django simple history

all_history = atr.history.all().order_by('-date_updated')
for new_record, old_record in zip(all_history, all_history[1:]):
     print('new_record date updated', new_record.date_updated)
     print('old_record date updated', old_record.date_updated)
     delta = new_record.diff_against(old_record)
     for change in delta.changes:
         print(f"'{change.field}' changed from '{change.old}' to '{change.new}'")
     print('---')

all_history = atr.history.all()
for new_record, old_record in zip(all_history, all_history[1:]):
     print('new_record date updated', new_record.date_updated)
     print('old_record date updated', old_record.date_updated)
     delta = new_record.diff_against(old_record)
     for change in delta.changes:
         print(f"'{change.field}' changed from '{change.old}' to '{change.new}'")
     print('---')

def print_history_changes(obj):
    history = obj.history.order_by('history_date')
    fields = [f.name for f in obj._meta.fields]

    for i in range(1, len(history)):
        old = history[i-1]
        new = history[i]
        print(f"\n--- Change at: {new.history_date} by {new.history_user} ---")
        for field in fields:
            old_val = getattr(old, field)
            new_val = getattr(new, field)
            if old_val != new_val:
                print(f"{field}: {str(old_val)} → {str(new_val)}")
print history delta
