fix anonymous class issue

activerecord/lib/active_record/connection_adapters/abstract/connection_pool.rb

@@ -517,6 +517,7 @@ module ActiveRecord
 
       def establish_connection(owner, spec)
         @class_to_pool.clear
+        raise RuntimeError, "Anonymous class is not allowed." unless owner.name
         owner_to_pool[owner.name] = ConnectionAdapters::ConnectionPool.new(spec)
       end
 

activerecord/test/cases/connection_pool_test.rb

@@ -327,6 +327,20 @@ module ActiveRecord
       def test_pool_sets_connection_visitor
         assert @pool.connection.visitor.is_a?(Arel::Visitors::ToSql)
       end
+
+
+      #make sure exceptions are thrown when establish_connection
+      #is called with a anonymous class
+      def test_anonymous_class_exception
+        anonymous = Class.new(ActiveRecord::Base)
+        handler = ActiveRecord::Base.connection_handler
+        
+        assert_raises(RuntimeError){
+          handler.establish_connection anonymous, nil
+        }
+      end
+
+
     end
   end
 end