start of a crasher fix

Author: runestonetest

controllers/dashboard.py

@@ -432,6 +432,12 @@ def subchapoverview():
 
     pt = data.pivot_table(index=idxlist, values=values, columns='sid', aggfunc=afunc)
 
+    # TODO: debug tests so these can be live
+    # if pt.empty:
+    #     logger.error("Empty Dataframe after pivot for {} ".format(auth.user.course_name))
+    #     session.flash = "Error: Not enough data"
+    #     return redirect(URL('dashboard','index'))
+
     cmap = pd.read_sql_query("""select chapter_num, sub_chapter_num, chapter_label, sub_chapter_label
         from sub_chapters join chapters on chapters.id = sub_chapters.chapter_id
         where chapters.course_id = '{}'