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Changes between Initial Version and Version 1 of Ticket #29691

-              initial
+              v1
 Can we perhaps add an exception (not Exception!) for child models that override the automatic ptr field that is a OneToOneField, with a ForeignKey ?
+An example use case:
+{{{
+class Caller(models.Model):
+    callback = models.CharField()
+    max_attemps = models.IntegerField(default=1)
+    def call(self):
+         call = Call(caller_ptr=self)
+         try:
+             call.execute()
+         except:
+             if self.max_attempts > Call.objects.filter(caller_ptr=self):
+                 return self.call()
+             raise
+         return call.result
+class Call(Caller):
+    result = models.PickleField()
+    def call(self):
+         self.result = import_string(self.callback)()
+         return self.result
+}}}
 Thanks