rob
2007-Jun-29 02:15 UTC
attachment_fu: Saving files with random filenames (using Digest::SHA1)
Hi all,
I''m creating an image uploader of sorts, and would like all of the
filenames of uploaded files to be completely random when saved. I am
fairly new to Ruby, Rails, and attachment_fu, and came up with the
following earliar:
require ''digest/sha1''
class Photo < ActiveRecord::Base
has_attachment :content_type => :image,
:storage => :file_system,
:processor => ''ImageScience'',
:path_prefix => ''public/photos'',
:thumbnails => { :thumb =>
''100x100>'' }
validates_as_attachment
def filename=(new_name)
new_name
"#{Digest::SHA1.hexdigest(Time.now.to_s)}#{File.extname(new_name)}"
write_attribute :filename, sanitize_filename(new_name)
end
end
This works, creating filenames such as
''4de12252220d679aa99b12be835ab56c7a5f7fc9.png'', but it
doesn''t set the
thumbnail name correctly (i.e:
4de12252220d679aa99b12be835ab56c7a5f7fc9_thumb.png) - instead, it
saves it with the same filename
(4de12252220d679aa99b12be835ab56c7a5f7fc9.png).
Does anyone have any ideas on how I can achieve this?
Thanks.
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rob
2007-Jun-29 16:20 UTC
Re: attachment_fu: Saving files with random filenames (using Digest::SHA1)
I figured out how to do it. Here''s the code for those who are interested. Seems to work perfect now and generates the thumbnail names how it should. http://pastie.caboo.se/74792 Rob On Jun 28, 10:15 pm, rob <r...-n9Q/XG8udXg@public.gmane.org> wrote:> Hi all, > > I''m creating an image uploader of sorts, and would like all of the > filenames of uploaded files to be completely random when saved. I am > fairly new to Ruby, Rails, and attachment_fu, and came up with the > following earliar: > > require ''digest/sha1'' > > class Photo < ActiveRecord::Base > has_attachment :content_type => :image, > :storage => :file_system, > :processor => ''ImageScience'', > :path_prefix => ''public/photos'', > :thumbnails => { :thumb => ''100x100>'' } > validates_as_attachment > > def filename=(new_name) > new_name > "#{Digest::SHA1.hexdigest(Time.now.to_s)}#{File.extname(new_name)}" > write_attribute :filename, sanitize_filename(new_name) > end > end > > This works, creating filenames such as > ''4de12252220d679aa99b12be835ab56c7a5f7fc9.png'', but it doesn''t set the > thumbnail name correctly (i.e: > 4de12252220d679aa99b12be835ab56c7a5f7fc9_thumb.png) - instead, it > saves it with the same filename > (4de12252220d679aa99b12be835ab56c7a5f7fc9.png). > > Does anyone have any ideas on how I can achieve this? > > Thanks.--~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
Andrew Stewart
2007-Jun-29 16:42 UTC
Re: attachment_fu: Saving files with random filenames (using Digest::SHA1)
Hello,> def filename=(new_name) > new_name > "#{Digest::SHA1.hexdigest(Time.now.to_s)}#{File.extname(new_name)}" > write_attribute :filename, sanitize_filename(new_name) > end > end > > This works, creating filenames such as > ''4de12252220d679aa99b12be835ab56c7a5f7fc9.png'', but it doesn''t set the > thumbnail name correctly (i.e: > 4de12252220d679aa99b12be835ab56c7a5f7fc9_thumb.png) - instead, it > saves it with the same filename > (4de12252220d679aa99b12be835ab56c7a5f7fc9.png).The problem is filename= is sometimes called with the filename of the full image and sometimes called with the thumbnail''s filename. The way to solve this is to change the filename right where it enters the system. Remove your filename= method and add this instead to your model: def uploaded_data=(file_data) return nil if file_data.nil? || file_data.size == 0 self.content_type = file_data.content_type self.filename = "#{Digest::SHA1.hexdigest(Time.now.to_s)}# {File.extname(file_data.original_filename)}" if respond_to?(:filename) if file_data.is_a?(StringIO) file_data.rewind self.temp_data = file_data.read else self.temp_path = file_data.path end end This is the same as the original implementation but for the third line in the method. Regards, Andy Stewart --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
Andrew Stewart
2007-Jun-29 16:45 UTC
Re: attachment_fu: Saving files with random filenames (using Digest::SHA1)
> I figured out how to do it. Here''s the code for those who are > interested. Seems to work perfect now and generates the thumbnail > names how it should. > > http://pastie.caboo.se/74792Aha! That''s the same solution I came up with -- but cleaner. Nice one. Regards, Andy Stewart --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---