Module: Genderize::ClassMethods

Defined in:
lib/genderize.rb

Instance Method Summary collapse

Instance Method Details

#genderize(col_name = "gender") ⇒ Object 



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# File 'lib/genderize.rb', line 17

def genderize(col_name = "gender")
  # Reads the DB column value for gender attribute and creates a new Gender
  # object with it's value
  #
  # The object is memoized for future calls.
  #
  # Returns a Gender
  define_method col_name do
    current_value = instance_variable_get("@#{col_name}")
    persist_value = Genderize::Gender.new(read_attribute(col_name))
    return current_value || instance_variable_set("@#{col_name}", persist_value)
  end

  # Writes to the DB column the new value for the gender attribute
  # Sets the instance varaible value too
  #
  # string - A String indicating the gender. Must be either 'm', "M", 'f' or "F".
  #
  # Raises ArgumentError if gender is not a single alphanumeric character "m" or "f"
  define_method "#{col_name}=" do |string|
    string = string.to_s.first
    unless string.to_s =~ /\A(m|f|)\Z/i
      raise ArgumentError, "Gender must be one of '', 'm', or 'f'"
    end
    write_attribute(col_name, string)

    if string.blank?
      instance_variable_set("@#{col_name}", string)
    else
      instance_variable_set("@#{col_name}", Genderize::Gender.new(read_attribute(col_name)))
    end
  end

end