when clicking publish or save draft I got this error
wagtail.core.models.Page.DoesNotExist: Page matching query does not exist.
this happens only with old pages, the newly created pages are being able to be created and saved without any errors
NB: the new pages do not have children pages yet trying to find out what is causing this error despite I did not override the save method any suggestion or hint will be very helpful thank you
here the traceback:
wagtail.core.models.DoesNotExist
wagtail.core.models.Page.DoesNotExist: Page matching query does not exist.
Traceback (most recent call last)
File "/home/oladhari/.virtualenvs/gounite/lib/python3.8/site-packages/django/contrib/staticfiles/handlers.py", line 76, in __call__
return self.application(environ, start_response)
File "/home/oladhari/.virtualenvs/gounite/lib/python3.8/site-packages/django/core/handlers/wsgi.py", line 133, in __call__
response = self.get_response(request)
File "/home/oladhari/.virtualenvs/gounite/lib/python3.8/site-packages/django/core/handlers/base.py", line 130, in get_response
response = self._middleware_chain(request)
File "/home/oladhari/.virtualenvs/gounite/lib/python3.8/site-packages/django/core/handlers/exception.py", line 49, in inner
response = response_for_exception(request, exc)
File "/home/oladhari/.virtualenvs/gounite/lib/python3.8/site-packages/django/core/handlers/exception.py", line 103, in response_for_exception
response = handle_uncaught_exception(request, get_resolver(get_urlconf()), sys.exc_info())
File "/home/oladhari/.virtualenvs/gounite/lib/python3.8/site-packages/django/core/handlers/exception.py", line 138, in handle_uncaught_exception
return debug.technical_500_response(request, *exc_info)
File "/home/oladhari/.virtualenvs/gounite/lib/python3.8/site-packages/django_extensions/management/technical_response.py", line 37, in null_technical_500_response
six.reraise(exc_type, exc_value, tb)
File "/home/oladhari/.virtualenvs/gounite/lib/python3.8/site-packages/six.py", line 702, in reraise
raise value.with_traceback(tb)
File "/home/oladhari/.virtualenvs/gounite/lib/python3.8/site-packages/django/core/handlers/exception.py", line 47, in inner
response = get_response(request)
File "/home/oladhari/.virtualenvs/gounite/lib/python3.8/site-packages/django/core/handlers/base.py", line 181, in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/home/oladhari/.virtualenvs/gounite/lib/python3.8/site-packages/django/views/decorators/cache.py", line 44, in _wrapped_view_func
response = view_func(request, *args, **kwargs)
File "/home/oladhari/.virtualenvs/gounite/lib/python3.8/site-packages/wagtail/admin/urls/__init__.py", line 127, in wrapper
return view_func(request, *args, **kwargs)
File "/home/oladhari/.virtualenvs/gounite/lib/python3.8/site-packages/wagtail/admin/auth.py", line 172, in decorated_view
response = view_func(request, *args, **kwargs)
File "/home/oladhari/.virtualenvs/gounite/lib/python3.8/site-packages/django/views/generic/base.py", line 70, in view
return self.dispatch(request, *args, **kwargs)
File "/home/oladhari/.virtualenvs/gounite/lib/python3.8/site-packages/wagtail/admin/views/pages/edit.py", line 131, in dispatch
return super().dispatch(request)
File "/home/oladhari/.virtualenvs/gounite/lib/python3.8/site-packages/django/views/generic/base.py", line 98, in dispatch
return handler(request, *args, **kwargs)
File "/home/oladhari/.virtualenvs/gounite/lib/python3.8/site-packages/wagtail/admin/views/pages/edit.py", line 218, in post
return self.form_valid(self.form)
File "/home/oladhari/.virtualenvs/gounite/lib/python3.8/site-packages/wagtail/admin/views/pages/edit.py", line 238, in form_valid
return self.publish_action()
File "/home/oladhari/.virtualenvs/gounite/lib/python3.8/site-packages/wagtail/admin/views/pages/edit.py", line 286, in publish_action
revision.publish(
File "/home/oladhari/.virtualenvs/gounite/lib/python3.8/site-packages/wagtail/core/models.py", line 2972, in publish
page.save()
File "/home/oladhari/gounite-v2/GOunite/v2/home/models.py", line 98, in save
super().save(*args, **kwargs)
File "/usr/lib/python3.8/contextlib.py", line 75, in inner
return func(*args, **kwds)
File "/home/oladhari/.virtualenvs/gounite/lib/python3.8/site-packages/wagtail/core/models.py", line 1028, in save
result = super().save(**kwargs)
File "/home/oladhari/.virtualenvs/gounite/lib/python3.8/site-packages/modelcluster/models.py", line 199, in save
getattr(self, relation).commit()
File "/home/oladhari/.virtualenvs/gounite/lib/python3.8/site-packages/modelcluster/fields.py", line 202, in commit
item.delete()
File "/home/oladhari/.virtualenvs/gounite/lib/python3.8/site-packages/wagtail/core/models.py", line 1094, in delete
return Page.objects.get(id=self.id).delete(*args, **kwargs)
File "/home/oladhari/.virtualenvs/gounite/lib/python3.8/site-packages/django/db/models/manager.py", line 85, in manager_method
return getattr(self.get_queryset(), name)(*args, **kwargs)
File "/home/oladhari/.virtualenvs/gounite/lib/python3.8/site-packages/django/db/models/query.py", line 429, in get
raise self.model.DoesNotExist(
wagtail.core.models.Page.DoesNotExist: Page matching query does not exist.
Finally resolved it we should not use ParentalKey with a Page model (we were using it in GOPart model which is a Page model, changing it to ForeignKey resolved the error and now we can save the HomePage
class MyModel(RoutablePageMixin, Page, Orderable):
parent_page_types: list = []
company = ParentalKey(
"home.HomePage",
on_delete=models.SET_NULL,
verbose_name=_("Company"),
null=True,
blank=False,
)
changing it to:
class MyModel(RoutablePageMixin, Page):
parent_page_types: list = []
company = models.ForeignKey(
"home.HomePage",
on_delete=models.SET_NULL,
verbose_name=_("Company"),
null=True,
blank=False,
)
a Page can not be Orderable