Class: DataMapper::Property::Enum

Inherits:

Object

• Object
• DataMapper::Property::Enum

show all

Includes:

Flags

Defined in:

lib/dm-types/enum.rb

Instance Method Summary (collapse)

• - (Object) dump(value)
• - (Enum) initialize(model, name, options = {}) constructor

  A new instance of Enum.

• - (Object) load(value)
• - (Object) typecast(value)

Methods included from Flags

#custom?, included

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# File 'lib/dm-types/enum.rb', line 12

def initialize(model, name, options = {})
  @flag_map = {}

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

  if self.class.accepted_options.include?(:set) && !options.include?(:set)
    options[:set] = @flag_map.values_at(*@flag_map.keys.sort)
  end

  super
end

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# File 'lib/dm-types/enum.rb', line 31

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

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# File 'lib/dm-types/enum.rb', line 27

def load(value)
  flag_map[value]
end

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# File 'lib/dm-types/enum.rb', line 38

def typecast(value)
  return if value.nil?
  # 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