From 9b4624793c42b3340628412727811c9cfdb1ab24 Mon Sep 17 00:00:00 2001
From: Evgeny <startsev2000@outlook.com>
Date: Fri, 6 Sep 2024 13:16:02 +0300
Subject: [PATCH] Fix issue with student deletion

---
 .../0003_fix_delete_student_again.py          | 27 +++++++++++++++++++
 back-end/src/ams/models/applicants.py         |  8 ++++--
 .../lms/migrations/0008_fix_delete_student.py | 20 ++++++++++++++
 back-end/src/lms/models/students.py           |  4 ++-
 4 files changed, 56 insertions(+), 3 deletions(-)
 create mode 100644 back-end/src/ams/migrations/0003_fix_delete_student_again.py
 create mode 100644 back-end/src/lms/migrations/0008_fix_delete_student.py

diff --git a/back-end/src/ams/migrations/0003_fix_delete_student_again.py b/back-end/src/ams/migrations/0003_fix_delete_student_again.py
new file mode 100644
index 00000000..3a536fe3
--- /dev/null
+++ b/back-end/src/ams/migrations/0003_fix_delete_student_again.py
@@ -0,0 +1,27 @@
+# Generated by Django 3.2.20 on 2024-09-06 09:38
+
+from django.conf import settings
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+        ('common', '0003_program_available_to_choose_for_applicants'),
+        ('ams', '0002_applicationprocess_mtc_admission_year'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='applicant',
+            name='contact_info',
+            field=models.OneToOneField(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, to='common.contactinfo'),
+        ),
+        migrations.AlterField(
+            model_name='applicant',
+            name='user',
+            field=models.OneToOneField(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, to=settings.AUTH_USER_MODEL),
+        ),
+    ]
diff --git a/back-end/src/ams/models/applicants.py b/back-end/src/ams/models/applicants.py
index fe11d777..8e738e26 100644
--- a/back-end/src/ams/models/applicants.py
+++ b/back-end/src/ams/models/applicants.py
@@ -149,7 +149,9 @@ class Applicant(models.Model):
     )
     contact_info = models.OneToOneField(
         to=ContactInfo,
-        on_delete=models.RESTRICT,
+        on_delete=models.SET_NULL,
+        null=True,
+        blank=True,
     )
     photo = models.OneToOneField(
         to=Photo,
@@ -172,7 +174,9 @@ class Applicant(models.Model):
     )
     user = models.OneToOneField(
         to=get_user_model(),
-        on_delete=models.RESTRICT,
+        on_delete=models.SET_NULL,
+        null=True,
+        blank=True,
     )
 
     objects = ApplicantManager()
diff --git a/back-end/src/lms/migrations/0008_fix_delete_student.py b/back-end/src/lms/migrations/0008_fix_delete_student.py
new file mode 100644
index 00000000..386c6188
--- /dev/null
+++ b/back-end/src/lms/migrations/0008_fix_delete_student.py
@@ -0,0 +1,20 @@
+# Generated by Django 3.2.20 on 2024-09-06 09:30
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('common', '0003_program_available_to_choose_for_applicants'),
+        ('lms', '0007_alter_mark_changed_by'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='student',
+            name='contact_info',
+            field=models.OneToOneField(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, to='common.contactinfo'),
+        ),
+    ]
diff --git a/back-end/src/lms/models/students.py b/back-end/src/lms/models/students.py
index b36105af..71757358 100644
--- a/back-end/src/lms/models/students.py
+++ b/back-end/src/lms/models/students.py
@@ -72,7 +72,9 @@ class Post(models.TextChoices):
     )
     contact_info = models.OneToOneField(
         to=ContactInfo,
-        on_delete=models.RESTRICT,
+        on_delete=models.SET_NULL,
+        null=True,
+        blank=True,
     )
 
     # --------------------------------------------------------------------------