Enable use of ActiveSupport::StringInquirer as an ActiveRecord::Serialization coder

[laserlemon]

The purpose of this is to allow ActiveSupport::StringInquirer to be used alongside ActiveRecord's serialize method, like so:

class Car < ActiveRecord::Base
  serialize :color, ActiveSupport::StringInquirer
end

car = Car.create(color: "red")
car.color.red? # => true

Because this straddles the line between ActiveSupport and ActiveRecord, I wasn't exactly sure of the proper place for this, so I'm certainly willing to move it around if need be.

[drogus]

@laserlemon thanks for the patch, but if we merge this, we will need to also accept pull requests with dump and load methods added to a lot of the other classes as well. If you need to serialize classes that do not support it by default, please just make a subclass and implement needed methods there.

[laserlemon]

Bummer. Thank you for the consideration anyway!

[drogus]

@laserlemon btw, I would do it like this:

def color
  value = super
  ActiveSupport::StringInquirer.new(value) if value
end

But I guess it's a matter of taste.

[laserlemon]

@drogus Thank you. Yes, that's how I've done it in the past.