I've created two cpt's. I've associated custom fields unique to both.
Now I want to do a couple of things, starting with this.
Allow the normal WordPress search form to include in it's search text that is within the custom fields.
The idea is that if the user searches for a string, and that string is within custom field data, then WordPress's search results will indicate the posts that have that string within custom field data.
WordPress does not do this by default.
How can I do this?