Attachs

Json based attachments for records in rails.

Why

I did this gem to:

• Save attachments into one json column.
• Handle multiple attachments without the need of a separate model.
• Have a way to delete orphan files.
• Use graphicsmagick out of the box.
• Delete and rename attachments asynchronous.
• Keep renamed files to improve seo.

Install

Put this line in your Gemfile:

gem 'attachs'

Then bundle:

$ bundle

To install GraphicsMagick you can use homebrew:

$ brew install graphicsmagick

Configuration

Generate the configuration file:

$ bundle exec rails g attachs:install

Set the global settings:

Attachs.configure do |config|
  config.convert_options = '-strip -quality 82'
  config.region = 'us-east-1'
  config.bucket = 'some-bucket'
  config.base_url = 'https://cdn.mydomain.com'

  config.interpolation :name do |record|
    record.name
  end
end

Usage

Definitions

Add the columns to your tables:

class AddAttachments < ActiveRecord::Migration
  def change
    add_column :shops, :logo, :jsonb, default: {}
    add_column :products, :pictures, :jsonb, default: []
  end
end

Define the attachments in your models:

class Shop < ActiveRecord::Base
  has_attachment(
    :logo,
    path: ':id/:name.png',
    default_path: 'missing.png'
  )
end

class Product < ActiveRecord::Base
  has_attachments(
    :pictures,
    path: ':id/:style.:extension',
    styles: {
      tiny: '25x25',
      small: '150x150#',
      medium: '300x300!',
      large: '600x'
    }
  )
end

NOTE: The out of the box interpolations are: filename, basename, extension, attribute, content_type, size.

Validations

To validate the presence of the attachment:

class User < ActiveRecord::Base
  has_attachment :pictures
  validates_attachment_presence_of :pictures
end

To validate the size of the attachment:

class User < ActiveRecord::Base
  has_attachment :pictures
  validates_attachment_size_of :pictures, in: 1..5.megabytes
end

To validate the content type of the attachment:

class User < ActiveRecord::Base
  has_attachment :pictures
  validates_attachment_content_type_of :pictures, with: /\Aimage/
end

NOTE: Look into lib/attachs/locales yamls to known the keys.

Forms

Your forms continue to work the same:

<%= form_for @shop do |f| %>
  <%= f.file_field :logo %>
<% end %>

You can manage collections with fields_for:

<%= form_for @product do |f| %>
  <%= f.fields_for :pictures do |ff| %>
    <%= ff.file_field :value %>
    <%= ff.number_field :position %>
  <% end %>
<% end %>

Urls

The url method points to the original file:

<%= image_tag shop.logo.url %>

To point to some particular style:

<%= image_tag shop.logo.url(:small) %>

Tasks

To reprocess all styles:

$ bundle exec rake attachs:reprocess

To fix missing styles:

$ bundle exec rake attachs:fix_missings

To remove orphan files:

$ bundle exec rake attachs:clear

Contributing

Any issue, pull request, comment of any kind is more than welcome!

I will mainly ensure compatibility to PostgreSQL, AWS, Redis, Elasticsearch, FreeBSD and Memcached. 

Credits

This gem is maintained and funded by mmontossi.

License

It is free software, and may be redistributed under the terms specified in the MIT-LICENSE file.