RichTextBlock link and embed HTML isn't rewritten

[PeterDekkers]

It seems that any RichTextBlock instances are passing their HTML string values straight through the streamfield resolver. This results in Wagtail's proprietary faux-HTML being exposed.

E.g. internal links in Wagtail's RichTextBlock are stored as such:

<a id="7" linktype="page">link to somewhere internal</a>

When Wagtail renders this to a final template the HTML is normally rewritten using some specific rewriter functions. The above example, when rewritten, would then become something like:

<a href="/somewhere">link to somewhere internal</a>

wagtail-graphql doesn't seem to do this.

There is a handy helper function available called expand_db_html which could be leveraged.

Or maybe I'm not doing it right? Should I register these rewriters specifically?