🔨 fix model.CASCADE to model.DO_NOTHING

Author: aayushi-droid

api/migrations/0002_auto_20200912_1655.py

@@ -0,0 +1,19 @@
+# Generated by Django 3.0.6 on 2020-09-12 16:55
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('api', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='student',
+            name='student_school_name',
+            field=models.ForeignKey(default='', on_delete=django.db.models.deletion.DO_NOTHING, to='api.School'),
+        ),
+    ]

api/models.py

@@ -13,7 +13,7 @@ class Student(models.Model):
     Student_roll_no = models.IntegerField()
     student_registration_no = models.IntegerField(default=0)
     student_subject = models.TextField()
-    student_school_name = models.ForeignKey(School, on_delete=models.CASCADE, default="")
+    student_school_name = models.ForeignKey(School, on_delete=models.DO_NOTHING, default="")
 
 
     def __str__(self):