Using model attribute as :filename when using paperclip gem

Question

I'm getting an error when attempting to change the :filename of my paperclip attachment to equal an attribute on the class I'm attaching the paperclip file to.

When I use "#{self.company_name}" it errors out. Apparently in this scope, "self" is not Company. When I wrote this line I assumed that self is the instance of Company that I'm uploading this attachment to. Any idea how I can fix this? The Paperclip docs say to use ":filename" but I'd like to use the value of Company.company_name instead.

class Company < ActiveRecord::Base
  include AliasAttrs

  has_attached_file :company_logo, {

      :storage => :ftp,

      :path => "/logos/#{self.company_name}",

      :url => FTP_CONFIG[:access_host]+"logos/:filename",

      :ftp_servers => [
        {
          :host     => FTP_CONFIG[:host],
          :user     => FTP_CONFIG[:user],
          :password => FTP_CONFIG[:pass],
          :port     => 21 # optional, 21 by default
        }
      ]
  }
end

Update

I tried using the advice found in this post: https://robots.thoughtbot.com/paperclip-tips-and-updates

But now I am getting the following error when starting my server:

undefined method `interpolations' for Paperclip::Attachment:Class (NoMethodError)

Smooth · Accepted Answer · 2015-03-16 15:06:29Z

2

It looks like the syntax for interpolations has changed. Updated it and it worked. Add the following to your model or create a paperclip.rb file in config/initializers

  Paperclip.interpolates :company_name do |attachment, style|
    attachment.instance.company_name
  end

answered Mar 16, 2015 at 15:06

Smooth

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