Skip to content

Instantly share code, notes, and snippets.

Embed
What would you like to do?
Configure Carrierwave for Amazon S3 Storage and Heroku
class Avatar < ActiveRecord::Base
mount_uploader :avatar_image, AvatarImageUploader # **must** specify class of uploader, otherwise base uploader is used, and no
# ...
end
class AvatarImageUploader < CarrierWave::Uploader::Base
include CarrierWave::MiniMagick
def store_dir
"uploads/#{model.class.to_s.underscore}/#{mounted_as}/#{model.id}"
end
version :print do
version :thumb { process :resize_to_fit => [32, 32] }
version :preview { process :resize_to_fit => [256, 256] }
version :full { process :resize_to_fit => [2048, 2048] }
end
version :web do
version :thumb { process :resize_to_fit => [32, 32] }
version :preview { process :resize_to_fit => [128, 128] }
version :full { process :resize_to_fit => [1024, 768] }
end
# ...
end
# config/initializers/carrierwave.rb
CarrierWave.configure do |config|
config.fog_credentials = {
# Configuration for Amazon S3 should be made available through an Environment variable.
# For local installations, export the env variable through the shell OR
# if using Passenger, set an Apache environment variable.
#
# In Heroku, follow http://devcenter.heroku.com/articles/config-vars
#
# $ heroku config:add S3_KEY=your_s3_access_key S3_SECRET=your_s3_secret S3_REGION=eu-west-1 S3_ASSET_URL=http://assets.example.com/ S3_BUCKET_NAME=s3_bucket/folder
# Configuration for Amazon S3
:provider => 'AWS',
:aws_access_key_id => ENV['S3_KEY'],
:aws_secret_access_key => ENV['S3_SECRET'],
:region => ENV['S3_REGION']
}
# For testing, upload files to local `tmp` folder.
if Rails.env.test? || Rails.env.cucumber?
config.storage = :file
config.enable_processing = false
config.root = "#{Rails.root}/tmp"
else
config.storage = :fog
end
config.cache_dir = "#{Rails.root}/tmp/uploads" # To let CarrierWave work on heroku
config.fog_directory = ENV['S3_BUCKET_NAME']
config.s3_access_policy = :public_read # Generate http:// urls. Defaults to :authenticated_read (https://)
config.fog_host = "#{ENV['S3_ASSET_URL']}/#{ENV['S3_BUCKET_NAME']}"
end
# ...
gem 'carrierwave'
gem 'fog', '~> 1.0.0' # Need to specify version, as carrierwave references older (0.9.0) which doesn't allow configuration of Rackspace UK Auth URL
<!-- Nested Versions -->
<%= image_tag avatar.avatar_image.url(:web, :preview) %>
<%= image_tag avatar.avatar_image.url(:print, :full) %>
<%= image_tag avatar.avatar_image.url(:web, :thumb) %>
@avishai

This comment has been minimized.

Copy link

commented Dec 14, 2011

This works great!

@kyleclegg

This comment has been minimized.

Copy link

commented Dec 29, 2012

This is great! I removed config.s3_access_policy and config.fog_host and it's working very well with fog 1.3.1.

@jpmoral

This comment has been minimized.

Copy link

commented Aug 11, 2013

Thanks. I needed to rename the initializer to config/initializers/fog.rb to get it to work.

@stevenabrooks

This comment has been minimized.

Copy link

commented Dec 23, 2013

What is the S3_ASSET_URL?

@davity

This comment has been minimized.

Copy link

commented Dec 27, 2013

S3_ASSET_URL is the address of the server where you're uploading your files. For example, if you have the next URL for a uploaded file (that you can get from your S3 console at file properties)

https://s3-eu-west-1.amazonaws.com/my_bucket_name/my_awesome_image.png

S3_ASSET_URL="https://s3-eu-west-1.amazonaws.com"
S3_BUCKET_NAME="my_bucket_name"

@shnikola

This comment has been minimized.

Copy link

commented Jan 3, 2014

config.s3_access_policy= is no longer available. To force http, you can use config.fog_use_ssl_for_aws = false

@heliocola

This comment has been minimized.

Copy link

commented Apr 14, 2014

config.fog_host= doesn't seems to be working.
This link was useful to me: https://github.com/carrierwaveuploader/carrierwave#using-amazon-s3

@nicollecastrog

This comment has been minimized.

Copy link

commented Apr 14, 2014

This gist totally saved me when I was stuck, thank you!!!!!

@grammakov

This comment has been minimized.

Copy link

commented Apr 15, 2014

awesome. It works great. Just don't forget to initialise fog.rb!

@mthees7

This comment has been minimized.

Copy link

commented Apr 29, 2014

@grammakov
initialise fog.rb? I'm stuck with some issue that I can't figure out, and I don't have a fog.rb file.

@vrybas

This comment has been minimized.

Copy link

commented May 4, 2014

The working configuration for me was

# config/initializers/fog.rb

CarrierWave.configure do |config|
  config.fog_credentials = {
    :provider              => 'AWS',
    :aws_access_key_id     => ENV['S3_KEY'],
    :aws_secret_access_key => ENV['S3_SECRET']
  }

  config.fog_directory =  ENV['S3_BUCKET_NAME']
  config.cache_dir     = "#{Rails.root}/tmp/uploads"   # For Heroku
end

config.region is not requried also

@futhr

This comment has been minimized.

Copy link

commented May 21, 2014

And to cleanup your after your specs, you can add this. The wiki example say CarrierWave::Uploader::Base.root but in this case it will wipe your tmp dir with pids and all.

# spec/support/carrierwave.rb

RSpec.configure do |config|

  # config.after(:all, :fog) do
  config.after(:all) do
    FileUtils.rm_rf CarrierWave::Uploader::Base.cache_dir
  end
end
@jackson-sandland

This comment has been minimized.

Copy link

commented Jun 18, 2014

One crucial component...where is the code that goes into the view to facilitate upload? Locally, you can add <% f.file_field :image %> and this creates an upload button that allows you to upload an image. What is the equivalent of that here?

@abatko

This comment has been minimized.

Copy link

commented Jun 24, 2014

@jackson-sandland I believe it is no different than the local approach:

<div class="form-group">
    <%= f.label :avatar %><br>
    <%= f.file_field :avatar, class: 'form-control' %>
    <%#= f.hidden_field :avatar_cache %>
</div>

Also, check out How to: Make Carrierwave work on Heroku and note the fact that making this work on Heroku by setting cache_dir to "#{Rails.root}/tmp/uploads" has the adverse side effect of making uploads not work across form redisplays.

Also, don't use f.hidden_field :avatar_cache as you will occasionally experience undefined method 'to_file' for CarrierWave when hosting on Heroku (due to the fact that each dyno has its own cache directory) - see carrierwaveuploader/carrierwave#725

@mundocalderon

This comment has been minimized.

Copy link

commented Aug 8, 2014

Is this MiniMagick specific? What would be the ImageMagick way of doing this?

  version :print do
    version :thumb    { process :resize_to_fit => [32, 32] }
    version :preview  { process :resize_to_fit => [256, 256] }
    version :full     { process :resize_to_fit => [2048, 2048] }
  end

  version :web do
    version :thumb    { process :resize_to_fit => [32, 32] }
    version :preview  { process :resize_to_fit => [128, 128] }
    version :full     { process :resize_to_fit => [1024, 768] }
  end
@psylinse

This comment has been minimized.

Copy link

commented Aug 11, 2014

@abatko do you how to get the functionality of :avatar_cache on heroku with multiple dynos?

@gabrielboeker

This comment has been minimized.

Copy link

commented May 15, 2018

an update would be nice since this documentation is over 7 years old. unfortunately i was not able to set up carrierwave with s3 correctly

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
You can’t perform that action at this time.