raw_id_fields: How to show a name instead of id?

From Django 2.0 you can use autocomplete_fields. It will work just like ajax select2.

In admin.py

class StructureAdmin(tree_editor.TreeEditor):
    search_fields = ('name',)
    autocomplete_fields = ('parent',)

Reference: https://docs.djangoproject.com/en/2.1/ref/contrib/admin/#django.contrib.admin.ModelAdmin.autocomplete_fields