How to allow unique values in an array in Sanity.io schema.

how to allow this only one time for each,

export default defineType({

title: 'Component Builder',

name: 'pageBuilder',

type: 'array',

of: [

{

type: 'header',

validation: Rule => Rule.unique()

},

{

type: 'footer',

validation: Rule => Rule.unique()

},

],

})

You can create a custom validation on the array
https://www.sanity.io/docs/validation

already have

validation: Rule => Rule.unique()

but isnt working

done, thank you!

why don’t just add the header and the footer in separate fields?…. and the other components in the array?

^ or even better, create some setting documents containing all the header/footer info. Fetch it once and use it through the entire app. No need to rerender the header and footer on every route change (assuming you use some kind of frontend framework)