fix(db-utils): fix batch_delete function (#6285)

Co-authored-by: Víctor Fernández Poyatos <victor@prowler.com>

api/src/backend/api/db_utils.py

@@ -5,7 +5,6 @@
 
 from django.conf import settings
 from django.contrib.auth.models import BaseUserManager
-from django.core.paginator import Paginator
 from django.db import connection, models, transaction
 from psycopg2 import connect as psycopg2_connect
 from psycopg2.extensions import AsIs, new_type, register_adapter, register_type
@@ -120,15 +119,18 @@ def batch_delete(queryset, batch_size=5000):
     total_deleted = 0
     deletion_summary = {}
 
-    paginator = Paginator(queryset.order_by("id").only("id"), batch_size)
-
-    for page_num in paginator.page_range:
-        batch_ids = [obj.id for obj in paginator.page(page_num).object_list]
+    while True:
+        # Get a batch of IDs to delete
+        batch_ids = set(
+            queryset.values_list("id", flat=True).order_by("id")[:batch_size]
+        )
+        if not batch_ids:
+            # No more objects to delete
+            break
 
         deleted_count, deleted_info = queryset.filter(id__in=batch_ids).delete()
 
         total_deleted += deleted_count
-
         for model_label, count in deleted_info.items():
             deletion_summary[model_label] = deletion_summary.get(model_label, 0) + count
 

api/src/backend/api/migrations/0005_update_provider_unique_constraint_with_is_deleted.py

@@ -0,0 +1,23 @@
+# Generated by Django 5.1.1 on 2024-12-20 13:16
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("api", "0004_rbac_missing_admin_roles"),
+    ]
+
+    operations = [
+        migrations.RemoveConstraint(
+            model_name="provider",
+            name="unique_provider_uids",
+        ),
+        migrations.AddConstraint(
+            model_name="provider",
+            constraint=models.UniqueConstraint(
+                fields=("tenant_id", "provider", "uid", "is_deleted"),
+                name="unique_provider_uids",
+            ),
+        ),
+    ]

api/src/backend/api/models.py

@@ -256,7 +256,7 @@ class Meta(RowLevelSecurityProtectedModel.Meta):
 
         constraints = [
             models.UniqueConstraint(
-                fields=("tenant_id", "provider", "uid"),
+                fields=("tenant_id", "provider", "uid", "is_deleted"),
                 name="unique_provider_uids",
             ),
             RowLevelSecurityConstraint(

api/src/backend/api/tests/integration/test_providers.py

@@ -0,0 +1,85 @@
+from unittest.mock import Mock, patch
+
+import pytest
+from conftest import get_api_tokens, get_authorization_header
+from django.urls import reverse
+from rest_framework.test import APIClient
+
+from api.models import Provider
+
+
+@patch("api.v1.views.Task.objects.get")
+@patch("api.v1.views.delete_provider_task.delay")
+@pytest.mark.django_db
+def test_delete_provider_without_executing_task(
+    mock_delete_task, mock_task_get, create_test_user, tenants_fixture, tasks_fixture
+):
+    client = APIClient()
+
+    test_user = "test_email@prowler.com"
+    test_password = "test_password"
+
+    prowler_task = tasks_fixture[0]
+    task_mock = Mock()
+    task_mock.id = prowler_task.id
+    mock_delete_task.return_value = task_mock
+    mock_task_get.return_value = prowler_task
+
+    user_creation_response = client.post(
+        reverse("user-list"),
+        data={
+            "data": {
+                "type": "users",
+                "attributes": {
+                    "name": "test",
+                    "email": test_user,
+                    "password": test_password,
+                },
+            }
+        },
+        format="vnd.api+json",
+    )
+    assert user_creation_response.status_code == 201
+
+    access_token, _ = get_api_tokens(client, test_user, test_password)
+    auth_headers = get_authorization_header(access_token)
+
+    create_provider_response = client.post(
+        reverse("provider-list"),
+        data={
+            "data": {
+                "type": "providers",
+                "attributes": {
+                    "provider": Provider.ProviderChoices.AWS,
+                    "uid": "123456789012",
+                },
+            }
+        },
+        format="vnd.api+json",
+        headers=auth_headers,
+    )
+    assert create_provider_response.status_code == 201
+    provider_id = create_provider_response.json()["data"]["id"]
+    provider_uid = create_provider_response.json()["data"]["attributes"]["uid"]
+
+    remove_provider = client.delete(
+        reverse("provider-detail", kwargs={"pk": provider_id}),
+        headers=auth_headers,
+    )
+    assert remove_provider.status_code == 202
+
+    recreate_provider_response = client.post(
+        reverse("provider-list"),
+        data={
+            "data": {
+                "type": "providers",
+                "attributes": {
+                    "provider": Provider.ProviderChoices.AWS,
+                    "uid": provider_uid,
+                },
+            }
+        },
+        format="vnd.api+json",
+        headers=auth_headers,
+    )
+    assert recreate_provider_response.status_code == 201

api/src/backend/api/tests/test_db_utils.py

@@ -2,7 +2,15 @@
 from enum import Enum
 from unittest.mock import patch
 
-from api.db_utils import enum_to_choices, one_week_from_now, generate_random_token
+import pytest
+
+from api.db_utils import (
+    batch_delete,
+    enum_to_choices,
+    generate_random_token,
+    one_week_from_now,
+)
+from api.models import Provider
 
 
 class TestEnumToChoices:
@@ -106,3 +114,26 @@ def test_generate_random_token_no_symbols_provided(self):
         token = generate_random_token(length=5, symbols="")
         # Default symbols
         assert len(token) == 5
+
+
+class TestBatchDelete:
+    @pytest.fixture
+    def create_test_providers(self, tenants_fixture):
+        tenant = tenants_fixture[0]
+        provider_id = 123456789012
+        provider_count = 10
+        for i in range(provider_count):
+            Provider.objects.create(
+                tenant=tenant,
+                uid=f"{provider_id + i}",
+                provider=Provider.ProviderChoices.AWS,
+            )
+        return provider_count
+
+    @pytest.mark.django_db
+    def test_batch_delete(self, create_test_providers):
+        _, summary = batch_delete(
+            Provider.objects.all(), batch_size=create_test_providers // 2
+        )
+        assert Provider.objects.all().count() == 0
+        assert summary == {"api.Provider": create_test_providers}