Method: ActiveRecord::StringEnum#str_enum

Defined in:
lib/active_record/string_enum.rb

#str_enum(definitions) ⇒ Object 



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# File 'lib/active_record/string_enum.rb', line 98

def str_enum(definitions)
  klass = self
  definitions.each do |name, values|
    # statuses = [ ]
    enum_values = values.map(&:to_s)
    name        = name.to_sym

    # def self.statuses statuses end
    detect_enum_conflict!(name, name.to_s.pluralize, true)
    klass.singleton_class.send(:define_method, name.to_s.pluralize) { values }

    detect_enum_conflict!(name, name)
    detect_enum_conflict!(name, "#{name}=")

    # TODO: in Rails 4.2.1 this will be legal:
    # attribute name, EnumType.new(name, enum_values)
    # instead of the next two lines:
    type = EnumType.new(name, enum_values)
    define_method("#{name}=") { |value| self[name] = type.cast(value) }

    _enum_methods_module.module_eval do
      enum_values.each do |value|
        # def active?() status == :active end
        klass.send(:detect_enum_conflict!, name, "#{value}?")
        define_method("#{value}?") { self[name] == value }

        # def active!() update! status: :active end
        klass.send(:detect_enum_conflict!, name, "#{value}!")
        define_method("#{value}!") { update! name => value }

        # scope :active, -> { where status: :active }
        klass.send(:detect_enum_conflict!, name, value, true)
        klass.scope value, -> { klass.where name => value }
      end
    end
    defined_str_enums[name.to_s] = enum_values
  end
end