Set ForeignKey on_delete (required in django 4)

singular-labs · Mar 26, 2023 · eac8b39 · eac8b39
1 parent f6a7b9a
commit eac8b39
Showing 1 changed file with 1 addition and 2 deletions.
diff --git a/currencies/models.py b/currencies/models.py
@@ -52,8 +52,7 @@ def save(self, **kwargs):
 
 
 class DailyCurrencyExchangeRate(models.Model):
-
-    currency = models.ForeignKey(Currency, db_index=True)
+    currency = models.ForeignKey(Currency, db_index=True, on_delete=models.SET_NULL)
     factor = models.DecimalField(_('factor'), max_digits=30, decimal_places=10, default=1.0,
         help_text=_('Specifies the difference of the currency to default one.'))
     date = models.DateField(db_index=True)