Per Nergård
Nov 21, 2012
(2 votes)

Weirdest bug of the year?

Today I was deploying some new functionality on a customer site which included adding a couple of new properties.

Added the properties and code and tested the new function and all was ok. So now it was only left to move the properties to the correct position with drag and drop and I would be done.

I moved the properties to the desired position and would just do a last check that everything was ok.

I  tried to create a page of the changed type but when I published the page it exploded with a cryptic null reference exception. Browsing to an already existing page of the affected type gave the same error.

I should immediately have come to the conclusion that the drag and drop positioning of the properties had caused this but I didn’t.

Panic! I rolled back the changes with no change, I started considering some weird corruption of the page type in the database and all other strange things.

Then I remembered that we on this particular page type have a property with a default value that is used to control the rendering of the page.

I checked the property and compared to a staging environment and the default value was gone!!

Sure enough adding the value and saving the property  corrected the error.

I then recreated the error in my development environment. Moving a property on a page type and “crossing” another property with a default value will in fact remove that default value!

We sure missed something in our fallback code but I guess that It can be good to be aware of this if you suddenly get some weird error after doing a little property rearranging.

This was for a CMS6 R2 installation.

Nov 21, 2012


Eric Nov 21, 2012 08:46 PM

Nice feature :) reported as a bug to episerver?

Nov 21, 2012 09:17 PM

Eric: Yes I have reported it to EPiServer.

Nov 22, 2012 02:12 PM

Similar issues with default values being lost can be caused when using CMS 6 R2 and PageTypeBuilder and having page type properties with the same sort order.

Please login to comment.
Latest blogs
Preview multiple Visitor Groups directly while browsing your Optimizely site

Visitor groups are great - it's an easy way to add personalization towards market segments to your site. But it does come with it's own set of...

Allan Thraen | Sep 26, 2022 | Syndicated blog

The Report Center is finally back in Optimizely CMS 12

With Episerver.CMS.UI 12.12.0 the Report Center is finally re-introduced in the core product.

Tomas Hensrud Gulla | Sep 26, 2022 | Syndicated blog

Dynamic Route in ASP.NET Core When MapDynamicControllerRoute Does Not Work

Background Creating one of the add-on for Optimizely I had to deal with challenge to register dynamically route for the API controller. Dynamic rou...

valdis | Sep 25, 2022 | Syndicated blog

404 Error on Static Assets Within an Optimizely plugin

Background With the move to CMS 12 and .NET 5/6, developers are now able to build Plugins and Extensions using Razor Class Libraries (RCL).  These...

Mark Stott | Sep 23, 2022

How to bypass the content creation view in Optimizely

Something that has come up a couple of times in the last few year is feedback from content editors about the editing view that comes up when creati...

Ynze | Sep 23, 2022 | Syndicated blog

Welcome to Optimizely World's New Tech Video Portal

Optimizely, leader in the digital experience realm, has become a wealth of world class SaaS products including Web Experimentation, Full Stack, B2B...

The Developer Marketing Team of Optimizely | Sep 22, 2022