Class: Sinclair::Settable::Caster

Inherits:

Caster

• Object
• Caster
• Sinclair::Settable::Caster

Defined in:

lib/sinclair/settable/caster.rb

Overview

Class responsible for casting the values

New types can be added

Examples:

Adding a casting type to Sinclair::Settable::Caster

class Sinclair
  module Settable
    class Caster
      cast_with(:squared) { |value| value.to_f**2 }
    end
  end
end

class MathEnvSettings
  extend Sinclair::EnvSettable

  settings_prefix 'MATH'

  setting_with_options :value, type: :squared
end

ENV['MATH_VALUE'] = '80'

settable.value # returns 6400.0

Creating a new caster

module JsonEnvSettable
  include Sinclair::EnvSettable
  extend Sinclair::Settable::ClassMethods

  class Caster < Sinclair::Settable::Caster
    cast_with(:json) { |value| JSON.parse(value) }
  end
end

class JsonEnvSettings
  extend JsonEnvSettable

  settings_prefix 'JSON'

  setting_with_options :config, type: :json
end

hash = { key: 'value' }

ENV['JSON_CONFIG'] = hash.to_json

settable.config # returns { 'key' => 'value' }

Method Summary

Methods inherited from Caster

cast, #cast, cast_with, caster_for, #initialize, master_caster!

Methods included from Caster::ClassMethods

#cast, #cast_with, #caster_for, #master_caster!

Constructor Details

This class inherits a constructor from Sinclair::Caster