bug fix

do not save fitness metric if nan is the outcome

rowers/dataprepnodjango.py

@@ -676,6 +676,10 @@ def getsmallrowdata_db(columns,ids=[],debug=False):
         
 def fitnessmetric_to_sql(m,table='powertimefitnessmetric',debug=False,
                          doclean=False):
+    # test if nan among values
+    if np.nan in m.values():
+        return 0
+    
     if debug:
         engine = create_engine(database_url_debug, echo=False)
     else: