I’m adding a custom column named Excerpt with Codepress Admin Columns, and would like to know specifically when the Excerpt has not been filled out. Instead WordPress shows post content automatically, if the excerpt is missing. This is also testable by switching on the “Excerpt View” from post list screen.
Implementing default_excerpt hook doesn’t seem to do anything for admin side. Grepping through codebase isn’t getting me anywhere in a reasonable amount of time so I’m asking for some help figuring this out.