Paperclip renaming files after they're saved - Printable Version +- 0Day Forums (https://0day.red) +-- Forum: Coding (https://0day.red/Forum-Coding) +--- Forum: Ruby (https://0day.red/Forum-Ruby) +--- Thread: Paperclip renaming files after they're saved (/Thread-Paperclip-renaming-files-after-they-39-re-saved) |
Paperclip renaming files after they're saved - migration297850 - 07-18-2023 How do I rename a file after is has been uploaded and saved? My problem is that I need to parse information about the files automatically in order to come up with the file name the file should be saved as with my application, but I can't access the information required to generate the file name till the record for the model has been saved. RE: Paperclip renaming files after they're saved - raea - 07-18-2023 Another option is set to default, work for all upload. This example change name file to 'name default' for web, example: `test áé.jpg` to `test_ae.jpg` **helper/application_helper.rb** def sanitize_filename(filename) fn = filename.split /(?<=.)\.(?=[^.])(?!.*\.[^.])/m fn[0] = fn[0].parameterize return fn.join '.' end Create **config/initializers/paperclip_defaults.rb** include ApplicationHelper Paperclip::Attachment.default_options.update({ :path => ":rails_root/public/system/:class/:attachment/:id/:style/:parameterize_file_name", :url => "/system/:class/:attachment/:id/:style/:parameterize_file_name", }) Paperclip.interpolates :parameterize_file_name do |attachment, style| sanitize_filename(attachment.original_filename) end Need restart, after put this code RE: Paperclip renaming files after they're saved - palpebral910289 - 07-18-2023 The following migration solved the problem to me. **Renaming `avatar` to `photo`**: class RenamePhotoColumnFromUsers < ActiveRecord::Migration def up add_attachment :users, :photo # Add `avatar` method (from Paperclip) temporarily, because it has been deleted from the model User.has_attached_file :avatar, styles: { medium: '300x300#', thumb: '100x100#' } User.validates_attachment_content_type :avatar, content_type: %r{\Aimage\/.*\Z} # Copy `avatar` attachment to `photo` in S3, then delete `avatar` User.where.not(avatar_file_name: nil).each do |user| say "Updating #{user.email}..." user.update photo: user.avatar user.update avatar: nil end remove_attachment :users, :avatar end def down raise ActiveRecord::IrreversibleMigration end end Hope it helps :) RE: Paperclip renaming files after they're saved - Sirhendrikatkg - 07-18-2023 I'd like to donate my "safe move" solution that doesn't rely on any private API and protects against data loss due to network failure: First, we get the old and new paths for every style: styles = file.styles.keys+[:original] old_style2key = Hash[ styles.collect{|s| [s,file.path(s).sub(%r{\A/},'')]} ] self.file_file_name = new_filename new_style2key = Hash[ styles.collect{|s| [s,file.path(s).sub(%r{\A/},'')]} ] Then, we copy every file to it's new path. Since the default path includes both object ID and filename, this can never collide with the path for a different file. But this will fail if we try to rename without changing the name: styles.each do |style| raise "same key" if old_style2key[style] == new_style2key[style] file.s3_bucket.objects[old_style2key[style]].copy_to(new_style2key[style]) end Now we apply the updated model to the DB: save! It is important to do this after we create the new S3 objects but before we delete the old S3 objects. Most of the other solutions in this thread can lead to a loss of data if the database update fails (e.g. network split with bad timing), because then the file would be at a new S3 location but the DB still points to the old location. That's why my solution doesn't delete the old S3 objects until after the DB update succeeded: styles.each do |style| file.s3_bucket.objects[old_style2key[style]].delete end Just like with the copy, there's no chance that we accidentally delete another database object's data, because the object ID is included in the path. So unless you rename the same database object A->B and B->A at the same time (e.g. 2 threads), this delete will always be safe. RE: Paperclip renaming files after they're saved - inroad247273 - 07-19-2023 My avatar images are named with the user slug, if they change their names I have to rename images too. That's how I rename my avatar images using S3 and paperclip. class User < ActiveRecord::Base after_update :rename_attached_files_if_needed has_attached_file :avatar_image, :storage => :s3, :s3_credentials => "#{Rails.root}/config/s3.yml", :path => "/users/:id/:style/:slug.:extension", :default_url => "/images/users_default.gif", :styles => { mini: "50x50>", normal: "100x100>", bigger: "150x150>" } def slug return name.parameterize if name "unknown" end def rename_attached_files_if_needed return if !name_changed? || avatar_image_updated_at_changed? (avatar_image.styles.keys+[:original]).each do |style| extension = Paperclip::Interpolations.extension(self.avatar_image, style) old_path = "users/#{id}/#{style}/#{name_was.parameterize}#{extension}" new_path = "users/#{id}/#{style}/#{name.parameterize}#{extension}" avatar_image.s3_bucket.objects[old_path].move_to new_path, acl: :public_read end end end RE: Paperclip renaming files after they're saved - allixirthv - 07-19-2023 To add to @Fotios's answer: its the best way I think to make custom file name, but in case you want file name based on md5 you can use fingerprint which is already available in Paperclip. All you have to do is to put this to config/initializers/paperclip_defaults.rb Paperclip::Attachment.default_options.update({ # :url=>"/system/:class/:attachment/:id_partition/:style/:filename" :url=>"/system/:class/:attachment/:style/:fingerprint.:extension" }) There's no need to set :path here as by default it's made that way: :path=>":rails_root/public:url" I didn't check if it's necessary but in case it doesn't work for you make sure your model is able to save fingerprints in the database -> [here][1] One more tip which I find handy is to use rails console to check how it works: $ rails c --sandbox > Paperclip::Attachment.default_options .. > s = User.create(:avatar => File.open('/foo/bar.jpg', 'rb')) .. > s.avatar.path => "/home/groovy_user/rails_projectes/funky_app/public/system/users/avatars/original/49332b697a83d53d3f3b5bebce7548ea.jpg" > s.avatar.url => "/system/users/avatars/original/49332b697a83d53d3f3b5bebce7548ea.jpg?1387099146" [1]: [To see links please register here] RE: Paperclip renaming files after they're saved - sandelt - 07-19-2023 To add to @Voyta's answer, if you're using S3 with paperclip: (record.image.styles.keys+[:original]).each do |style| AWS::S3::S3Object.move_to record.image.path(style), new_file_path, record.image.bucket_name end record.update_attribute(:image_file_name, new_file_name) RE: Paperclip renaming files after they're saved - lloydu - 07-19-2023 And to add yet another answer, here is the full method I'm using for S3 renaming : def rename(key, new_name) file_name = (key.to_s+"_file_name").to_sym old_name = self.send(file_name) (self.send(key).styles.keys+[:original]).each do |style| path = self.send(key).path(style) self[file_name] = new_name new_path = self.send(key).path(style) new_path[0] = "" self[file_name] = old_name old_obj = self.send(key).s3_object(style.to_sym) new_obj = old_obj.move_to(new_path) end self.update_attribute(file_name, new_name) end To use : Model.find(#).rename(:avatar, "test.jpg") RE: Paperclip renaming files after they're saved - rechecking813495 - 07-19-2023 Have you checked out [paperclip interpolations][1]? If it is something that you can figure out in the controller (before it gets saved), you can use a combination of the controller, model, and interpolation to solve your problem. I have this example where I want to name a file based on it's MD5 hash. In my controller I have: params[:upload][:md5] = Digest::MD5.file(file.path).hexdigest I then have a `config/initializers/paperclip.rb` with: Paperclip.interpolates :md5 do|attachment,style| attachment.instance.md5 end Finally, in my model I have: validates_attachment_presence :upload has_attached_file :upload, :path => ':rails_root/public/files/:md5.:extension', :url => '/files/:md5.:extension' [1]: [To see links please register here] RE: Paperclip renaming files after they're saved - howler398301 - 07-19-2023 If, for example, your model has attribute image: has_attached_file :image, :styles => { ...... } By default papepclip files are stored in /system/:attachment/:id/:style/:filename. So, You can accomplish it by renaming every style and then changing image_file_name column in database. (record.image.styles.keys+[:original]).each do |style| path = record.image.path(style) FileUtils.move(path, File.join(File.dirname(path), new_file_name)) end record.image_file_name = new_file_name record.save |