👔(dashboard) disallow delete action for consents in admin.

Added `has_delete_permission` method to disable the delete action for all users in the Consent admin.
Included tests to ensure deletion is disallowed for existing objects and when no object is passed.
Updated the changelog accordingly.

src/dashboard/CHANGELOG.md

@@ -20,6 +20,7 @@ and this project adheres to
 - add consent form to manage consents of one or many entities 
 - add admin integration for Entity, DeliveryPoint and Consent
 - add mass admin action (make revoked) for consents
+- disallow mass action "delete" for consents in admin
 - block the updates of all new data if a consent has the status `REVOKED`
 - block the updates of all new data if a consent has the status `VALIDATED`
 - allow selected consent fields update if status changes from `VALIDATED` to  `REVOKED`

src/dashboard/apps/consent/admin.py

@@ -28,6 +28,10 @@ class ConsentAdmin(admin.ModelAdmin):
     date_hierarchy = "start"
     actions = ["make_revoked"]
 
+    def has_delete_permission(self, request, obj=None):
+        """Disable delete action permission for all users."""
+        return False
+
     @admin.action(description=_("Mark selected consents as revoked"))
     def make_revoked(self, request, queryset):
         """Mark selected consents as revoked."""

src/dashboard/apps/consent/tests/test_admin.py

@@ -62,3 +62,28 @@ def test_make_revoked_action(client, patch_timezone_now):
     assert consent.status == REVOKED
     assert consent.revoked_at == FAKE_TIME
     assert consent.updated_at == FAKE_TIME
+
+
+@pytest.mark.django_db
+def test_has_delete_permission_false_for_existing_object(rf):
+    """Test that the has_delete_permission disallows deletion of an existing object."""
+    # Initialize admin
+    admin = ConsentAdmin(Consent, AdminSite())
+    request = rf.get(reverse("admin:qcd_consent_consent_changelist"))
+
+    # create a consent
+    assert Consent.objects.count() == 0
+    DeliveryPointFactory()
+    assert Consent.objects.count() == 1
+
+    consent = Consent.objects.first()
+    assert admin.has_delete_permission(request, obj=consent) is False
+
+
+@pytest.mark.django_db
+def test_has_delete_permission_false_for_none_object(rf):
+    """Test has_delete_permission disallows deletion when no object is passed (None)."""
+    # Initialize admin
+    admin = ConsentAdmin(Consent, AdminSite())
+    request = rf.get(reverse("admin:qcd_consent_consent_changelist"))
+    assert admin.has_delete_permission(request, obj=None) is False