Restart file download when downloading file at boot

Question

I am new to rails. I am currently installing Paperclip for a model in Rails 3. When one of the form fields fails, it does not reload the loaded image again. It asks the user for new news. It does not look user friendly.

I would like to do two things to solve this problem. If all the fields are filled in correctly, I would like to save them in my application (in the system folder, as is usually done with paperclip). If the fields did not pass the test, you want to save the image in a separate folder temporarily until it is saved.

Am I going the right way? Else is there an easy way to do this?

Answer 1

Unfortunately, Paperclip only saves the downloaded file if you successfully save the model containing the file.

I believe that the easiest option is to perform client validation validation using javascript, so there is no need for a full configuration / hack.

Answer 2

I had to fix this in a recent project. This is a bit of hacks, but it works. I tried calling cache_images () using after_validation and before_save in the model, but it cannot be created for some reason that I cannot determine, so I just call it from the controller. Hope this helps someone else for a while!

Model:

class Shop < ActiveRecord::Base attr_accessor :logo_cache has_attached_file :logo def cache_images if logo.staged? if invalid? FileUtils.cp(logo.queued_for_write[:original].path, logo.path(:original)) @logo_cache = encrypt(logo.path(:original)) end else if @logo_cache.present? File.open(decrypt(@logo_cache)) {|f| assign_attributes(logo: f)} end end end private def decrypt(data) return '' unless data.present? cipher = build_cipher(:decrypt, 'mypassword') cipher.update(Base64.urlsafe_decode64(data).unpack('m')[0]) + cipher.final end def encrypt(data) return '' unless data.present? cipher = build_cipher(:encrypt, 'mypassword') Base64.urlsafe_encode64([cipher.update(data) + cipher.final].pack('m')) end def build_cipher(type, password) cipher = OpenSSL::Cipher::Cipher.new('DES-EDE3-CBC').send(type) cipher.pkcs5_keyivgen(password) cipher end end 

controller:

 def create @shop = Shop.new(shop_params) @shop.user = current_user @shop.cache_images if @shop.save redirect_to account_path, notice: 'Shop created!' else render :new end end def update @shop = current_user.shop @shop.assign_attributes(shop_params) @shop.cache_images if @shop.save redirect_to account_path, notice: 'Shop updated.' else render :edit end end 

View:

 = f.file_field :logo = f.hidden_field :logo_cache - if @shop.logo.file? %img{src: @shop.logo.url, alt: ''}