some more improvements

rowers/views.py

@@ -4457,6 +4457,19 @@ class JSONResponse(HttpResponse):
         super(JSONResponse, self).__init__(content, **kwargs)
         
 def strokedatajson(request,id):
+    try:
+	row = Workout.objects.get(id=id)
+	if (checkworkoutuser(request.user,row)==False):
+	    return HttpResponse("Permission error")
+    except Workout.DoesNotExist:
+	return HttpResponse("Workout doesn't exist")
+    try:
+        id = int(id)
+    except ValueError:
+        return HttpRespone("Not a valid workout number")
+
+
     if request.method == 'GET':
-        datadf,row = dataprep.getrowdata_db(id=id)
+        columns = ['spm','timesecs','hr','pseconds','power','distance']
+        datadf = dataprep.getsmallrowdata_db(columns,ids=[id])
         return JSONResponse(datadf)