Rails Admin

RailsAdmin introspects your models and gives you a working admin with no per-model
configuration.

What you get

• CRUD for every model it finds, immediately
• Search, filters and export
• A history of changes
• A configuration DSL for when the defaults are wrong

Mounting it

# Gemfile
gem "rails_admin"

# config/routes.rb
authenticate :user, ->(user) { user.admin? } do
  mount RailsAdmin::Engine => "/admin", as: "rails_admin"
end

The warning that comes with it

Zero configuration means it exposes everything by default, including models you did
not mean to expose. Gate the mount and configure visibility before this goes anywhere
near production.