PaperclipGoogledrive

This gem currently is supporting google-api-ruby-client (~> 0.11).

PaperclipGoogledrive is a gem that extends paperclip storage for Google Drive. Works with Rails 3.x.

Installation

Add this line to your application's Gemfile:

gem 'paperclip-googledrive'

And then execute:

$ bundle

Or install it yourself as:

$ gem install paperclip-googledrive

Google Drive Setup

Google Drive is a free service for file storage files. In order to use this storage you need a Google (or Google Apps) user which will own the files, and a Google API client.

Go to the Google Developers console and create a new project.
Go to "APIs & Auth > APIs" and enable "Drive API". If you are getting an "Access Not Configured" error while uploading files, this is due to this API not being enabled.
Go to "APIs & Auth > Credentials" and create a new OAuth 2.0 Client ID; select "service account key" type,
Now you can download the credentials in JSON.
Create a folder in which the files will be uploaded; note the folder's ID.
Set an environmental variable GOOGLE_APPLICATION_CREDENTIALS to be the JSON credentials. And GOOGLE_FOLDER_ID be the folder's ID.

Configuration

Example:

class Product < ActiveRecord::Base
 has_attached_file :photo,
    :storage => :google_drive,
    :google_drive_options => {
      :path => proc { |style| "#{style}_#{id}_#{avatar.original_filename}" },
      :public_folder_id => ENV["GOOGLE_FOLDER_ID"],
      :default_url => "avatar_missing.png"
    }
end

Options

The :google_drive_options option

This is a hash containing any of the following options:

:path – block, works similarly to Paperclip's :path option
:public_folder_id- id of folder that must be created in google drive and set public permissions on it
:default_url - an image in Public folder that used for attachments if attachment is not present

The :path option should be a block that returns a path that the uploaded file should be saved to. The block yields the attachment style and is executed in the scope of the model instance. For example:

class Product < ActiveRecord::Base
  has_attached_file :photo,
    :storage => :google_drive,
    :google_drive_credentials => "#{Rails.root}/config/google_drive.yml",
    :styles => { :medium => "300x300" },
    :google_drive_options => {
      :path => proc { |style| "#{style}_#{id}_#{photo.original_filename}" }
    }
end

For example, a new product is created with the ID of 14, and a some_photo.jpg as its photo. The following files would be saved to the Google Drive:

Public/14_some_photo.jpg Public/14_some_photo_medium.jpg

The another file is called some_photo_medium.jpg because style names (other than original) will always be appended to the filenames, for better management.