That’s because there is no schema per se for custom fields (aka post meta) in WordPress®. And that’s kind of the point.
You would need to maintain a list of them yourself somewhere in code, with say, the default values. Then you would retrieve the actual values per post and merge them into the defaults.
That’s because there is no schema per se for custom fields (aka post meta) in WordPress®. And that’s kind of the point.
You would need to maintain a list of them yourself somewhere in code, with say, the default values. Then you would retrieve the actual values per post and merge them into the defaults.
If you’re working with blocks or the JSON API, check out [register_post_meta](https://developer.wordpress.org/reference/functions/register_post_meta/).