improve structured SEO data, v39

blog/models.py

@@ -1,3 +1,5 @@
+from typing import Optional
+
 from django import forms
 from django.db import models
 from modelcluster.fields import ParentalKey, ParentalManyToManyField
@@ -95,6 +97,19 @@ class BlogPage(SeoMixin, Page):
     promote_panels = SeoMixin.seo_panels
     seo_content_type = SeoType.ARTICLE
 
+    @property
+    def seo_author(self) -> str:
+        return ', '.join([author.name for author in self.authors.all()])
+
+    @property
+    def seo_canonical_url(self) -> str:
+        # replace http:// with https://
+        return super().seo_canonical_url.replace('http://', 'https://')
+
+    @property
+    def seo_struct_publisher_dict(self) -> Optional[dict]:
+        return None
+
 
 class BlogPageGalleryImage(Orderable):
     page = ParentalKey(BlogPage, on_delete=models.CASCADE, related_name='gallery_images')