Rails - Jun 2007 - attachment_fu validation error

I have this class:

   class Logo < ActiveRecord::Base
     has_one :something

     has_attachment :content_type => :image,
                    :storage      => :db_file,
                    :max_size     => 500.kilobytes
                    :thumbnails   => {:web => ''150x100'',
:pdf =>
''150x100''},
                    :processor    => ''MiniMagick''

     validates_as_attachment
   end

OK, logos are working great in the application, resizing, storage,  
retrieval, ..., fine. But the validation of existing logos fails with  
(complete trace below)

   Logo.find(:first).valid?
   NameError: undefined local variable or method `full_filename'' for  
#<Logo:0x3561ed8>

And unfortunately that is triggered by something''s  
validates_associated if no logo is uploaded in its edition. I don''t  
see why valid? ends up calling set_size_from_temp_path, sizes were  
correctly computed and stored on creation:

   pp Logo.find(:first)
   #<Logo:0x35593f0
    @attributes     {"content_type"=>"image/jpeg",
      "size"=>"187697",
      "thumbnail"=>nil,
      "id"=>"1",
      "height"=>"768",
      "db_file_id"=>"3",
      "filename"=>"img_1651.jpeg",
      "parent_id"=>nil,
      "width"=>"1024"}>

This happens with all logos in the application, isn''t that  
suspicious? I''ve not diffed svn with the installed version but both  
CHANGELOGs start with

   * April 2, 2007 *

-- fxn

   Logo.find(:first).valid?
NameError: undefined local variable or method `full_filename'' for  
#<Logo:0x3561ed8>
         from ./script/../config/../config/../vendor/rails/ 
activerecord/lib/active_record/base.rb:1860:in `method_missing''
         from ./script/../config/../config/../vendor/plugins/ 
attachment_fu/lib/technoweenie/attachment_fu.rb:276:in `temp_paths''
         from ./script/../config/../config/../vendor/plugins/ 
attachment_fu/lib/technoweenie/attachment_fu.rb:270:in `temp_path''
         from ./script/../config/../config/../vendor/plugins/ 
attachment_fu/lib/technoweenie/attachment_fu.rb:236:in  
`save_attachment?''
         from ./script/../config/../config/../vendor/plugins/ 
attachment_fu/lib/technoweenie/attachment_fu.rb:339:in  
`set_size_from_temp_path''
         from ./script/../config/../config/../vendor/rails/ 
activerecord/lib/active_record/callbacks.rb:333:in `send''
         from ./script/../config/../config/../vendor/rails/ 
activerecord/lib/active_record/callbacks.rb:333:in `callback''
         from ./script/../config/../config/../vendor/rails/ 
activerecord/lib/active_record/callbacks.rb:330:in `each''
         from ./script/../config/../config/../vendor/rails/ 
activerecord/lib/active_record/callbacks.rb:330:in `callback''
         from ./script/../config/../config/../vendor/rails/ 
activerecord/lib/active_record/callbacks.rb:295:in `valid?''
         from (irb):16


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On Jun 29, 2007, at 8:33 PM, Xavier Noria wrote:
> validates_associated if no logo is uploaded in its edition. I
don''t
> see why valid? ends up calling set_size_from_temp_path, sizes were
> correctly computed and stored on creation:
I''ve seen something: that method is set as a before_validation,  
that''s why it gets called. Following the traces the plugin tries to  
determine whether the logo needs to be saved in save_attachment?  
which in the end results in a call to temp_paths

   def temp_paths
     @temp_paths ||= (new_record? || !File.exist?(full_filename)) ?  
[] : [copy_to_temp_file(full_filename)]
   end

full_filename is implemented by the file system and s3 backends, but  
it is missing in the database backend which is the one I am using. I  
don''t know enough about the plugin at this moment to propose a  
suitable fix, but at least I write a custom quick fix and go on with  
the project.

-- fxn


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