create base model

project/blog/models.py

@@ -6,8 +6,10 @@ from wagtail.wagtailadmin.edit_handlers import FieldPanel
 from wagtail.wagtailimages.edit_handlers import ImageChooserPanel
 from wagtail.wagtailsearch import index
 
+from project.common.models import Entity
 
-class BlogPage(Page):
+
+class BlogPage(Entity):
     main_image = models.ForeignKey(
         'wagtailimages.Image',
         null=True,

project/common/models.py

@@ -3,7 +3,14 @@ from wagtail.wagtailcore.fields import RichTextField
 from wagtail.wagtailadmin.edit_handlers import FieldPanel
 
 
-class SectionIndexPage(Page):
+class Entity(Page):
+    is_home = False
+
+    class Meta:
+        abstract = True
+
+
+class SectionIndexPage(Entity):
     intro = RichTextField(blank=True)
 
     content_panels = Page.content_panels + [

project/home/models.py

@@ -2,8 +2,10 @@ from wagtail.wagtailcore.models import Page
 from wagtail.wagtailcore.fields import RichTextField
 from wagtail.wagtailadmin.edit_handlers import FieldPanel
 
+from project.common.models import Entity
 
-class HomePage(Page):
+
+class HomePage(Entity):
     is_home = True
 
     body = RichTextField(blank=True)