added ranking piece only button

rowers/views.py

@@ -4289,7 +4289,7 @@ def workouts_view(request,message='',successmessage='',
                   startdatestring="",enddatestring="",
                   startdate=timezone.now()-datetime.timedelta(days=365),
                   enddate=timezone.now()+datetime.timedelta(days=1),
-                  teamid=0):
+                  teamid=0,rankingonly=False):
     request.session['referer'] = absolute(request)['PATH']
     try:
 	r = getrower(request.user)
@@ -4365,6 +4365,9 @@ def workouts_view(request,message='',successmessage='',
                                             startdatetime__gte=activity_startdate,
                                             startdatetime__lte=activity_enddate).order_by("-startdatetime")
 
+    if rankingonly:
+        workouts = [w for w in workouts if w.rankingpiece]
+        
     query = request.GET.get('q')
     if query:
         query_list = query.split()
@@ -4407,6 +4410,7 @@ def workouts_view(request,message='',successmessage='',
                    'enddate':enddate,
                    'announcements':announcements[0:4],
                    'team':theteam,
+                   'rankingonly':rankingonly,
                    'teams':get_my_teams(request.user),
                    'interactiveplot':script,
                    'the_div':div,