RoutablePageMixin + i18n + Preview = not working

Today I’ve found strange issue. I have some page class:

class BlogPage(Page):
    ...

And urls.py:

urlpatterns = [
    url(r'^djangoadmin/', admin.site.urls),
    url(r'^wagtailadmin/', include(wagtailadmin_urls)),
    url(r'^doc/', include(wagtaildocs_urls)),
]

urlpatterns += i18n_patterns(
    url(r'', include(wagtail_urls)),
)

When I click “Preview” button in admin page, I see following requests:

[25/Jul/2016 13:29:19] "GET /wagtailadmin/pages/preview/ HTTP/1.1" 200 10327
[25/Jul/2016 13:29:20] "GET /wagtailadmin/pages/preview_loading/ HTTP/1.1" 200 9844
[25/Jul/2016 13:29:23] "POST /wagtailadmin/pages/19/edit/preview/ HTTP/1.1" 200 9594

And all works fine. But now I want to modify my page class:

class BlogPage(RoutablePageMixin, Page):

    @route(r'^tag/(\w+)/$', name='tag')
    def tag(self, request, tag):
    ...

Wagtail admin is still working. But when I open same page and click “Preview” - I see 404 page:

Page not found (404)
Request Method:     GET
Request URL:    http://127.0.0.1:8000/ru/wagtailadmin/pages/19/edit/preview/
Raised by:  wagtail.wagtailcore.views.serve

You can notice, that language tag appears in URI, but it shouldn’t - i18n isn’t enabled for admin pages. And now there are following requests:

[25/Jul/2016 13:35:52] "GET /wagtailadmin/pages/19/edit/ HTTP/1.1" 200 173884
[25/Jul/2016 13:35:58] "GET /wagtailadmin/pages/preview/ HTTP/1.1" 200 10326
[25/Jul/2016 13:35:59] "GET /wagtailadmin/pages/preview_loading/ HTTP/1.1" 200 9844
Not Found: /wagtailadmin/pages/19/edit/preview/
[2016-07-25 13:36:01.700] [WARNING   ] [django.request] [base/get_response] [p:320956|t:311696] || Not Found: /wagtailadmin/pages/19/edit/preview/
[25/Jul/2016 13:36:01] "POST /wagtailadmin/pages/19/edit/preview/ HTTP/1.1" 302 0
Not Found: /ru/wagtailadmin/pages/19/edit/preview/
[2016-07-25 13:36:01.755] [WARNING   ] [django.request] [base/get_response] [p:320956|t:324092] || Not Found: /ru/wagtailadmin/pages/19/edit/preview/
[25/Jul/2016 13:36:01] "GET /ru/wagtailadmin/pages/19/edit/preview/ HTTP/1.1" 404 1741

I’ve also tried to remove any routes:

class BlogPage(RoutablePageMixin, Page):
    ... (only fields here)

And requests are now:

[25/Jul/2016 13:37:17] "GET /wagtailadmin/pages/preview/ HTTP/1.1" 200 10327
[25/Jul/2016 13:37:18] "GET /wagtailadmin/pages/preview_loading/ HTTP/1.1" 200 9844
Not Found: /wagtailadmin/pages/19/edit/preview/
[2016-07-25 13:37:20.804] [WARNING   ] [django.request] [base/get_response] [p:322080|t:319612] || Not Found: /wagtailadmin/pages/19/edit/preview/
[25/Jul/2016 13:37:20] "POST /wagtailadmin/pages/19/edit/preview/ HTTP/1.1" 200 2084

[kaedroho]

I think you’re missing the “main” view on the routable page, this must be defined when you switch to using the RoutablePageMixin.

Try adding the following to your model:

from django.template import TemplateResponse


    @route(r'^$')
    def main(self, request):
        return TemplateResponse(request, self.get_template(), self.get_context())

If you need further support, please post in our support group instead: https://groups.google.com/forum/#!forum/wagtail

[andreasnuesslein]

not sure if referencing this issue automatically triggers you guys to get this update so: I created a PR: #3344 😃