Changed ValueError to ValidationError

(Redmine issue: #7632)

lib/hawat/forms.py

@@ -596,7 +596,7 @@ class RadioFieldWithNone(wtforms.RadioField):
             if self.data == val:
                 break
         else:
-            raise ValueError(self.gettext("Not a valid choice"))
+            raise wtforms.validators.ValidationError(self.gettext("Not a valid choice"))
 
 
 class SelectFieldWithNone(wtforms.SelectField):
@@ -619,7 +619,7 @@ class SelectFieldWithNone(wtforms.SelectField):
             if self.data == val:
                 break
         else:
-            raise ValueError(self.gettext("Not a valid choice"))
+            raise wtforms.validators.ValidationError(self.gettext("Not a valid choice"))
 
 
 class BaseItemForm(flask_wtf.FlaskForm):