Module: DefaultValueFor::ClassMethods

Defined in:
lib/default_value_for.rb

Instance Method Summary collapse

Instance Method Details

#default_value_for(attribute, options = {}, &block) ⇒ Object

Declares a default value for the given attribute.

Sets the default value to the given options parameter unless the given options equal { :value => … }

The options can be used to specify the following things:

  • value - Sets the default value.

  • allows_nil (default: true) - Sets explicitly passed nil values if option is set to true.



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# File 'lib/default_value_for.rb', line 58

def default_value_for(attribute, options = {}, &block)
  value = options.is_a?(Hash) && options.stringify_keys.has_key?('value') ? options.stringify_keys['value'] : options
  allows_nil = options.is_a?(Hash) && options.stringify_keys.has_key?('allows_nil') ? options.stringify_keys['allows_nil'] : true

  if !method_defined?(:set_default_values)
    include(InstanceMethods)

    after_initialize :set_default_values

    if respond_to?(:class_attribute)
      class_attribute :_default_attribute_values
      class_attribute :_default_attribute_values_not_allowing_nil
    else
      class_inheritable_accessor :_default_attribute_values
      class_inheritable_accessor :_default_attribute_values_not_allowing_nil
    end

    extend(DelayedClassMethods)
    init_hash = true
  else
    methods = singleton_methods(false)
    init_hash = !methods.include?("_default_attribute_values") && !methods.include?(:_default_attribute_values)
  end
  if init_hash
    self._default_attribute_values = ActiveSupport::OrderedHash.new
    self._default_attribute_values_not_allowing_nil = []
  end
  if block_given?
    container = BlockValueContainer.new(block)
  else
    container = NormalValueContainer.new(value)
  end
  _default_attribute_values[attribute.to_s] = container
  _default_attribute_values_not_allowing_nil << attribute.to_s unless allows_nil
end

#default_values(values) ⇒ Object 



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# File 'lib/default_value_for.rb', line 94

def default_values(values)
  values.each_pair do |key, options|
    options = options.stringify_keys if options.is_a?(Hash)

    value = options.is_a?(Hash) && options.has_key?('value') ? options['value'] : options

    if value.kind_of? Proc
      default_value_for(key, options.is_a?(Hash) ? options : {}, &value)
    else
      default_value_for(key, options)
    end
  end
end