Drift command does not follow inheritance from abstract models

[sevdog]

VS Code version

None

OS

Ubuntu

Steps to reproduce

1. Download django-guardian
2. Launch uvx django-orm-lens drift

...
 ~ guardian.groupobjectpermission:
     migrated but no longer declared: content_type, group, object_pk, permission
 ~ guardian.userobjectpermission:
     migrated but no longer declared: content_type, object_pk, permission, user
...

It shows that UserObjectPermission and GroupObjectPermission have fields "migrated but no longer declared" while the fields are declared in abstract models from which these inherits.

Sample models.py (minimized)

[FROWNINGdev]

Fixed on main in 55ab9f8 — thanks, this was a good catch and django-guardian was the perfect example.

You were exactly right about the cause. drift compared each model's migrations against only what its own class body declares, so every field arriving from an abstract base read as "migrated but no longer declared". On django-guardian that is four fields on each of UserObjectPermission and GroupObjectPermission — a project with no drift at all, reported as drifted.

The parser now resolves abstract inheritance the way Django does:

• an abstract base's fields land on every concrete descendant, through a chain of any depth, and across files;
• a field the child redeclares shadows the inherited one;
• a concrete base donates nothing, because multi-table inheritance leaves the parent's columns on the parent's table. Copying those would have swapped your false positive for the opposite one.

The inherited fields are kept in a separate inherited_fields list, so the sidebar tree and the ER diagrams still show what each class literally declares — only the schema-level consumers (drift, suggest-index) count them as the model's own.

Regression tests cover the guardian shape, a two-level chain, a child overriding an inherited field, a concrete parent donating nothing, and a base living in another app's models.py. There is also a test asserting that a genuinely unmigrated field still blocks — a fix that loosens a check should have to prove the check still bites.

Ships in the next release. Credited in the changelog and the roadmap.