export default { title: "Lesson", name: "lesson", type: "document", fields: [ { title: "Belongs to Category", name: "category", type: "reference", to: [{type: "category"}], validation: Rule => [ Rule.required() ] }, { title: "Name", name: "name", type: "string", validation: Rule => [ Rule.required() ] }, { title: "Description", name: "description", type: "text", validation: Rule => [ Rule.required() ] }, ], //... }