add support for previewing pages

dnscms/events/models.py

@@ -30,6 +30,7 @@ from wagtail.fields import RichTextField
 from wagtail.models import Orderable, Page, PageManager, PageQuerySet
 from wagtail.search import index
 from wagtail.snippets.models import register_snippet
+from wagtail_headless_preview.models import HeadlessMixin
 
 from associations.widgets import AssociationChooserWidget
 from dnscms.fields import CommonStreamField
@@ -39,7 +40,7 @@ from venues.models import VenuePage
 
 
 @register_singular_query_field("eventIndex")
-class EventIndex(Page):
+class EventIndex(HeadlessMixin, Page):
     max_count = 1
     subpage_types = ["events.EventPage"]
 
@@ -220,7 +221,7 @@ class EventPageQuerySet(PageQuerySet):
 EventPageManager = PageManager.from_queryset(EventPageQuerySet)
 
 
-class EventPage(WPImportedPageMixin, Page):
+class EventPage(HeadlessMixin, WPImportedPageMixin, Page):
     subpage_types = []
     parent_page_types = ["events.EventIndex"]
     show_in_menus = False
@@ -358,7 +359,7 @@ class EventPage(WPImportedPageMixin, Page):
         GraphQLImage("featured_image"),
         GraphQLRichText("lead"),
         GraphQLStreamfield("body"),
-        GraphQLString("pig"),
+        GraphQLString("pig", required=True),
         GraphQLString("ticket_url"),
         GraphQLString("facebook_url"),
         GraphQLBoolean("free"),