add 

attr_accessible :my_attribute_name.....

to your model.rb file

tom

On Apr 2, 2012, at 5:33 , aekwolf wrote:

> Hey guys, I've just started with Rails. I'm going through the getting
> started tutorial, and I'm running into this error:
> ActiveModel::MassAssignmentSecurity::Error in PostsController#update
> I know it has to do with the new update and the whitelist attributes,
> but I don't have the first idea how to fix it.
> 
> Any help would be extremely appreciated!
> 
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-- 
===============================================================================
Tomas Meinlschmidt, MS {MCT, MCP+I, MCSE, AER}, NetApp Filer/NetCache

www.meinlschmidt.com  www.maxwellrender.cz  www.lightgems.cz
===============================================================================

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