Class: DataMapper::Property::Enum

Inherits:
Integer
  • Object
show all
Includes:
Flags
Defined in:
lib/dm-types/enum.rb

Instance Method Summary collapse

Methods included from Flags

#custom?, included

Constructor Details

#initialize(model, name, options = {}) ⇒ Enum

Returns a new instance of Enum.



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# File 'lib/dm-types/enum.rb', line 10

def initialize(model, name, options = {})
  super

  @flag_map = {}

  flags = options.fetch(:flags, self.class.flags)
  flags.each_with_index do |flag, i|
    @flag_map[i + 1] = flag
  end

  if defined?(::DataMapper::Validations)
    unless model.skip_auto_validation_for?(self)
      if self.class.ancestors.include?(Property::Enum)
        allowed = flag_map.values_at(*flag_map.keys.sort)
        model.validates_within name, model.options_with_message({ :set => allowed }, self, :within)
      end
    end
  end
end

Instance Method Details

#dump(value) ⇒ Object 



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# File 'lib/dm-types/enum.rb', line 34

def dump(value)
  case value
  when ::Array then value.collect { |v| dump(v) }
  else              flag_map.invert[value]
  end
end

#load(value) ⇒ Object 



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# File 'lib/dm-types/enum.rb', line 30

def load(value)
  flag_map[value]
end

#typecast_to_primitive(value) ⇒ Object 



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# File 'lib/dm-types/enum.rb', line 41

def typecast_to_primitive(value)
  # Attempt to typecast using the class of the first item in the map.
  case flag_map[1]
  when ::Symbol then value.to_sym
  when ::String then value.to_s
  when ::Fixnum then value.to_i
  else               value
  end
end