# Problem to create thumbnails with Attachment FU + ImageScien

**URL:** <https://www.ruby-forum.com/t/problem-to-create-thumbnails-with-attachment-fu-imagescien/108747>\
**Category:** Rails\
**Created:** [July 6, 2007, 4:07pm UTC](https://www.ruby-forum.com/t/problem-to-create-thumbnails-with-attachment-fu-imagescien/108747 "2007-07-06T16:07:43Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![laurent](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/l/ce7236/32.png) [@laurent](https://www.ruby-forum.com/u/laurent)\
**Post date:** [July 6, 2007, 4:07pm UTC](https://www.ruby-forum.com/t/problem-to-create-thumbnails-with-attachment-fu-imagescien/108747/1 "2007-07-06T16:07:43Z")

</div>

Hello

I have a problem in the creation of a thumbnail for an uploaded image  
(with Attachment Fu)  
For resizing images, i’ve installed ImageScience, following steps of  
this article (on Mac 10.4.0 : freeimage installed with MacPort,  
ImageScience 1.1.3 gem installed (aith its dependencies), AttachmentFu  
plugin installed)

When resizing the image, i get the following error stack at the screen  
(and all messages of validations for my model class)

/usr/local/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/  
active\_record/validations.rb:764:in `save_without_transactions!' /usr/local/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/ active_record/transactions.rb:133:in`save!’  
/usr/local/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/  
active\_record/connection\_adapters/abstract/database\_statements.rb:  
59:in `transaction' /usr/local/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/ active_record/transactions.rb:95:in`transaction’  
/usr/local/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/  
active\_record/transactions.rb:121:in `transaction' /usr/local/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/ active_record/transactions.rb:133:in`save!’  
vendor/plugins/attachment\_fu/lib/technoweenie/attachment\_fu.rb:215:in  
`create_or_update_thumbnail' /usr/local/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/ active_support/core_ext/object/misc.rb:23:in`returning’  
vendor/plugins/attachment\_fu/lib/technoweenie/attachment\_fu.rb:207:in  
`create_or_update_thumbnail' vendor/plugins/attachment_fu/lib/technoweenie/attachment_fu.rb:367:in`after\_process\_attachment’  
vendor/plugins/attachment\_fu/lib/technoweenie/attachment\_fu.rb:367:in  
`each' vendor/plugins/attachment_fu/lib/technoweenie/attachment_fu.rb:367:in`after\_process\_attachment’  
/usr/local/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/  
active\_record/callbacks.rb:333:in `send' /usr/local/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/ active_record/callbacks.rb:333:in`callback’  
/usr/local/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/  
active\_record/callbacks.rb:330:in `each' /usr/local/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/ active_record/callbacks.rb:330:in`callback’  
/usr/local/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/  
active\_record/callbacks.rb:243:in `create_or_update' /usr/local/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/ active_record/base.rb:1545:in`save\_without\_validation’  
/usr/local/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/  
active\_record/validations.rb:752:in `save_without_transactions' /usr/local/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/ active_record/transactions.rb:129:in`save’  
/usr/local/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/  
active\_record/connection\_adapters/abstract/database\_statements.rb:  
59:in `transaction' /usr/local/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/ active_record/transactions.rb:95:in`transaction’  
/usr/local/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/  
active\_record/transactions.rb:121:in `transaction' /usr/local/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/ active_record/transactions.rb:129:in`save’  
app/controllers/player\_controller.rb:35:in `signup’

Has anyone already encountered this kind of error?

Regards

Laurent

---

<div class="post-metadata">

**Author:** ![laurent](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/l/ce7236/32.png) [@laurent](https://www.ruby-forum.com/u/laurent)\
**Post date:** [July 6, 2007, 4:10pm UTC](https://www.ruby-forum.com/t/problem-to-create-thumbnails-with-attachment-fu-imagescien/108747/2 "2007-07-06T16:10:43Z")

</div>

The article is [http://clarkware.com/cgi/blosxom/2007/02/24](http://clarkware.com/cgi/blosxom/2007/02/24)  
Mac OS X 10.4.10

Laurent