Module: ActAsAttributes::ClassMethods

Defined in:
lib/act_as_attribute.rb

Instance Method Summary collapse

Instance Method Details

#act_as_attribute(model_name, model_attr_as_key = "name", model_attr_as_value = "value") ⇒ Object 



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# File 'lib/act_as_attribute.rb', line 27

def act_as_attribute(model_name, model_attr_as_key= "name", model_attr_as_value="value")

  get_constants

  self::AVAILABLE_ATTRIBUTES.each do |attr|
    if method_available_as_attribute?(attr)
      deal_with_duplicate_method(attr)
    end

    define_method(attr.underscore) do
      available_objects = self.send(model_name)
      if available_objects.map(&model_attr_as_key.to_sym).include? attr
        available_objects.send("find_by_#{model_attr_as_key}", attr).send(model_attr_as_value)
      else
        new_object = model_name.to_s.classify.constantize.create(model_attr_as_key.to_sym => attr)
        available_objects << new_object
        new_object.send(model_attr_as_value)
      end
    end

    define_method("#{attr.underscore}=") do |value|
      available_objects = self.send(model_name)
      if available_objects.map(&model_attr_as_key.to_sym).include? attr
        new_association= available_objects.send("find_by_#{model_attr_as_key}", attr)
        new_association.send("#{model_attr_as_value.to_s}=", value)
        new_association.save
      else
        new_object = model_name.to_s.classify.constantize.create(model_attr_as_key.to_sym => attr)
        new_object.send("#{model_attr_as_value}=", value)
        new_object.save
        available_objects << new_object
      end
    end
  end
end

#deal_with_duplicate_method(arg) ⇒ Object 



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# File 'lib/act_as_attribute.rb', line 19

def deal_with_duplicate_method(arg)
  if self::ACCEPTANCE_LEVEL == "error"
    raise Exceptions::AlreadyPresentAsAttribute
  else
    warn "Warning: Method '#{arg}' already available as attribute"
  end
end

#get_constants ⇒ Object 



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# File 'lib/act_as_attribute.rb', line 10

def get_constants
  self::AVAILABLE_ATTRIBUTES ||= []
  self::ACCEPTANCE_LEVEL ||= "error"
end

#method_available_as_attribute?(attribute) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/act_as_attribute.rb', line 15

def method_available_as_attribute?(attribute)
  self.attribute_method?(attribute) ? true : false
end