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import { DocumentTextIcon } from "@sanity/icons";
import { format, parseISO } from "date-fns";
import { defineField, defineType } from "sanity";
import authorType from "./author";
/**
* This file is the schema definition for a post.
*
* Here you'll be able to edit the different fields that appear when you
* create or edit a post in the studio.
*
* Here you can see the different schema types that are available:
https://www.sanity.io/docs/schema-types
*/
export default defineType({
name: "post",
title: "Post",
icon: DocumentTextIcon,
type: "document",
fields: [
defineField({
name: "title",
title: "Title",
type: "string",
validation: (rule) => rule.required(),
}),
defineField({
name: "slug",
title: "Slug",
type: "slug",
description: "A slug is required for the post to show up in the preview",
options: {
source: "title",
maxLength: 96,
isUnique: (value, context) => context.defaultIsUnique(value, context),
},
validation: (rule) => rule.required(),
}),
defineField({
name: "content",
title: "Content",
type: "array",
of: [{ type: "block" }],
}),
defineField({
name: "excerpt",
title: "Excerpt",
type: "text",
}),
defineField({
name: "coverImage",
title: "Cover Image",
type: "image",
options: {
hotspot: true,
aiAssist: {
imageDescriptionField: "alt",
},
},
fields: [
{
name: "alt",
type: "string",
title: "Alternative text",
description: "Important for SEO and accessiblity.",
validation: (rule) => {
return rule.custom((alt, context) => {
if ((context.document?.coverImage as any)?.asset?._ref && !alt) {
return "Required";
}
return true;
});
},
},
],
validation: (rule) => rule.required(),
}),
defineField({
name: "date",
title: "Date",
type: "datetime",
initialValue: () => new Date().toISOString(),
}),
defineField({
name: "author",
title: "Author",
type: "reference",
to: [{ type: authorType.name }],
}),
],
preview: {
select: {
title: "title",
author: "author.name",
date: "date",
media: "coverImage",
},
prepare({ title, media, author, date }) {
const subtitles = [
author && `by ${author}`,
date && `on ${format(parseISO(date), "LLL d, yyyy")}`,
].filter(Boolean);
return { title, media, subtitle: subtitles.join(" ") };
},
},
});
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