If only life was that simple (it didnt help)

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@5658 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

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

@@ -87,6 +87,14 @@ module ActiveRecord
         end
       end
       
+      # Clears the cache which maps classes 
+      def clear_reloadable_connections!
+        @@active_connections.each do |name, conn|
+          conn.disconnect! if conn.supports_reloading?
+          @@active_connections.delete(name)
+        end
+      end
+
       # Verify active connections.
       def verify_active_connections! #:nodoc:
         if @@allow_concurrency

activerecord/lib/active_record/connection_adapters/abstract_adapter.rb

@@ -79,6 +79,12 @@ module ActiveRecord
         @active = false
       end
 
+      # Returns true if its safe to reload the connection between requests for development mode.
+      # This is not the case for Ruby/MySQL and it's not necessary for any adapters except SQLite.
+      def supports_reloading?
+        false
+      end
+
       # Lazily verify this connection, calling +active?+ only if it hasn't
       # been called for +timeout+ seconds.       
       def verify!(timeout)

activerecord/lib/active_record/connection_adapters/sqlite_adapter.rb

@@ -102,6 +102,10 @@ module ActiveRecord
         true
       end
 
+      def supports_reloading?
+        true
+      end
+
       def supports_count_distinct? #:nodoc:
         sqlite_version >= '3.2.6'
       end

activerecord/lib/active_record/vendor/mysql.rb

@@ -1173,14 +1173,8 @@ class << Mysql
 
   def finalizer(net)
     proc {
-      begin
-        net.clear
-        net.write Mysql::COM_QUIT.chr
-        net.close
-      rescue Error => error
-        # Swallow lost connection errors if connection is already closed.
-        raise unless error.errno == Error::CR_SERVER_LOST
-      end
+      net.clear
+      net.write Mysql::COM_QUIT.chr
     }
   end
 

railties/lib/dispatcher.rb

@@ -62,7 +62,7 @@ class Dispatcher
         Class.remove_class(*Reloadable.reloadable_classes)
       end
         
-      ActiveRecord::Base.clear_active_connections! if defined?(ActiveRecord)
+      ActiveRecord::Base.clear_reloadable_connections! if defined?(ActiveRecord)
     end
     
     # Add a preparation callback. Preparation callbacks are run before every
@@ -76,13 +76,16 @@ class Dispatcher
     def to_prepare(identifier = nil, &block)
       unless identifier.nil?
         callback = preparation_callbacks.detect { |ident, _| ident == identifier }
+
         if callback # Already registered: update the existing callback
           callback[-1] = block
           return
         end
       end
+
       preparation_callbacks << [identifier, block]
-      nil
+
+      return
     end
 
     private