On Save – Update or Delete Custom Field?

Next, we need to save the new raw subtitle value into the database. You already know how to do that, as you did it in the last lab (i.e. Post Metadata Basics). But we need to think about whether we should update the metadata when it’s empty, meaning no subtitle. Hmm, should we update to no value or delete it from the database?

My vote: delete it. Let’s write the logic that handles both the update and delete tasks.

As part of this process, we have to think about what “empty” means. Is 0 an empty? For a subtitle, yes. However, when you have a custom field for say number of videos or number of views or whatever, then 0 is a valid value and is not “empty”. Therefore, it should be saved to the database.

Let’s talk about handling the difference between “empty” (meaning an empty string) verses a falsey state.

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