update backend/dvadmin/utils/models.py 处理级联删除

当模型中指定了`on_delete=models.CASCADE`实现级联软删除关联对象的逻辑。对于一对一、一对多和多对多关系的对象，都会进行软删除处理。

Signed-off-by: 老高 <794071084@qq.com>

backend/dvadmin/utils/models.py

@@ -61,8 +61,24 @@ class SoftDeleteModel(models.Model):
         """
         重写删除方法,直接开启软删除
         """
-        self.is_deleted = True
-        self.save(using=using)
+        if soft_delete:
+            self.is_deleted = True
+            self.save(using=using)
+            # 级联软删除关联对象
+            for related_object in self._meta.related_objects:
+                related_model = getattr(self, related_object.get_accessor_name())
+                # 处理一对多和多对多的关联对象
+                if related_object.one_to_many or related_object.many_to_many:
+                    related_objects = related_model.all()
+                elif related_object.one_to_one:
+                    related_objects = [related_model]
+                else:
+                    continue
+
+                for obj in related_objects:
+                    obj.delete(soft_delete=True)
+        else:
+            super().delete(using=using, *args, **kwargs)
 
 
 class CoreModel(models.Model):