Only validate foreign key if required or data is present.

timster · Mar 21, 2016 · 53b4da9 · 53b4da9
1 parent a74294f
commit 53b4da9
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/peewee_validates.py b/peewee_validates.py
@@ -218,7 +218,7 @@ def clean(self, value, data):
                 raise ValidationError('unique')
 
         # Validate foreign key reference (and return the instance).
-        if isinstance(self.field, peewee.ForeignKeyField):
+        if (value or not self.field.null) and isinstance(self.field, peewee.ForeignKeyField):
             try:
                 return self.field.rel_model.get(self.field.to_field == value)
             except self.field.rel_model.DoesNotExist: