# Bug with serialized columns in console?

**URL:** <https://www.ruby-forum.com/t/bug-with-serialized-columns-in-console/142494>\
**Category:** Rails\
**Created:** [July 8, 2008, 3:31pm UTC](https://www.ruby-forum.com/t/bug-with-serialized-columns-in-console/142494 "2008-07-08T15:31:59Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![come](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/9f8e36/32.png) [@come](https://www.ruby-forum.com/u/come)\
**Post date:** [July 8, 2008, 3:31pm UTC](https://www.ruby-forum.com/t/bug-with-serialized-columns-in-console/142494/1 "2008-07-08T15:31:59Z")

</div>

Hi,

I recently added 2 serialized columns in my class Server :

class Server \< ActiveRecord::Base

serialize :visa, Hash  
serialize :appli, Array

…

No problem in my controller and my application and everything works as  
expected : Excel exports following the “visa” Hash or “appli” Array  
are ok.

But since I added the visa Hash, I can’t load the record with such a  
serialized column in the console window :

> > s=Server.find\_by\_nom “a\_server”  
> > ActiveRecord::SerializationTypeMismatch: visa was supposed to be a  
> > Hash, but was a String  
> > from D:/InstantRails-2.0-win/ruby/lib/ruby/gems/1.8/gems/  
> > activerecord-2.0.2/lib/active\_record/attribute\_methods.rb:244:i  
> > n `unserialize_attribute' from D:/InstantRails-2.0-win/ruby/lib/ruby/gems/1.8/gems/ activerecord-2.0.2/lib/active_record/attribute_methods.rb:216:i n`read\_attribute’  
> > from D:/InstantRails-2.0-win/ruby/lib/ruby/gems/1.8/gems/  
> > activerecord-2.0.2/lib/active\_record/base.rb:2152:in `attribute _for_inspect' from D:/InstantRails-2.0-win/ruby/lib/ruby/gems/1.8/gems/ activerecord-2.0.2/lib/active_record/base.rb:2229:in`inspect’  
> > from D:/InstantRails-2.0-win/ruby/lib/ruby/gems/1.8/gems/  
> > activerecord-2.0.2/lib/active\_record/base.rb:2227:in `collect' from D:/InstantRails-2.0-win/ruby/lib/ruby/gems/1.8/gems/ activerecord-2.0.2/lib/active_record/base.rb:2227:in`inspect’  
> > from D:/InstantRails-2.0-win/ruby/lib/ruby/1.8/irb.rb:298:in  
> > `output_value' from D:/InstantRails-2.0-win/ruby/lib/ruby/1.8/irb.rb:151:in`eval\_input’  
> > from D:/InstantRails-2.0-win/ruby/lib/ruby/1.8/irb.rb:259:in  
> > `signal_status' from D:/InstantRails-2.0-win/ruby/lib/ruby/1.8/irb.rb:147:in`eval\_input’  
> > from D:/InstantRails-2.0-win/ruby/lib/ruby/1.8/irb.rb:146:in  
> > `eval_input' from D:/InstantRails-2.0-win/ruby/lib/ruby/1.8/irb.rb:70:in`start’  
> > from D:/InstantRails-2.0-win/ruby/lib/ruby/1.8/irb.rb:69:in  
> > `catch' from D:/InstantRails-2.0-win/ruby/lib/ruby/1.8/irb.rb:69:in`start’  
> > from D:/InstantRails-2.0-win/ruby/bin/irb:13

Any Idea ? Is it a bug ?

Thanks a lot for your help.  
Come