Class: ActiveRecord::Base

Inherits:
Object
  • Object
show all
Defined in:
lib/spree_core/enumerable_constants.rb

Class Method Summary collapse

Class Method Details

.enumerable_constant(attribute_name, options = {}) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/spree_core/enumerable_constants.rb', line 146

def self.enumerable_constant(attribute_name, options={})
  raise ArgumentError, "you must specify a list of constants" unless options[:constants]
  set_name = attribute_name.to_s.camelize
  set_class = "#{self.name}::#{set_name}"

  constant_definitions = ""
  options[:constants].each do |constant|
    if constant.is_a? Hash
      # puts "hash"
      constant_name = constant.to_a[0][0]
      display_name = constant.to_a[0][1]
      # puts "constant name: #{constant_name}"
      # puts "display name: #{display_name}"
      # puts "c name: #{constant_name.to_s.underscore.upcase}"
      constant_definitions << "constant '#{constant_name.to_s.underscore.upcase}', nil, '#{display_name}'\n"
    else
      # puts "constant '#{constant.to_s.underscore.upcase}'\n"
      constant_definitions << "constant '#{constant.to_s.underscore.upcase}'\n"
    end
  end

  # allow for :connector and :skip_last_comma as used in Array#to_sentence
  if options[:connector]
    connector = options[:connector]
  else
    connector = 'or'
  end
  unless options[:skip_last_comma].kind_of? NilClass
    skip_last_comma = options[:skip_last_comma]
  else
    skip_last_comma = true
  end

  if options[:base]
    use_base = options[:base]
  else
    use_base = 1
  end

  # keep glue_text for back compat
  if options[:glue_text]
    connector = options[:glue_text].strip
  end

  class_eval <<-EOF
    class #{set_name} < EnumerableConstant::Base
      base #{use_base}
      #{constant_definitions}
    end
  EOF

  should_be_in_text = set_class.constantize.names.to_sentence :words_connector => connector, :last_word_connector => skip_last_comma

  unless options[:no_validation]
    class_eval <<-EOF
      validates :#{attribute_name.to_s}, :presence => {
        :in => #{set_name}::values,
        :message => "should be #{should_be_in_text}"
        }
    EOF
  end
end