arms_foos_preferences_example.rb

# Setup

require 'active_record'
require 'arms'

ActiveRecord::Base.establish_connection(
  :adapter => "sqlite3",
  :database  => "foos.sqlite3"
)
ActiveRecord::Schema.define do
  create_table :foos do |table|
    table.column :preferences, :string
  end
end

class Foo < ActiveRecord::Base
  arms_serialize :preferences, :indifferent_hashes, ::JSON
end

# Runtime

Foo.create!(preferences: {favorite_animal: 'ocelot'})

foo = Foo.last

puts foo.preferences_before_type_cast

puts foo.preferences[:favorite_animal]
puts foo.preferences['favorite_animal']