the number of columns to 5 in case it's bigger than 5, but this is not a permanent solution.

Thanks in advance
   Juergen Zimmer