in stroke extra metrics (diff, minpos, maxpos)

rowers/dataprep.py

@@ -1663,6 +1663,11 @@ def getsmallrowdata_db(columns, ids=[], doclean=True, workstrokesonly=True):
     if extracols and len(ids)==1:
         w = Workout.objects.get(id=ids[0])
         row = rdata(w.csvfilename)
+        try:
+            row.set_instroke_metrics()
+        except AttributeError:
+            pass
+
         try:
             f = row.df['TimeStamp (sec)'].diff().mean()
         except AttributeError:

rowers/views.py

@@ -8410,6 +8410,10 @@ def workout_flexchart3_view(request,*args,**kwargs):
 
     
     rowdata = rdata(row.csvfilename)
+    try:
+        rowdata.set_instroke_metrics()
+    except AttributeError:
+        pass
     try:
         additionalmetrics = rowdata.get_additional_metrics()
     except AttributeError: