"Create" tab not opening on custom User select form that inherits from AbstractUser

[brylie]

I created a UserChooserViewSet that uses a custom User model inheriting directly from AbstractUser. When I define the fields property, the "create" tab is rendered on the chooser modal. However, clicking the "create" tab doesn't display a form:

There do not appear to be any console errors.

[cspollar]

This issue doesn't seem to be limited to custom User model. I can't use the "Create" Tab on my Building model.

Below is my code for reference.

# models.py
class Event(Page):
    building = models.ForeignKey("events.Building", on_delete=models.PROTECT, null=True, blank=True)
    ...
    MultiFieldPanel(
        [
            FieldPanel('building', widget=BuildingChooser),
            ...
        ],
        heading="Location",
    ),

@register_snippet
class Building(models.Model):
    name = models.CharField(max_length=100, blank=False)

    def __str__(self):
        return self.name

# widgets.py
class BuildingChooser(AdminChooser):
    choose_one_text = 'Choose a building'
    choose_another_text = 'Choose a different building'
    link_to_chosen_text = 'Edit this building'
    choose_modal_url_name = 'building_chooser:choose'
    title_field_name = 'name'

    def get_instance(self, value):
        self.model = apps.get_model('events', 'Building')
        return super().get_instance(value)

    def render_html(self, name, value, attrs):
        self.model = apps.get_model('events', 'Building')
        return super().render_html(name, value, attrs)

    def get_edit_item_url(self, item):
        return reverse('wagtailsnippets:edit', args=('events', 'building', quote(item.pk)))

# views.py
class BuildingChooserViewSet(ModelChooserViewSet):
    icon = 'home'
    model = Building
    page_title = "Choose a building"
    per_page = 10
    order_by = 'name'
    fields = ['name',]

[cspollar]

@brylie I've confirmed the "Create" tab functionality works using wagtail==2.12, but not wagtail==2.12.3. It looks like the 2.13 streamfield updates broke this feature.

It looks like some compatibility issues where resolved in PR-31 by @gasman, but the "Create" tab may have been overlooked.

I've been poking around trying to understand Telepath, I'll post an update if I make any progress.

[gasman]

Turns out this is unrelated to the StreamField changes - Wagtail's tab handling was changed in https://github.com/wagtail/wagtail/commit/ca0154543aa79b463acf4a58ab45ccd8b8f6bd49 (as part of the commenting implementation) to look for a data-tab-nav attribute on the element, rather than the existing tab-nav classname (as used in wagtail-generic-chooser). PR coming up...

[cspollar]

Thanks for the fix! Users are happily creating and choosing again - all is well. 🥇