Module: Dagnabit::Link::Validations

Defined in:
lib/dagnabit/link/validations.rb

Overview

Basic validations on link models.

This module only installs ancestor and descendant presence validations; the only basic requirement for a link is that it have a valid start point and a valid end point. We validate the presence of the ancestor and descendant, instead of ancestor_id and descendant_id, in order to permit scenarios like this:

n1 = Node.new
n2 = Node.new
l = Link.new(:ancestor => n1, :descendant => n2)
l.save  # will save l, n1, and n2

Class Method Summary collapse

Class Method Details

.extended(base) ⇒ Object 



18
19
20
21
22
23
 
# File 'lib/dagnabit/link/validations.rb', line 18

def self.extended(base)
  base.send(:validates_presence_of, :ancestor)
  base.send(:validates_presence_of, :descendant)
  base.send(:validates_associated, :ancestor)
  base.send(:validates_associated, :descendant)
end