class Admin::User < ActiveRecord::Base
  belongs_to :account
  store :settings, :accessors => [ :color, :homepage ]
  store_accessor :settings, :favorite_food
  store :preferences, :accessors => [ :remember_login ]
  store :json_data, :accessors => [ :height, :weight ], :coder => JSON
  store :json_data_empty, :accessors => [ :is_a_good_guy ], :coder => JSON

  def phone_number
    read_store_attribute(:settings, :phone_number).gsub(/(\d{3})(\d{3})(\d{4})/,'(\1) \2-\3')
  end

  def phone_number=(value)
    write_store_attribute(:settings, :phone_number, value && value.gsub(/[^\d]/,''))
  end
end

class Admin::User < ActiveRecord::Base
  class Coder
    def initialize(default = {})
      @default = default
    end

    def dump(o)
      ActiveSupport::JSON.encode(o || @default)
    end

    def load(s)
      s.present? ? ActiveSupport::JSON.decode(s) : @default.clone
    end
  end

  belongs_to :account
  store :settings, :accessors => [ :color, :homepage ]
  store_accessor :settings, :favorite_food
  store :preferences, :accessors => [ :remember_login ]
  store :json_data, :accessors => [ :height, :weight ], :coder => Coder.new
  store :json_data_empty, :accessors => [ :is_a_good_guy ], :coder => Coder.new

  def phone_number
    read_store_attribute(:settings, :phone_number).gsub(/(\d{3})(\d{3})(\d{4})/,'(\1) \2-\3')
  end

  def phone_number=(value)
    write_store_attribute(:settings, :phone_number, value && value.gsub(/[^\d]/,''))
  end
end

Remove warning by using a custom coder
Remove warning by using a custom coder

The native JSON library bypasses the `to_json` overrides in
active_support/core_ext/object/to_json.rb by calling its native
implementation directly. However `ActiveRecord::Store` uses a
HWIA so `JSON.dump` will call our `to_json` instead with a
`State` object for options rather than a `Hash`. This generates
a warning when the `:encoding`, `:only` & `:except` keys are
accessed in `Hash#as_json` because the `State` object delegates
unknown keys to `instance_variable_get` in its `:[]` method.

Workaround this warning in the test by using a custom coder that
calls `ActiveSupport::JSON.encode` directly.
