add support for previewing pages

dnscms/news/models.py

@@ -5,13 +5,14 @@ from wagtail.admin.panels import FieldPanel
 from wagtail.fields import RichTextField
 from wagtail.models import Page
 from wagtail.search import index
+from wagtail_headless_preview.models import HeadlessMixin
 
 from dnscms.fields import CommonStreamField
 from dnscms.wordpress.models import WPImportedPageMixin
 
 
 @register_singular_query_field("newsIndex")
-class NewsIndex(Page):
+class NewsIndex(HeadlessMixin, Page):
     max_count = 1
     subpage_types = ["news.NewsPage"]
 
@@ -28,7 +29,7 @@ class NewsIndex(Page):
     search_fields = []
 
 
-class NewsPage(WPImportedPageMixin, Page):
+class NewsPage(HeadlessMixin, WPImportedPageMixin, Page):
     subpage_types = []
     parent_page_types = ["news.NewsIndex"]
     show_in_menus = False