Hello
I have 2 models.
link.rb
has_many :categories, :as => :categorized validates_presence_of :name, :url, :created_at, :category
category.rb
belongs_to :categorized, :polymorphic => true validates_presence_of :name
Everything seems to work. I select my category from a select tag. The problem is i don't know how to validate if category is for example empty (nothing in a select tag), i would like to display the validation error along with other validation errors for link.
My create link controller.
def create @link = Link.new(params[:link])
if @link.save flash[:notice] = 'Link was successfully created.' category = Category.new(params[:category][:id]) category.categorized = @link category.save else render :action => "new" end end