Module: ActsAsEnum::ClassMethods

Defined in:
lib/acts_as_enum.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.translate_enum_symbol(klass, attr_name, enum_symbol) ⇒ Object 



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# File 'lib/acts_as_enum.rb', line 135

def self.translate_enum_symbol(klass, attr_name, enum_symbol)
  ::I18n.t("activerecord.attributes.#{klass.to_s.underscore.gsub('/', '.')}.#{attr_name.to_s.pluralize}.#{enum_symbol}", default: enum_symbol.humanize)
end

Instance Method Details

#acts_as_enum(attr, options = { :in => [], :prefix => false }) ⇒ Object Also known as: enum_attr 



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# File 'lib/acts_as_enum.rb', line 56

def acts_as_enum(attr, options = { :in => [], :prefix => false })
  attr = attr.to_s
  plural_upcase_attr = attr.pluralize.upcase
  enum = options[:in]

  raise "Can not load Rails." unless defined?(Rails)
  raise "Options :in can not be empty." if enum.blank?
  raise "Options :in must be an object of Array or Hash." unless enum.is_a?(Array) or enum.is_a?(Hash)

  if enum.is_a?(Hash)
    enum = enum.to_a
  elsif enum.is_a?(Array) and enum.first.is_a?(String)
    enum = enum.inject([]) { |arr, obj| arr << [obj] * 2 }
  end

  attr_options = enum.each_with_object({}) do |arr, hash|
    if arr.count == 2
      hash[arr.last.to_s] = arr.last.to_s
    else
      hash[arr[-2]] = arr.last.to_s
    end
  end
  const_set(plural_upcase_attr, attr_options)

  enum.each do |arr|
    enum_name = arr.first.to_s.downcase
    attr_value = arr[-2]
    method_name = options[:prefix] ? "#{attr}_#{enum_name}" : enum_name

    const_set(method_name.upcase, attr_value)

    if Rails.version.to_i > 2
      scope method_name.to_sym, -> { where(attr => attr_value) }
    else
      named_scope method_name.to_sym, :conditions => { attr.to_sym => attr_value }
    end

    class_eval do
      define_method "#{method_name}?" do
        public_send(attr) == attr_value
      end

      define_method "#{method_name}!" do
        update_attribute(attr, attr_value) # use update_attribute method to skip validations

      end
    end
  end

  class_eval(%Q{
    def self.#{attr}_options
      #{plural_upcase_attr}.inject([]){ |arr, obj| arr << obj.reverse }
    end

    def self.#{attr}_options_i18n
      #{plural_upcase_attr}.inject([]) do |arr, obj|
        #{enum}.each do |a|
          obj[1] = ::ActsAsEnum::ClassMethods.translate_enum_symbol("#{self}", "#{attr}", a[0]) if a[1] == obj[0]
        end
        arr << obj.reverse
      end
    end

    def #{attr}_name
      return #{plural_upcase_attr}[#{attr}] if #{attr}.is_a?(FalseClass)
      #{plural_upcase_attr}[#{attr}] unless #{attr}.blank?
    end

    def #{attr}_name_i18n
      #{plural_upcase_attr}.each do |k, v|
        #{enum}.each do |a|
          #{plural_upcase_attr}[k] = ::ActsAsEnum::ClassMethods.translate_enum_symbol("#{self}", "#{attr}", a[0]) if a[1] == k
        end
      end
      return #{plural_upcase_attr}[#{attr}] if #{attr}.is_a?(FalseClass)
      #{plural_upcase_attr}[#{attr}] unless #{attr}.blank?
    end
  })
end