Fix the logic which locates the social image and description. It was broken because the template tag {% wagtail_site %} was being misused, and the lookup logic was also fragile.
For all page types that inherit from PromoteMixin, and additionally have an introduction field (which is to say, most pages), the social description now uses introduction as a fallback.
I've been able to do limited testing locally because social metadata validators need a live website to query. Please let me know when this code is deployed to staging and I'll do some more testing.
Fixes https://github.com/ietf-tools/wagtail_website/issues/191.
{% wagtail_site %}was being misused, and the lookup logic was also fragile.main_imagefield.PromoteMixin, and additionally have anintroductionfield (which is to say, most pages), the social description now usesintroductionas a fallback.I've been able to do limited testing locally because social metadata validators need a live website to query. Please let me know when this code is deployed to staging and I'll do some more testing.