Module: ActiveRecord::EnumeratedModel::ClassMethods

Defined in:
lib/active_record-enumerated_model/enumerated_model.rb

Instance Method Summary collapse

Instance Method Details

#bypass_readonly(&block) ⇒ Object 



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# File 'lib/active_record-enumerated_model/enumerated_model.rb', line 45

def bypass_readonly(&block)
  ActiveRecord::ReadonlyModel.bypass do
    yield
  end
  # regenerate constants
  create_enumeration_constants(@enumeration_attribute, :force => true)
end

#clear_existing_constants ⇒ Object 



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# File 'lib/active_record-enumerated_model/enumerated_model.rb', line 35

def clear_existing_constants
  unless @enumerated_constants.blank?
    @enumerated_constants.each do |existing_constant|
      if self.const_defined?(existing_constant)
        self.send(:remove_const, existing_constant)
      end
    end
  end
end

#create_enumeration_constants(enumeration_attribute = :name, options = {:force => false}) ⇒ Object 



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# File 'lib/active_record-enumerated_model/enumerated_model.rb', line 8

def create_enumeration_constants(enumeration_attribute = :name, options = {:force => false})
  @enumeration_attribute = enumeration_attribute
  @enumerated_constants = [] if @enumerated_constants.blank?
  clear_existing_constants if options[:force]
  attribute = enumeration_attribute.to_s

  self.all.each do |instance|
    unless instance.attributes.include?(attribute)
      raise UnknownAttributeError.new("Tried to create constants on the #{attribute} attribute, but it doesn't exist on this model")
    end
    value = instance.attributes[attribute]
    if value.blank?
      raise NilConstantError.new("Encountered a nil value on the #{attribute} attribute and can't create a constant")
    end
    const = ActiveRecord::EnumeratedModel.constant_friendly_string(value)
    if self.const_defined?(const)
      if options[:force]
        self.send(:remove_const, const)
      else
        raise RuntimeError.new("Constant #{self.to_s}::#{const} has already been defined")
      end
    end
    self.const_set(const, instance)
    @enumerated_constants << const
  end
end