slugging

gistfile1.rb

  def make_slug(post_title)
    the_slug = post_title.gsub(/[\W_]/, '-').squeeze.chop.downcase
    return the_slug
  end

  def ensure_slug_not_duplicate
    the_slug = make_slug(self.title)
    post = Post.find_by(slug: the_slug)
    counter = 2
    while post && post != self
      the_slug = append_suffix(the_slug, counter)
      post = Post.find_by(slug: the_slug)
      counter += 1
    end
    self.slug = the_slug
  end

  def append_suffix(str,counter)
    if str.split('-').last.to_i != 0
      return str.split('-').slice(0...-1).join('-') + "-#{counter}"    
    else
      str = str + "-#{counter}"
    end
  end