Active Storage and its adapters and plugins

Active Storage is a relatively new addition to Ruby on Rails (added in 5.2). This library aims to satisfy your needs regarding file uploads.

With Active Storage, enhancing a model with a file-backed attribute is as simple as adding a single line of code:

class Post < ApplicationRecord  has_one_attached :image
end

Then, you can attach a file to a record by simply passing it along with other attributes:

# Now you can create a post with an imageimage = File.open("example.png")
post = Post.create!(title: "Test")
post.image.attach(io: image, filename: "example.png")
# Use a variant of the image somewhere in a template
<%= image_tag post.image.variant(resize: "400x300") %>

From an architectural point of view, Active Storage can be divided into four components:

• Uploading and serving files (controllers, helpers, and client libraries)
• Active Record integration (has_one_attached...