Reorder Array of Singleton References - Custom Validation Function

Hey all, I have an array of references to some singletons. This array will be used to generate the order of links in a navbar. I'd like to be able to reorder the array in Studio to determine navbar order, but prevent users from adding or removing any items from the array. Is this possible?

I was going to suggest validation with a min and max (

validation: Rule => Rule.min(3).max(3).required(),

, for example), but that would still permit someone to delete an item and add a different one to satisfy the validation rule and publish.
Is it critical that they can re-order the items?

Yeah, reordering is critical. For example, I have singleton documents for About, Products, Services, and Portfolio, that I'd like to query and render in a nav bar in Gatsby. I don't want users to be able to add or remove any of these items from the nav bar, but I do want an easier way of reordering them in the Studio instead of hard coding order in Gatsby.

Deleting array items seems to be impossible* when the validation above is combined with

liveEdit: true

(docs ). I’m not sure if that’s feasible in your case. Another possibility might be using webhooks to reinstate the array if an item is added/removed, but I’m not totally sure that’ll work.
* Through the studio. This all assumes no users are using the CLI/API.

Deleting array items seems to be impossible when the validation above is combined with

liveEdit: true

(docs ). I’m not sure if that’s feasible in your case. Another possibility might be using webhooks to reinstate the array if an item is added/removed, but I’m not totally sure that’ll work.

I think you could do a custom validation function that checks the array for the presence of each item. It would still be a hard coded list, but order would be flexible.

^ Great point. For a not-often-changing array, this should work well. The downside is that it imposes a dependency on a developer when the list items need to change.