I have a set of images on Amazon S3, and I'd like to automatically generate thumbnails for them to serve on my site.
I've considered Cloudinary, but it seems that I'd have to copy over all my images to Cloudinary servers first. I want to keep them on S3.
I've considered Dragonfly, but it seems that Dragonfly only works with files I'd upload after installing Dragonfly. I already have uploaded all my files.
What's a good solution for me? I'm in a Rails environment (rails 3.2).
Thanks!
If it's just a 'set of images' it's not really that well structured. You're better off reorganizing the way you store and manage images.
Try Paperclip.
class ModelName < ActiveRecord::Base
attr_accessible :image #more here
has_attached_file :image, :styles => { :large => "450x450>", :medium => "300x300>", :thumb => "150x150>" },
:storage => :s3,
:s3_credentials => "#{Rails.root}/config/s3.yml",
:path => "people/:style/:id/:filename",
:s3_protocol => "https"
def original_image_url
image.url
end
def large_image_url
image.url(:large)
end
def medium_image_url
image.url(:medium)
end
def small_image_url
image.url(:thumb)
end
#etc
end
Then simply do this to assign an existing image to an existing instance through the console:
require 'uri'
#instance.image = open(URI::encode(url))
#instance.save
# s3 will now contain the images in the appropriate sizes in the format specified above.
Since the original will also be saved, I'd advise to then delete the 'set of images' on s3 you started with, otherwise you'll be duplicating them.
I was wrong about Dragonfly. You can use Dragonfly on already-uploaded files. I'm using it on my project and it's working out great.
I have application which is deployed to heroku using amazon s3 posting images to buckets.This works perfectly fine. But when fetching same image it gives error:
Errno::ENOENT (No such file or directory showing path s3.amazonaws.com/bucket_name/app/public/messages/images/000/000/061/thumb/images.jpeg?1362410115)
Same path copying and pasting in browser's url doesn't work. If I am using bucket name as end point it works ie, with following path
/bucket_name.s3.amazonaws.com/app/public/messages/images/000/000/061/thumb/images.jpeg?1362410115.
But I dont know how to configure this url in my model. I am following heroku's way to configure aws-sdk.
https://devcenter.heroku.com/articles/paperclip-s3
Model has_attached_file seems like i am missing something here.For rest of configuration you can check above link.
has_attached_file :image, :styles => { :medium => "100x100>", :thumb => "100x100>" }
Thanks
Including given code in config/initializers/paper_clip.rb resolved my problem.
Paperclip::Attachment.default_options.merge!(
:url => ':s3_domain_url',
:path => 'app/public/:class/:attachment/:id_partition/:style/:filename'
)
When I create a user model the avatar.png file gets properly uploaded to S3 in the defined path. Problem is that, when I try to "read/download" the user.avatar.url it always gives the default path i.e. default avatar.
My user.rb has this:
attr_accessible :avatar
has_attached_file :avatar,
:storage => :s3,
:bucket => "/avatars",
:s3_credentials => {
:access_key_id => ENV['S3_KEY'],
:secret_access_key => ENV['S3_SECRET']
},
:path => "/avatars/:filename",
:default_url => "https://s3.amazonaws.com/avatars/default.png"
In my view I have:
user.avatar.url #<--- Which outputs https://s3.amazonaws.com/avatars/default.png
Any ideas how to get the right url and the right avatar (which does exists in S3)?
Or how to debug the attachment search path (i.e. the path where paperclip searches the file)?
The problem was that attachments file_name attribute didn't get saved and that was due to this line:
attr_accessor :avatar_file_name
Removing that line fixed the problem.
I'm using Paperclip and have a default_url option like this for one of my attachments:
:default_url => '/images/missing_:style.png'
The asset pipeline obviously doesn't like this since the directories moved. What's the best way to handle this? I have two styles for this picture (:mini and :thumb).
:default_url => ActionController::Base.helpers.asset_path('missing_:style.png')
Then put the default images in app/assets/images/
Tested only on Rails 4.
To make it work in production, we have to pass the name of an existing file to the asset_path helper. Passing a string containing a placeholder like "missing_:style.png" therefore doesn't work. I used a custom interpolation as a workaround:
# config/initializers/paperclip.rb
Paperclip.interpolates(:placeholder) do |attachment, style|
ActionController::Base.helpers.asset_path("missing_#{style}.png")
end
Note that you must not prefix the path with images/ even if your image is located in app/assets/images. Then use it like:
# app/models/some_model.rb
has_attached_file(:thumbnail,
:default_url => ':placeholder',
:styles => { ... })
Now default urls with correct digest hashes are played out in production.
The default_url option also takes a lambda, but I could not find a way to determine the requested style since interpolations are only applied to the result of the lambda.
Just make sure that in your views all your paperclip images are rendered with image_tag.
<%= image_tag my_model.attachment.url(:icon) %>
That way, all of paperclip's :crazy :symbol :interpolation will have happened to the url string before Rails tries to resolve it to an asset in the pipeline.
Also, make sure your :default_url is asset compatible...if missing_icon.png is at app/assets/images/missing_icon.png, then :default_url should be simply "missing_:style.png"
<%= image_tag my_model.attachment.url(:icon) %>
# resolves to...
<%= image_tag "missing_icon.png" %>
# which in development resolves to...
<img src="/assets/missing_icon.png">
I got the error(even for a single style) at assets:precompile with
:default_url => ActionController::Base.helpers.asset_path('missing.png')
So I hooked with a method like this
# supposing this is for avatar in User model
has_attached_file :avatar,
:styles => {..},
:default_url => lambda { |avatar| avatar.instance.set_default_url}
def set_default_url
ActionController::Base.helpers.asset_path('missing.png')
end
I didn't try for multiple styles, but this works for my situation.
this works for me:
has_attached_file :avatar, :styles => { :small => "52x52",
:medium => "200x200>", :large=> "300x300", :thumb => "100x100>" },
:default_url => "missing_:style.png"
just place images in your assets/images folder named: missing_large.png, missing_medium.png, missing_small.png and missing_thumb.png
In rails 4.0.0 and paperclip 4.1.1 this worked for me:
has_attached_file :avatar,
styles: { medium: '300x300#', small: '100x100#', thumb: '25x25#' },
default_url: ->(attachment) { 'avatar/:style.gif' },
convert_options: { all: '-set colorspace sRGB -strip' }
I ended up having to use something like the following.
DEFAULT_URL = "#{Rails.configuration.action_controller.asset_host}#{Rails.configuration.assets.prefix}/:attachment/:style/missing.png"
has_attached_file :art, :styles => { :large => "398x398#", :medium => "200x200#", :small=>"100x100#", :smaller=>"50x50#", :smallest=>"25x25"}, :path=>"images/:attachment/:id/:style/:basename.:extension", :default_url => DEFAULT_URL
I statically compile the assets and was getting an error in production, this helped me.
In your model file, change this line:
has_attached_file :avatar, styles: { medium: "300x300>", thumb: "100x100>" }, default_url: "/images/:style/missing.png"
by removing this:
/images/
Create a folder for each style, in this example medium and thumb, in assests/images and place an image called missing.png there (or whatever name you want it to have of course, as long as it matches the file name in the model)
Worked for me.
I've solved this problem by using a custom interpolator.
The problem from other solutions that suggest using
:default_url => ActionController::Base.helpers.asset_path('missing_:style.png')
is that you will get an error saying "missing_style.png" is not precompiled.
I created an initializer with the following code:
module Paperclip
module AssetPipeline
module Interpolator
def self.interpolate(pattern, *args)
ActionController::Base.helpers.asset_path Paperclip::Interpolations.interpolate(pattern, *args)
end
end
end
end
Then in my model I would do:
has_attached_file :image, interpolator: Paperclip::AssetPipeline::Interpolator, ...
Just remove the / from /images/pic.png: images/pic.png
I have a problem with the path. In my model I have following setup:
class Pdffiles < ActiveRecord::Base
belongs_to :user
has_attached_file :invoice_file,
:path => ":rails_root/public/pdffiles/:user_id/:style/:basename.:extension",
:url => "/pdffiles/:user_id/:style/:basename.:extension",
:storage => :s3,
:bucket => '...',
:s3_credentials => {
:access_key_id => '...',
:secret_access_key => '...'
}
end
and in a controller looks my action this:
pdf = Prawn::Document.new
pdf.move_down 70
pdf.text("Prawn Rocks")
pdf.render_file('prawn.pdf')
pdf_file = File.open('prawn.pdf')
pdff = Pdffile.new()
pdff.pdffile_file = pdf_file
pdff.user_id = todays_user.id
pdff.save
And my problem is, that this PDF file is stored to the S3 server, but on the bad place. Instead the directory app/public/pdff/id_of_a_user/file_name_of_pdf_file is the file saved to
Users/my_name/my_ruby_root_directory/name_of_my_project/public/pdffiles/id_of_a_user/file_name_of_pdf_file.
I am not totally sure, if I use the prawn for saving PDF files right, but I think the problem could be in the controller, where I have set up the place, where the created file have to be saved...
I would like to ask you, what I should change for saving PDF files into the right directory in S3... All helps will be appreciated!
Manny thanks, Sep
You could use something like CarrierWave ( https://github.com/jnicklas/carrierwave ) -- it makes uploading to S3 extremely easy with the FOG library https://github.com/jnicklas/carrierwave
The Users/my_name/my_ruby_root_directory/name_of_my_project/public portion of the path came from :rails_root/public portion of the path you configured in paperclip. So if you really want the s3 "directory" to be app/public/pdff/id_of_a_user/file_name_of_pdf_file you need to give paperclip the following path: app/public/pdffiles/:user_id/:style/:basename.:extension
Also, according to your model, you should use pdff.invoice_file = pdf_file instead of pdff.pdffile_file = pdf_file
I hope this helps.