gistfile1.rb

# Works
class NamedVoteHistoryList < ActiveRecord::Base
  belongs_to :user
  belongs_to :vote_history_list
  
  validates_presence_of :name 
  
  # validates :vote_history_list_id, :user_uniqueness => true <= This is the line
  
  def url
    #
  end
  
  def url=(url)
    #
  end
end

# Does not work

class NamedVoteHistoryList < ActiveRecord::Base
  belongs_to :user
  belongs_to :vote_history_list
  
  validates_presence_of :name
  
  validates :vote_history_list_id, :user_uniqueness => true
  
  def url
    #
  end
  
  def url=(url)
    #
  end
end