title: Wrong number of arguments (0 for 1) in default scope
body: <p>I keep getting the error <code>ArgumentError: wrong number of arguments (0 for 1)</code> for my <code>default_scope</code> which is <code>default_scope { where("#{table_name}.tenant_id IS NULL") }</code></p>
  
  <p>It keeps giving me this error and I don't understand why.  I have the default scope in my users model.</p>
  
  <p><strong>Update:</strong></p>
  
  <p>Error output if using rails console:</p>
  
  <pre><code>ArgumentError: wrong number of arguments (0 for 1)
      from /home/evan/Apps/demo-application/app/models/user.rb:18:in `hash'
      from /home/evan/.rvm/gems/ruby-2.0.0-p195/gems/activerecord-4.0.4/lib/active_record/scoping.rb:64:in `value_for'
      from /home/evan/.rvm/gems/ruby-2.0.0-p195/gems/activesupport-4.0.4/lib/active_support/per_thread_registry.rb:40:in `public_send'
      from /home/evan/.rvm/gems/ruby-2.0.0-p195/gems/activesupport-4.0.4/lib/active_support/per_thread_registry.rb:40:in `block in method_missing'
      from /home/evan/.rvm/gems/ruby-2.0.0-p195/gems/activerecord-4.0.4/lib/active_record/scoping/default.rb:123:in `ignore_default_scope?'
      from /home/evan/.rvm/gems/ruby-2.0.0-p195/gems/activerecord-4.0.4/lib/active_record/scoping/default.rb:134:in `evaluate_default_scope'
      from /home/evan/.rvm/gems/ruby-2.0.0-p195/gems/activerecord-4.0.4/lib/active_record/scoping/default.rb:110:in `build_default_scope'
      from /home/evan/.rvm/gems/ruby-2.0.0-p195/gems/activerecord-4.0.4/lib/active_record/relation.rb:554:in `with_default_scope'
      from /home/evan/.rvm/gems/ruby-2.0.0-p195/gems/activerecord-4.0.4/lib/active_record/relation.rb:582:in `exec_queries'
      from /home/evan/.rvm/gems/ruby-2.0.0-p195/gems/activerecord-4.0.4/lib/active_record/relation.rb:471:in `load'
      from /home/evan/.rvm/gems/ruby-2.0.0-p195/gems/activerecord-4.0.4/lib/active_record/relation.rb:220:in `to_a'
      from /home/evan/.rvm/gems/ruby-2.0.0-p195/gems/activerecord-4.0.4/lib/active_record/relation.rb:573:in `inspect'
      from /home/evan/.rvm/gems/ruby-2.0.0-p195/gems/railties-4.0.4/lib/rails/commands/console.rb:90:in `start'
      from /home/evan/.rvm/gems/ruby-2.0.0-p195/gems/railties-4.0.4/lib/rails/commands/console.rb:9:in `start'
      from /home/evan/.rvm/gems/ruby-2.0.0-p195/gems/railties-4.0.4/lib/rails/commands.rb:62:in `&lt;top (required)&gt;'
      from bin/rails:4:in `require'
  </code></pre>
  
  <p>The <code>hash</code> is in my user model as below.</p>
  
  <pre><code> def User.new_remember_token
       SecureRandom.urlsafe_base64
   end
  
   def User.hash(token)
       Digest::SHA1.hexdigest(token.to_s)
   end
  
   private
  
       def create_remember_token
           self.remember_token = User.hash(User.new_remember_token)
       end
  </code></pre>
  
  <p>Error output if using rails server:</p>
  
  <pre><code>ArgumentError - wrong number of arguments (0 for 1):
    activerecord (4.0.4) lib/active_record/scoping.rb:70:in `set_value_for'
    activesupport (4.0.4) lib/active_support/per_thread_registry.rb:40:in `block in method_missing'
    activerecord (4.0.4) lib/active_record/scoping/default.rb:127:in `ignore_default_scope='
    activerecord (4.0.4) lib/active_record/scoping/default.rb:140:in `ensure in evaluate_default_scope'
    activerecord (4.0.4) lib/active_record/scoping/default.rb:140:in `evaluate_default_scope'
    activerecord (4.0.4) lib/active_record/scoping/default.rb:110:in `build_default_scope'
    activerecord (4.0.4) lib/active_record/relation.rb:554:in `with_default_scope'
    activerecord (4.0.4) lib/active_record/relation.rb:582:in `exec_queries'
    activerecord (4.0.4) lib/active_record/relation.rb:471:in `load'
    activerecord (4.0.4) lib/active_record/relation.rb:220:in `to_a'
    activerecord (4.0.4) lib/active_record/relation/finder_methods.rb:316:in `find_take'
    activerecord (4.0.4) lib/active_record/relation/finder_methods.rb:66:in `take'
    activerecord (4.0.4) lib/active_record/relation/finder_methods.rb:49:in `find_by'
    activerecord (4.0.4) lib/active_record/querying.rb:6:in `find_by'
    app/helpers/sessions_helper.rb:16:in `current_user'
    app/helpers/sessions_helper.rb:19:in `signed_in?'
  </code></pre>
  
  <p>And the relevant rails methods:</p>
  
  <pre><code>def ignore_default_scope? # :nodoc:
       ScopeRegistry.value_for(:ignore_default_scope, self)
  end
  
  def ignore_default_scope=(ignore) # :nodoc:
       ScopeRegistry.set_value_for(:ignore_default_scope, self, ignore)
  end
  </code></pre>