Make page edit view into a class-based view

wagtail/admin/urls/pages.py

@@ -12,7 +12,7 @@ urlpatterns = [
     path('add/<slug:content_type_app_name>/<slug:content_type_model_name>/<int:parent_page_id>/preview/', preview.PreviewOnCreate.as_view(), name='preview_on_add'),
     path('usage/<slug:content_type_app_name>/<slug:content_type_model_name>/', usage.content_type_use, name='type_use'),
 
-    path('<int:page_id>/edit/', edit.edit, name='edit'),
+    path('<int:page_id>/edit/', edit.EditView.as_view(), name='edit'),
     path('<int:page_id>/edit/preview/', preview.PreviewOnEdit.as_view(), name='preview_on_edit'),
 
     path('<int:page_id>/view_draft/', preview.view_draft, name='view_draft'),

wagtail/admin/views/pages/edit.py

@@ -10,6 +10,7 @@ from django.utils.html import format_html
 from django.utils.http import urlquote
 from django.utils.safestring import mark_safe
 from django.utils.translation import gettext as _
+from django.views.generic.base import View
 
 from wagtail.admin import messages
 from wagtail.admin.action_menu import PageActionMenu
@@ -19,7 +20,8 @@ from wagtail.core.exceptions import PageClassNotFoundError
 from wagtail.core.models import Page, WorkflowState
 
 
-def edit(request, page_id):
+class EditView(View):
+    def dispatch(self, request, page_id):
         real_page_record = get_object_or_404(Page, id=page_id)
         latest_revision = real_page_record.get_latest_revision()
         content_type = real_page_record.cached_content_type