Ruby on Rails error – Missing Attribute: attribute_name – ActiveRecord::MissingAttributeError « Cowboy Coded

Ruby on Rails error – Missing Attribute: attribute_name – ActiveRecord::MissingAttributeError

ActiveRecord::MissingAttributeError in MyController#my_action
.....
missing attribute: my_attribute

So I got this error message today after I added a column to my database. WTF?? The column exists.. why can’t ActiveRecord see it? oh.. maybe because I am stupid. In my find command I was using the :select option

@widgets = Widget.find(:all, :select=>"id,name")

ActiveRecord can’t see any other attributes aside from what you specify in the :select option, so I just needed to add my attribute to the :select option

@widgets = Widget.find(:all, :select=>"id,name,my_attribute")

Tags: missingattributeerror, ruby on rails

This entry was posted on March 29, 2010, 6:49 pm. You can follow any responses to this entry through RSS 2.0. You can leave a response, or trackback from your own site.

2 Comments

#1 by Mike Blyth on September 26, 2010 - 12:29 pm

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Haven’t run into that error yet but it’s great to be aware of … you could probably spend a long time trying to figure it out if you didn’t know!
#2 by stz on January 13, 2011 - 1:05 pm

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Thank you for this post. I was exactly that stupid in this moment and this is the first helpful google result