django2.2: add default mandatory on_delete on OneToOneField

accounting/models.py

@@ -352,6 +352,7 @@ class Operation(models.Model):
         null=True,
         blank=True,
         default=None,
+        on_delete=models.CASCADE,
     )
 
     class Meta:

club/models.py

@@ -96,7 +96,9 @@ class Club(models.Model):
         blank=True,
         on_delete=models.SET_NULL,
     )
-    page = models.OneToOneField(Page, related_name="club", blank=True, null=True)
+    page = models.OneToOneField(
+        Page, related_name="club", blank=True, null=True, on_delete=models.CASCADE
+    )
 
     class Meta:
         ordering = ["name", "unix_name"]

counter/models.py

@@ -51,7 +51,7 @@ class Customer(models.Model):
     is used by other accounting classes as reference to the customer, rather than using User
     """
 
-    user = models.OneToOneField(User, primary_key=True)
+    user = models.OneToOneField(User, primary_key=True, on_delete=models.CASCADE)
     account_id = models.CharField(_("account id"), max_length=10, unique=True)
     amount = CurrencyField(_("amount"))
     recorded_products = models.IntegerField(_("recorded product"), default=0)
@@ -727,7 +727,10 @@ class Eticket(models.Model):
     """
 
     product = models.OneToOneField(
-        Product, related_name="eticket", verbose_name=_("product")
+        Product,
+        related_name="eticket",
+        verbose_name=_("product"),
+        on_delete=models.CASCADE,
     )
     banner = models.ImageField(
         upload_to="etickets", null=True, blank=True, verbose_name=_("banner")

forum/models.py

@@ -421,7 +421,9 @@ class ForumUserInfo(models.Model):
     user, such as the favourite topics, the signature, and so on...
     """
 
-    user = models.OneToOneField(User, related_name="_forum_infos")
+    user = models.OneToOneField(
+        User, related_name="_forum_infos", on_delete=models.CASCADE
+    )
     last_read_date = models.DateTimeField(
         _("last read date"),
         default=datetime(

launderette/models.py

@@ -37,7 +37,10 @@ from club.models import Club
 class Launderette(models.Model):
     name = models.CharField(_("name"), max_length=30)
     counter = models.OneToOneField(
-        Counter, verbose_name=_("counter"), related_name="launderette"
+        Counter,
+        verbose_name=_("counter"),
+        related_name="launderette",
+        on_delete=models.CASCADE,
     )
 
     class Meta:

stock/models.py

@@ -39,7 +39,10 @@ class Stock(models.Model):
 
     name = models.CharField(_("name"), max_length=64)
     counter = models.OneToOneField(
-        Counter, verbose_name=_("counter"), related_name="stock"
+        Counter,
+        verbose_name=_("counter"),
+        related_name="stock",
+        on_delete=models.CASCADE,
     )
 
     def __str__(self):

trombi/models.py

@@ -80,7 +80,7 @@ class Trombi(models.Model):
     show_profiles = models.BooleanField(
         _("show users profiles to each other"), default=True
     )
-    club = models.OneToOneField(Club, related_name="trombi")
+    club = models.OneToOneField(Club, related_name="trombi", on_delete=models.CASCADE)
 
     objects = TrombiManager()
     availables = AvailableTrombiManager()
@@ -117,7 +117,10 @@ class TrombiUser(models.Model):
     """
 
     user = models.OneToOneField(
-        User, verbose_name=_("trombi user"), related_name="trombi_user"
+        User,
+        verbose_name=_("trombi user"),
+        related_name="trombi_user",
+        on_delete=models.CASCADE,
     )
     trombi = models.ForeignKey(
         Trombi,