Merge branch 'data_migrations' into test

seminar/models.py

@@ -312,7 +312,7 @@ class Resitel(SeminarModelBase):
 		vsechna_reseni = self.reseni_set.all()
 		vsechna_hodnoceni = Hodnoceni.objects.filter(
 			reseni__in=vsechna_reseni)
-		return sum(h.body for h in list(vsechna_hodnoceni) if h is not None)
+		return sum(h.body for h in list(vsechna_hodnoceni) if h.body is not None)
 
 
 	def get_titul(self, body=None):
@@ -360,7 +360,7 @@ class Resitel(SeminarModelBase):
 		novejsi_hodnoceni = Hodnoceni.objects.filter(reseni__in=self.reseni_set.all()).difference(hodnoceni_do_25_rocniku)
 
 		def body_z_hodnoceni(hh : list):
-			return sum(h.body for h in hh if h is not None)
+			return sum(h.body for h in hh if h.body is not None)
 
 		stare_body = body_z_hodnoceni(hodnoceni_do_25_rocniku)
 		if body is None: