Module: PriceHubble::Concern::Attributes::Enum

Extended by:
ActiveSupport::Concern
Included in:
PriceHubble::Concern::Attributes
Defined in:
lib/price_hubble/entity/concern/attributes/enum.rb

Overview

A separated enum typed attribute helper.

Class Method Summary collapse

Class Method Details

.typed_attr_enum(name, values:, **_args) ⇒ Object

Register a fixed enum attribute.

rubocop:disable Metrics/MethodLength – because of the inline meta

method definitions

Parameters:

  • name (Symbol, String) —

    the name of the attribute

  • values (Array<String, Symbol>) —

    the allowed values

  • _args (Hash{Symbol => Mixed}) —

    additional options



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# File 'lib/price_hubble/entity/concern/attributes/enum.rb', line 19

def typed_attr_enum(name, values:, **_args)
  values = values.map(&:to_sym)
  const_values = "ATTR_#{name.to_s.upcase}"

  class_eval "    # Define the constant for all valid values\n    \#{const_values} = \#{values}.freeze\n\n    def \#{name}=(value)\n      \#{name}_will_change!\n      value = value.to_sym\n\n      unless \#{const_values}.include? value\n        raise ArgumentError, \"'\\\#{value}' is not a valid \#{name} \" \\\n          \"(values: \\\#{\#{const_values}})\"\n      end\n\n      @\#{name} = value\n    end\n  RUBY\n\n  values.each do |value|\n    class_eval <<-RUBY, __FILE__, __LINE__ + 1\n      def \#{value}!\n        self.\#{name} = :\#{value}\n      end\n\n      def \#{value}?\n        self.\#{name} == :\#{value}\n      end\n    RUBY\n  end\nend\n", __FILE__, __LINE__ + 1