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Easy file attachment management for ActiveRecord

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Paperclip

Deprecated

Paperclip is deprecated.

For new projects, we recommend Rails' own ActiveStorage.

For existing projects, please consult and contribute to the migration guide, available in English, en español, and as a video recorded at RailsConf 2019.

Alternatively, for existing projects, Kreeti is maintaining kt-paperclip, an ongoing fork of Paperclip.

We will leave the Issues open as a discussion forum only. We do not guarantee a response from us in the Issues. All bug reports should go to kt-paperclip.

We are no longer accepting pull requests except pull requests against the migration guide. All other pull requests will be closed without merging.

Existing documentation

Documentation valid for
master
branch

Please check the documentation for the paperclip version you are using: https://github.com/thoughtbot/paperclip/releases


Build Status Dependency Status Code Climate Inline docs Security

Paperclip is intended as an easy file attachment library for ActiveRecord. The intent behind it was to keep setup as easy as possible and to treat files as much like other attributes as possible. This means they aren't saved to their final locations on disk, nor are they deleted if set to nil, until ActiveRecord::Base#save is called. It manages validations based on size and presence, if required. It can transform its assigned image into thumbnails if needed, and the prerequisites are as simple as installing ImageMagick (which, for most modern Unix-based systems, is as easy as installing the right packages). Attached files are saved to the filesystem and referenced in the browser by an easily understandable specification, which has sensible and useful defaults.

See the documentation for

has_attached_file
in
Paperclip::ClassMethods
for more detailed options.

The complete RDoc is online.


Requirements

Ruby and Rails

Paperclip now requires Ruby version >= 2.1 and Rails version >= 4.2 (only if you're going to use Paperclip with Ruby on Rails).

Image Processor

ImageMagick must be installed and Paperclip must have access to it. To ensure that it does, on your command line, run

which convert
(one of the ImageMagick utilities). This will give you the path where that utility is installed. For example, it might return
/usr/local/bin/convert
.

Then, in your environment config file, let Paperclip know to look there by adding that directory to its path.

In development mode, you might add this line to

config/environments/development.rb)
:
Paperclip.options[:command_path] = "/usr/local/bin/"

If you're on Mac OS X, you'll want to run the following with Homebrew:

brew install imagemagick

If you are dealing with pdf uploads or running the test suite, you'll also need to install GhostScript. On Mac OS X, you can also install that using Homebrew:

brew install gs

If you are on Ubuntu (or any Debian base Linux distribution), you'll want to run the following with apt-get:

sudo apt-get install imagemagick -y

file

The Unix

file
command is required for content-type checking. This utility isn't available in Windows, but comes bundled with Ruby Devkit, so Windows users must make sure that the devkit is installed and added to the system

PATH
.

Manual Installation

If you're using Windows 7+ as a development environment, you may need to install the

file.exe
application manually. The
file spoofing
system in Paperclip 4+ relies on this; if you don't have it working, you'll receive
Validation failed: Upload file has an extension that does not match its contents.
errors.

To manually install, you should perform the following:

Download & install

file
from this URL

To test, you can use the image below: untitled

Next, you need to integrate with your environment - preferably through the

PATH
variable, or by changing your
config/environments/development.rb
file

PATH

1. Click "Start"
2. On "Computer", right-click and select "Properties"
3. In Properties, select "Advanced System Settings"
4. Click the "Environment Variables" button
5. Locate the "PATH" var - at the end, add the path to your newly installed `file.exe` (typically `C:\Program Files (x86)\GnuWin32\bin`)
6. Restart any CMD shells you have open & see if it works

OR

Environment

1. Open `config/environments/development.rb`
2. Add the following line: `Paperclip.options[:command_path] = 'C:\Program Files (x86)\GnuWin32\bin'`
3. Restart your Rails server

Either of these methods will give your Rails setup access to the

file.exe
functionality, thus providing the ability to check the contents of a file (fixing the spoofing problem)

Installation

Paperclip is distributed as a gem, which is how it should be used in your app.

Include the gem in your Gemfile:

gem "paperclip", "~> 6.0.0"

Or, if you want to get the latest, you can get master from the main paperclip repository:

gem "paperclip", git: "git://github.com/thoughtbot/paperclip.git"

If you're trying to use features that don't seem to be in the latest released gem, but are mentioned in this README, then you probably need to specify the master branch if you want to use them. This README is probably ahead of the latest released version if you're reading it on GitHub.

For Non-Rails usage:

class ModuleName < ActiveRecord::Base
  include Paperclip::Glue
  ...
end

Quick Start

Models

class User < ActiveRecord::Base
  has_attached_file :avatar, styles: { medium: "300x300>", thumb: "100x100>" }, default_url: "/images/:style/missing.png"
  validates_attachment_content_type :avatar, content_type: /\Aimage\/.*\z/
end

Migrations

Assuming you have a

users
table, add an
avatar
column to the
users
table: ```ruby class AddAvatarColumnsToUsers < ActiveRecord::Migration def up add_attachment :users, :avatar end

def down remove_attachment :users, :avatar end end ```

(Or you can use the Rails migration generator:

rails generate paperclip user avatar
)

Edit and New Views

Make sure you have corresponding methods in your controller:

erb




Edit and New Views with Simple Form

Controller

def create
  @user = User.create(user_params)
end

private

Use strong_parameters for attribute whitelisting

Be sure to update your create() and update() controller methods.

def user_params params.require(:user).permit(:avatar) end

View Helpers

Add these to the view where you want your images displayed:

erb



Checking a File Exists

There are two methods for checking if a file exists:

  • file?
    and
    present?
    checks if the
    _file_name
    field is populated
  • exists?
    checks if the file exists (will perform a TCP connection if stored in the cloud)

Keep this in mind if you are checking if files are present in a loop. The first version is significantly more performant, but has different semantics.

Deleting an Attachment

Set the attribute to

nil
and save.
@user.avatar = nil
@user.save

Usage

The basics of Paperclip are quite simple: Declare that your model has an attachment with the

has_attached_file
method, and give it a name.

Paperclip will wrap up to four attributes (all prefixed with that attachment's name, so you can have multiple attachments per model if you wish) and give them a friendly front end. These attributes are:

  • _file_name
  • _file_size
  • _content_type
  • _updated_at

By default, only

_file_name
is required for Paperclip to operate. You'll need to add
_content_type
in case you want to use content type validation.

More information about the options passed to

has_attached_file
is available in the documentation of
Paperclip::ClassMethods
.

Validations

For validations, Paperclip introduces several validators to validate your attachment:

  • AttachmentContentTypeValidator
  • AttachmentPresenceValidator
  • AttachmentSizeValidator

Example Usage:

validates :avatar, attachment_presence: true
validates_with AttachmentPresenceValidator, attributes: :avatar
validates_with AttachmentSizeValidator, attributes: :avatar, less_than: 1.megabytes

Validators can also be defined using the old helper style:

  • validates_attachment_presence
  • validates_attachment_content_type
  • validates_attachment_size

Example Usage:

validates_attachment_presence :avatar

Lastly, you can also define multiple validations on a single attachment using

validates_attachment
:
validates_attachment :avatar, presence: true,
  content_type: "image/jpeg",
  size: { in: 0..10.kilobytes }

NOTE: Post-processing will not even start if the attachment is not valid according to the validations. Your callbacks and processors will only be called with valid attachments.

class Message < ActiveRecord::Base
  has_attached_file :asset, styles: { thumb: "100x100#" }

before_post_process :skip_for_audio

def skip_for_audio ! %w(audio/ogg application/ogg).include?(asset_content_type) end end

If you have other validations that depend on assignment order, the recommended course of action is to prevent the assignment of the attachment until afterwards, then assign manually:

class Book < ActiveRecord::Base
  has_attached_file :document, styles: { thumbnail: "60x60#" }
  validates_attachment :document, content_type: "application/pdf"
  validates_something_else # Other validations that conflict with Paperclip's
end

class BooksController < ApplicationController def create @book = Book.new(book_params) @book.document = params[:book][:document] @book.save respond_with @book end

private

def book_params params.require(:book).permit(:title, :author) end end

A note on content_type validations and security

You should ensure that you validate files to be only those MIME types you explicitly want to support. If you don't, you could be open to XSS attacks if a user uploads a file with a malicious HTML payload.

If you're only interested in images, restrict your allowed content_types to image-y ones:

validates_attachment :avatar,
  content_type: ["image/jpeg", "image/gif", "image/png"]

Paperclip::ContentTypeDetector
will attempt to match a file's extension to an inferred content_type, regardless of the actual contents of the file.

Internationalization (I18n)

For using or adding locale files in different languages, check the project https://github.com/thoughtbot/paperclip-i18n.

Security Validations

Thanks to a report from Egor Homakov we have taken steps to prevent people from spoofing Content-Types and getting data you weren't expecting onto your server.

NOTE: Starting at version 4.0.0, all attachments are required to include a contenttype validation, a filename validation, or to explicitly state that they're not going to have either. Paperclip will raise an error if you do not do this.

class ActiveRecord::Base
  has_attached_file :avatar
  # Validate content type
  validates_attachment_content_type :avatar, content_type: /\Aimage/
  # Validate filename
  validates_attachment_file_name :avatar, matches: [/png\z/, /jpe?g\z/]
  # Explicitly do not validate
  do_not_validate_attachment_file_type :avatar
end

This keeps Paperclip secure-by-default, and will prevent people trying to mess with your filesystem.

NOTE: Also starting at version 4.0.0, Paperclip has another validation that cannot be turned off. This validation will prevent content type spoofing. That is, uploading a PHP document (for example) as part of the EXIF tags of a well-formed JPEG. This check is limited to the media type (the first part of the MIME type, so, 'text' in

text/plain
). This will prevent HTML documents from being uploaded as JPEGs, but will not prevent GIFs from being uploaded with a
.jpg
extension. This validation will only add validation errors to the form. It will not cause errors to be raised.

This can sometimes cause false validation errors in applications that use custom file extensions. In these cases you may wish to add your custom extension to the list of content type mappings by creating

config/initializers/paperclip.rb
:
# Allow ".foo" as an extension for files with the MIME type "text/plain".
Paperclip.options[:content_type_mappings] = {
  foo: %w(text/plain)
}

Defaults

Global defaults for all your Paperclip attachments can be defined by changing the Paperclip::Attachment.defaultoptions Hash. This can be useful for setting your default storage settings per example so you won't have to define them in every `hasattached_file` definition.

If you're using Rails, you can define a Hash with default options in

config/application.rb
or in any of the
config/environments/*.rb
files on config.paperclipdefaults. These will get merged into `Paperclip::Attachment.defaultoptions` as your Rails app boots. An example:
module YourApp
  class Application < Rails::Application
    # Other code...

config.paperclip_defaults = { storage: :fog, fog_credentials: { provider: "Local", local_root: "#{Rails.root}/public"}, fog_directory: "", fog_host: "localhost"}

end end

Another option is to directly modify the

Paperclip::Attachment.default_options
Hash - this method works for non-Rails applications or is an option if you prefer to place the Paperclip default settings in an initializer.

An example Rails initializer would look something like this:

Paperclip::Attachment.default_options[:storage] = :fog
Paperclip::Attachment.default_options[:fog_credentials] = { provider: "Local", local_root: "#{Rails.root}/public"}
Paperclip::Attachment.default_options[:fog_directory] = ""
Paperclip::Attachment.default_options[:fog_host] = "http://localhost:3000"

Migrations

Paperclip defines several migration methods which can be used to create the necessary columns in your model. There are two types of helper methods to aid in this, as follows:

Add Attachment Column To A Table

The

attachment
helper can be used when creating a table:
class CreateUsersWithAttachments < ActiveRecord::Migration
  def up
    create_table :users do |t|
      t.attachment :avatar
    end
  end

This is assuming you are only using the users table for Paperclip attachment. Drop with care!

def down drop_table :users end end

You can also use the

change
method, instead of the
up
/
down
combination above, as shown below:
class CreateUsersWithAttachments < ActiveRecord::Migration
  def change
    create_table :users do |t|
      t.attachment :avatar
    end
  end
end

Schema Definition

Alternatively, the

add_attachment
and
remove_attachment
methods can be used to add new Paperclip columns to an existing table:
class AddAttachmentColumnsToUsers < ActiveRecord::Migration
  def up
    add_attachment :users, :avatar
  end

def down remove_attachment :users, :avatar end end

Or you can do this with the

change
method:
class AddAttachmentColumnsToUsers < ActiveRecord::Migration
  def change
    add_attachment :users, :avatar
  end
end

Vintage Syntax

Vintage syntax (such as

t.has_attached_file
and
drop_attached_file
) is still supported in Paperclip 3.x, but you're advised to update those migration files to use this new syntax.

Storage

Paperclip ships with 3 storage adapters:

  • File Storage
  • S3 Storage (via
    aws-sdk-s3
    )
  • Fog Storage

If you would like to use Paperclip with another storage, you can install these gems along side with Paperclip:

Understanding Storage

The files that are assigned as attachments are, by default, placed in the directory specified by the

:path
option to
has_attached_file
. By default, this location is
:rails_root/public/system/:class/:attachment/:id_partition/:style/:filename
. This location was chosen because, on standard Capistrano deployments, the
public/system
directory can be symlinked to the app's shared directory, meaning it survives between deployments. For example, using that
:path
, you may have a file at
/data/myapp/releases/20081229172410/public/system/users/avatar/000/000/013/small/my_pic.png

NOTE: This is a change from previous versions of Paperclip, but is overall a safer choice for the default file store.

You may also choose to store your files using Amazon's S3 service. To do so, include the

aws-sdk-s3
gem in your Gemfile:
gem 'aws-sdk-s3'

And then you can specify using S3 from

has_attached_file
. You can find more information about configuring and using S3 storage in the
Paperclip::Storage::S3
documentation
.

Files on the local filesystem (and in the Rails app's public directory) will be available to the internet at large. If you require access control, it's possible to place your files in a different location. You will need to change both the

:path
and
:url
options in order to make sure the files are unavailable to the public. Both
:path
and
:url
allow the same set of interpolated variables.

IO Adapters

When a file is uploaded or attached, it can be in one of a few different input forms, from Rails' UploadedFile object to a StringIO to a Tempfile or even a simple String that is a URL that points to an image.

Paperclip will accept, by default, many of these sources. It also is capable of handling even more with a little configuration. The IO Adapters that handle images from non-local sources are not enabled by default. They can be enabled by adding a line similar to the following into

config/initializers/paperclip.rb
:
Paperclip::DataUriAdapter.register

It's best to only enable a remote-loading adapter if you need it. Otherwise there's a chance that someone can gain insight into your internal network structure using it as a vector.

The following adapters are not loaded by default:

  • Paperclip::UriAdapter
    - which accepts a
    URI
    instance.
  • Paperclip::HttpUrlProxyAdapter
    - which accepts a
    http
    string.
  • Paperclip::DataUriAdapter
    - which accepts a Base64-encoded
    data:
    string.

Post Processing

Paperclip supports an extensible selection of post-processors. When you define a set of styles for an attachment, by default it is expected that those "styles" are actually "thumbnails." These are processed by

Paperclip::Thumbnail
. For backward compatibility reasons you can pass either a single geometry string, or an array containing a geometry and a format that the file will be converted to, like so:
has_attached_file :avatar, styles: { thumb: ["32x32#", :png] }

This will convert the "thumb" style to a 32x32 square in PNG format, regardless of what was uploaded. If the format is not specified, it is kept the same (e.g. JPGs will remain JPGs).

Paperclip::Thumbnail
uses ImageMagick to process images; ImageMagick's geometry documentation has more information on the accepted style formats.

For more fine-grained control of the conversion process,

source_file_options
and
convert_options
can be used to pass flags and settings directly to ImageMagick's powerful Convert tool, documented here. For example:
has_attached_file :image, styles: { regular: ['800x800>', :png]}, 
    source_file_options: { regular: "-density 96 -depth 8 -quality 85" },
    convert_options: { regular: "-posterize 3"}

ImageMagick supports a number of environment variables for controlling its resource limits. For example, you can enforce memory or execution time limits by setting the following variables in your application's process environment:

  • MAGICK_MEMORY_LIMIT=128MiB
  • MAGICK_MAP_LIMIT=64MiB
  • MAGICK_TIME_LIMIT=30

For a full list of variables and description, see ImageMagick's resources documentation.


Custom Attachment Processors

You can write your own custom attachment processors to carry out tasks like adding watermarks, compressing images, or encrypting files. Custom processors must be defined within the

Paperclip
module, inherit from
Paperclip::Processor
(see
lib/paperclip/processor.rb
), and implement a
make
method that returns a
File
. All files in your Rails app's
lib/paperclip
and
lib/paperclip_processors
directories will be automatically loaded by Paperclip. Processors are specified using the
:processors
option to
has_attached_file
:
has_attached_file :scan, styles: { text: { quality: :better } },
                         processors: [:ocr]

This would load the hypothetical class

Paperclip::Ocr
, and pass it the options hash
{ quality: :better }
, along with the uploaded file.

Multiple processors can be specified, and they will be invoked in the order they are defined in the

:processors
array. Each successive processor is given the result from the previous processor. All processors receive the same parameters, which are defined in the
:styles
hash. For example, assuming we had this definition:
has_attached_file :scan, styles: { text: { quality: :better } },
                         processors: [:rotator, :ocr]

Both the

:rotator
processor and the
:ocr
processor would receive the options
{ quality: :better }
. If a processor receives an option it doesn't recognise, it's expected to ignore it.

NOTE: Because processors operate by turning the original attachment into the styles, no processors will be run if there are no styles defined.

If you're interested in caching your thumbnail's width, height and size in the database, take a look at the paperclip-meta gem.

Also, if you're interested in generating the thumbnail on-the-fly, you might want to look into the attachmentonthe_fly gem.

Paperclip's thumbnail generator (see

lib/paperclip/thumbnail.rb
) is implemented as a processor, and may be a good reference for writing your own processors.


Events

Before and after the Post Processing step, Paperclip calls back to the model with a few callbacks, allowing the model to change or cancel the processing step. The callbacks are

before_post_process
and
after_post_process
(which are called before and after the processing of each attachment), and the attachment-specific
before__post_process
and
after__post_process
. The callbacks are intended to be as close to normal ActiveRecord callbacks as possible, so if you return false (specifically - returning nil is not the same) in a
before_filter
, the post processing step will halt. Returning false in an
after_filter
will not halt anything, but you can access the model and the attachment if necessary.

NOTE: Post processing will not even start if the attachment is not valid according to the validations. Your callbacks and processors will only be called with valid attachments.

class Message < ActiveRecord::Base
  has_attached_file :asset, styles: { thumb: "100x100#" }

before_post_process :skip_for_audio

def skip_for_audio ! %w(audio/ogg application/ogg).include?(asset_content_type) end end


URI Obfuscation

Paperclip has an interpolation called

:hash
for obfuscating filenames of publicly-available files.

Example Usage:

has_attached_file :avatar, {
    url: "/system/:hash.:extension",
    hash_secret: "longSecretString"
}

The

:hash
interpolation will be replaced with a unique hash made up of whatever is specified in
:hash_data
. The default value for
:hash_data
is
":class/:attachment/:id/:style/:updated_at"
.

:hash_secret
is required - an exception will be raised if
:hash
is used without
:hash_secret
present.

For more on this feature, read the author's own explanation

Checksum / Fingerprint

A checksum of the original file assigned will be placed in the model if it has an attribute named fingerprint. Following the user model migration example above, the migration would look like the following:

class AddAvatarFingerprintColumnToUser < ActiveRecord::Migration
  def up
    add_column :users, :avatar_fingerprint, :string
  end

def down remove_column :users, :avatar_fingerprint end end

The algorithm can be specified using a configuration option; it defaults to MD5 for backwards compatibility with Paperclip 5 and earlier.

has_attached_file :some_attachment, adapter_options: { hash_digest: Digest::SHA256 }

Run

CLASS=User ATTACHMENT=avatar rake paperclip:refresh:fingerprints
after changing the digest on existing attachments to update the fingerprints in the database.

File Preservation for Soft-Delete

An option is available to preserve attachments in order to play nicely with soft-deleted models. (actsasparanoid, paranoia, etc.)

has_attached_file :some_attachment, {
    preserve_files: true,
}

This will prevent

some_attachment
from being wiped out when the model gets destroyed, so it will still exist when the object is restored later.

Dynamic Configuration

Callable objects (lambdas, Procs) can be used in a number of places for dynamic configuration throughout Paperclip. This strategy exists in a number of components of the library but is most significant in the possibilities for allowing custom styles and processors to be applied for specific model instances, rather than applying defined styles and processors across all instances.

Dynamic Styles:

Imagine a user model that had different styles based on the role of the user. Perhaps some users are bosses (e.g. a User model instance responds to

#boss?
) and merit a bigger avatar thumbnail than regular users. The configuration to determine what style parameters are to be used based on the user role might look as follows where a boss will receive a
300x300
thumbnail otherwise a
100x100
thumbnail will be created.
class User < ActiveRecord::Base
  has_attached_file :avatar, styles: lambda { |attachment| { thumb: (attachment.instance.boss? ? "300x300>" : "100x100>") } }
end

Dynamic Processors:

Another contrived example is a user model that is aware of which file processors should be applied to it (beyond the implied

thumbnail
processor invoked when
:styles
are defined). Perhaps we have a watermark processor available and it is only used on the avatars of certain models. The configuration for this might be where the instance is queried for which processors should be applied to it. Presumably some users might return
[:thumbnail, :watermark]
for its processors, where a defined
watermark
processor is invoked after the
thumbnail
processor already defined by Paperclip.
class User < ActiveRecord::Base
  has_attached_file :avatar, processors: lambda { |instance| instance.processors }
  attr_accessor :processors
end

Logging

By default, Paperclip outputs logging according to your logger level. If you want to disable logging (e.g. during testing) add this into your environment's configuration:

ruby
Your::Application.configure do
...
  Paperclip.options[:log] = false
...
end

More information in the rdocs


Deployment

To make Capistrano symlink the

public/system
directory so that attachments survive new deployments, set the
linked_dirs
option in your
config/deploy.rb
file:
set :linked_dirs, fetch(:linked_dirs, []).push('public/system')

Attachment Styles

Paperclip is aware of new attachment styles you have added in previous deploys. The only thing you should do after each deployment is to call

rake paperclip:refresh:missing_styles
. It will store current attachment styles in
RAILS_ROOT/public/system/paperclip_attachments.yml
by default. You can change it by:
Paperclip.registered_attachments_styles_path = '/tmp/config/paperclip_attachments.yml'

Here is an example for Capistrano:

namespace :paperclip do
  desc "build missing paperclip styles"
  task :build_missing_styles do
    on roles(:app) do
      within release_path do
        with rails_env: fetch(:rails_env) do
          execute :rake, "paperclip:refresh:missing_styles"
        end
      end
    end
  end
end

after("deploy:compile_assets", "paperclip:build_missing_styles")

Now you don't have to remember to refresh thumbnails in production every time you add a new style. Unfortunately, it does not work with dynamic styles - it just ignores them.

If you already have a working app and don't want

rake paperclip:refresh:missing_styles
to refresh old pictures, you need to tell Paperclip about existing styles. Simply create a
paperclip_attachments.yml
file by hand. For example:
class User < ActiveRecord::Base
  has_attached_file :avatar, styles: { thumb: 'x100', croppable: '600x600>', big: '1000x1000>' }
end

class Book < ActiveRecord::Base has_attached_file :cover, styles: { small: 'x100', large: '1000x1000>' } has_attached_file :sample, styles: { thumb: 'x100' } end

Then in

RAILS_ROOT/public/system/paperclip_attachments.yml
:
---
:User:
  :avatar:
  - :thumb
  - :croppable
  - :big
:Book:
  :cover:
  - :small
  - :large
  :sample:
  - :thumb

Testing

Paperclip provides rspec-compatible matchers for testing attachments. See the documentation on Paperclip::Shoulda::Matchers for more information.

Parallel Tests

Because of the default

path
for Paperclip storage, if you try to run tests in parallel, you may find that files get overwritten because the same path is being calculated for them in each test process. While this fix works for parallel_tests, a similar concept should be used for any other mechanism for running tests concurrently.
if ENV['PARALLEL_TEST_GROUPS']
  Paperclip::Attachment.default_options[:path] = ":rails_root/public/system/:rails_env/#{ENV['TEST_ENV_NUMBER'].to_i}/:class/:attachment/:id_partition/:filename"
else
  Paperclip::Attachment.default_options[:path] = ":rails_root/public/system/:rails_env/:class/:attachment/:id_partition/:filename"
end

The important part here being the inclusion of

ENV['TEST_ENV_NUMBER']
, or a similar mechanism for whichever parallel testing library you use.

Integration Tests

Using integration tests with FactoryBot may save multiple copies of your test files within the app. To avoid this, specify a custom path in the

config/environments/test.rb
like so:
Paperclip::Attachment.default_options[:path] = "#{Rails.root}/spec/test_files/:class/:id_partition/:style.:extension"

Then, make sure to delete that directory after the test suite runs by adding this to

spec_helper.rb
.
config.after(:suite) do
  FileUtils.rm_rf(Dir["#{Rails.root}/spec/test_files/"])
end

Example of test configuration with Factory Bot

FactoryBot.define do
  factory :user do
    avatar { File.new("#{Rails.root}/spec/support/fixtures/image.jpg") }
  end
end

Contributing

If you'd like to contribute a feature or bugfix: Thanks! To make sure your fix/feature has a high chance of being included, please read the following guidelines:

  1. Post a pull request.
  2. Make sure there are tests! We will not accept any patch that is not tested. It's a rare time when explicit tests aren't needed. If you have questions about writing tests for paperclip, please open a GitHub issue.

Please see

CONTRIBUTING.md
for more details on contributing and running test.

Thank you to all the contributors!

License

Paperclip is Copyright © 2008-2017 thoughtbot, inc. It is free software, and may be redistributed under the terms specified in the MIT-LICENSE file.

About thoughtbot

thoughtbot

Paperclip is maintained and funded by thoughtbot. The names and logos for thoughtbot are trademarks of thoughtbot, inc.

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