Require a file field has an asset.
defineField({ name: 'video', title: 'Video', type: 'sanity.video', validation: (Rule) => Rule.required().assetRequired(),}) Copy
defineField({ name: 'video', title: 'Video', type: 'sanity.video', validation: (Rule) => Rule.required().assetRequired(),})
Require a file field has an asset.