update erd db and add display name to user access table

backend/apps/accounts/migrations/0005_user_display_name.py

@@ -0,0 +1,25 @@
+from django.db import migrations, models
+
+
+def backfill_display_name(apps, schema_editor):
+    User = apps.get_model("accounts", "User")
+    for user in User.objects.all().iterator():
+        if not (user.display_name or "").strip():
+            User.objects.filter(pk=user.pk).update(display_name=user.user_name)
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("accounts", "0004_sync_status_flags"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="user",
+            name="display_name",
+            field=models.CharField(default="", max_length=100),
+            preserve_default=False,
+        ),
+        migrations.RunPython(backfill_display_name, migrations.RunPython.noop),
+    ]

backend/apps/accounts/models.py

@@ -13,6 +13,7 @@ class UserManager(BaseUserManager):
         if not user_name:
             raise ValueError("user_name is required")
         extra_fields.setdefault("status", User.STATUS_ACTIVE)
+        extra_fields.setdefault("display_name", user_name)
         user = self.model(user_name=user_name, **extra_fields)
         user.set_password(password)
         user.save(using=self._db)
@@ -39,6 +40,7 @@ class User(AbstractBaseUser, PermissionsMixin):
 
     user_id = models.BigAutoField(primary_key=True)
     user_name = models.CharField(max_length=30, unique=True)
+    display_name = models.CharField(max_length=100)
     status = models.CharField(max_length=30, choices=STATUS_CHOICES, default=STATUS_ACTIVE)
     is_staff = models.BooleanField(default=False)
     is_active = models.BooleanField(default=True)

backend/apps/accounts/serializers.py

@@ -15,8 +15,8 @@ class PkAsIdMixin(serializers.Serializer):
 class UserSerializer(PkAsIdMixin, serializers.ModelSerializer):
     class Meta:
         model = User
-        fields = ["id", "user_name", "status", "created_at", "updated_at"]
-        read_only_fields = ["id", "created_at", "updated_at"]
+        fields = ["id", "user_name", "display_name", "status", "created_at", "updated_at"]
+        read_only_fields = ["id", "user_name", "created_at", "updated_at"]
 
 
 class LoginSerializer(serializers.Serializer):