wagtail 4.0/ How return urls (templates) for preview in admin board from #path - wagtail

Question

class ProductIndexPage(RoutablePageMixin, Page):
subpage_types = ['ProductPage']
parent_page_types = ['home.HomePage']
def live_categories(self):
all_products_live_id = ProductPage.objects.live().values_list('categories_id', flat=True)
list_live_id_uniqe = list(set(all_products_live_id))
live_cat = ProductCategory.objects.filter(id__in=list_live_id_uniqe).order_by('-id')
return live_cat
#path('')
#path('all-categories/')
def all_category_page(self, request):
productpages = self.get_children().live().order_by('-first_published_at')
return self.render(request, context_overrides={
'title': self.title,
'productpages': productpages,
'live_categories': self.live_categories,
})
#path('<str:cat_name>/', name='cat_url')
def current_category_page(self, request, cat_name=None):
productpages = ProductPage.objects.live().filter(categories__slug__iexact=cat_name).order_by \
('-first_published_at')
current_cat = self.live_categories().get(slug=cat_name).name
return self.render(request, context_overrides={
'title': "%s" % current_cat,
'productpages': productpages,
'live_categories': self.live_categories,
})
#path('<str:cat_name>/<str:prod_name>/')
def product_page(self, request, cat_name=None, prod_name=None):
product = ProductPage.objects.get(categories__slug__iexact=cat_name, slug=prod_name)
return self.render(request, context_overrides={
'product': product},
template="products/product_page.html",)
I can't edit page in wagtail admin menu from path:
#path('<str:cat_name>/<str:prod_name>/')
My page tree in admin:
root/products/<prod_name>
How to change route in Admin for editing pages from wagtal button or for preview in Admin?
I am newbie, plz show me example.
sorry for English)

Answer 1

With RoutablePageMixin there is only one page - and it displays differently depending on the parameter sent on the url. Unfortunately, this means you can't preview the category version of your page, current_category_page.
But it looks like the product page you are routing too as #path('str:cat_name/str:prod_name/') should be displaying the same page as you serve from the ProductPage's own url. So the ProductPage you see in the preview ProductIndexPage + 'str:cat_name/str:prod_name/'