Fixed #21554 - Properly look up which table columns are on during multiple inheritance

[pegler]

For Issue #21554 - https://code.djangoproject.com/ticket/21554

[charettes]

You could retrieve target_model while avoiding creating a an unnecessary list and dict.

for seen_model, seen_alias in seen_models.items():
    if seen_model and seen_alias == alias:
        ancestor_link = seen_model._meta.get_ancestor_link(model)
        if ancestor_link:
            column = ancestor_link.column
        break

[charettes]

Thanks for your contribution; manually merged in 38e24d6.