fix: changed on_delete func from CASCADE to DO_NOTHING in all models

application/backend/projects/models.py

@@ -27,7 +27,7 @@ class Report(models.Model):
     anyone_going_vacation = models.CharField(max_length=100,default="Nobody")
     other_comments = models.TextField(max_length=1000,default="Nothing")
     report_creater = models.ForeignKey(Employee, on_delete = models.DO_NOTHING,default=0)
-    related_project = models.ForeignKey(to="Project",on_delete=models.CASCADE,default=0)
+    related_project = models.ForeignKey(to="Project",on_delete=models.DO_NOTHING,default=0)
     is_deleted = models.BooleanField(default=False)
     final_report_color = models.CharField(max_length=1,choices=COLOR_CHOICES,default='G')
 
@@ -52,7 +52,7 @@ class Objective(models.Model):
     }
     objective_name = models.CharField(max_length=100)
     objective_color = models.CharField(max_length=1,choices=COLOR_CHOICES,default="G")
-    related_report = models.ForeignKey(to = "Report", on_delete=models.CASCADE,default=0)
+    related_report = models.ForeignKey(to = "Report", on_delete=models.DO_NOTHING,default=0)
     is_deleted = models.BooleanField(default=False)
     objective_descripion = models.CharField(max_length=100)
     def __str__(self):