Paperclip error when using Amazon S3

Question

I am migrating my application online with Heroku and Amazon AWS (S3) and encountered a weird error for my profilepic model.

This model manages the profile pic. It is made of 2 Paperclip attachments and a few other fields and depends to another model called Professionnel .

Here is the model :

class Profilepic < ApplicationRecord

  belongs_to :professionnel

  has_attached_file :image, styles: { original: "6000x6000", editable: "1200x1200", thumbnail: "400x400#"}
  validates_attachment :image, content_type: { content_type: ["image/jpeg", "image/gif", "image/png"] }, size: {less_than: 10.megabytes}

  has_attached_file :finalimage, styles: { medium: "500x500", small: "200x200"}, processors: [:cropper]

  attr_accessor :crop_x, :crop_y, :crop_w, :crop_h

end

First attachment :image is the image uploaded by the user. The second image (:finalimage) is a cropped image after Professionnel user has edited it (with cropper.js)

Everything is working perfectly locally

Though, when the image is uploaded the following bit of code is returning Paperclip::Errors::NotIdentifiedByImageMagickError

The bit of code that triggers this error is :

nouvelleppic.ratiolongdivlarg = Paperclip::Geometry.from_file(nouvelleppic.image.path(:original)).width / Paperclip::Geometry.from_file(nouvelleppic.image.path(:original)).height

In this bit of code, I am discovering the width/height ratio with help from Paperclip geometry functions.

Not sure what's wrong. It does work locally flawlessly and I am querying this AFTER the :image is successfully saved into my S3 bucket (I checked in S3 console)

I need this ratio to create the view that will allow user to crop the image and turn it into :finalimage. This is really funny it doesn't work when migrationg to Heroku / S3 as it is a simple geometry function from Paperclip. No problem uploading ...

EDIT EDIT

seems the problem is identified :

https://github.com/thoughtbot/paperclip/issues/2198

I just checked the Imagemagick version on my Heroku Cedar14 stack: 6.7.7-10 !!

Version: ImageMagick 6.7.7-10 2016-11-29 Q16 http://www.imagemagick.org

as suggested in the git thread above, is there a way to upgrade ImageMagick at Heroku ??

This thread How can I use the latest version of Imagemagick on Heroku? seems to suggest we can do that (second answer) ??

Answer 1

In response to your second question. The way you update Image Magic on heroku is by using a buildpack. Just like you have right now a Ruby buildpack you will have to add an Image Magic buildpack. Heroku has a dedicated page for Image Magic buildpacks:

https://elements.heroku.com/search/buildpacks?utf8=%E2%9C%93&q=imagemagick

This one (below) seems to be the most popular but feel free to browse around: https://elements.heroku.com/buildpacks/mcollina/heroku-buildpack-imagemagick