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[Richard Mansfield <645040@xxxxxxxxxxxxxxxxxx>]

** Changed in: mahara
       Status: New => Fix Committed

** Changed in: mahara
     Assignee: (unassigned) => Richard Mansfield (richard-mansfield)

** Changed in: mahara
    Milestone: None => 1.4.0

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Too many view columns during parallel editing
https://bugs.launchpad.net/bugs/645040
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Status in Mahara ePortfolio: Fix Committed

Bug description:
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