removed comments which apparently no-one bothers to read anyway. since no-one reads the comments, changed changeset model to use Time instead of DateTime. will probably have to change it back later, when someone else who doesn't read comments comes along.

app/models/changeset.rb

@@ -27,15 +27,11 @@ class Changeset < ActiveRecord::Base
   # maximum number of elements allowed in a changeset
   MAX_ELEMENTS = 50000
 
-  # maximum time a changeset is allowed to be open for (note that this
+  # maximum time a changeset is allowed to be open for.
-  # is in days - so one hour is Rational(1,24)).
   MAX_TIME_OPEN = 1.day
 
-  # idle timeout increment, one hour as a rational number of days.
+  # idle timeout increment, one hour seems reasonable.
-  # NOTE: DO NOT CHANGE THIS TO 1.hour! when this was done the idle
+  IDLE_TIMEOUT = 1.hour
-  # timeout changed to 1 second, which meant all changesets closed 
-  # almost immediately.
-  IDLE_TIMEOUT = 1.hour # Rational(1,24)
 
   # Use a method like this, so that we can easily change how we
   # determine whether a changeset is open, without breaking code in at 
@@ -46,12 +42,12 @@ class Changeset < ActiveRecord::Base
     # note that this may not be a hard limit - due to timing changes and
     # concurrency it is possible that some changesets may be slightly 
     # longer than strictly allowed or have slightly more changes in them.
-    return ((closed_at > DateTime.now) and (num_changes <= MAX_ELEMENTS))
+    return ((closed_at > Time.now) and (num_changes <= MAX_ELEMENTS))
   end
 
   def set_closed_time_now
     unless is_open?
-      self.closed_at = DateTime.now
+      self.closed_at = Time.now
     end
   end
   
@@ -156,7 +152,7 @@ class Changeset < ActiveRecord::Base
       if (closed_at - created_at) > (MAX_TIME_OPEN - IDLE_TIMEOUT)
         self.closed_at = created_at + MAX_TIME_OPEN
       else
-        self.closed_at = DateTime.now + IDLE_TIMEOUT
+        self.closed_at = Time.now + IDLE_TIMEOUT
       end
       self.save!