Collections

Collections are defined in src/cms/collections/ and registered in src/cms/cms.config.ts. Each collection becomes a database table, a set of TypeScript types, Zod validators, and an admin UI.

Basic Collection

src/cms/collections/posts.ts

import { defineCollection, fields } from "../core/define";

export default defineCollection({
  slug: "posts",
  labels: { singular: "Post", plural: "Posts" },
  timestamps: true,
  drafts: true,
  versions: { max: 20 },
  fields: {
    title: fields.text({ required: true }),
    slug: fields.slug({ from: "title", unique: true, admin: { position: "sidebar" } }),
    body: fields.richText(),
    author: fields.relation({ collection: "authors", admin: { position: "sidebar" } }),
  },
});

Register it in src/cms/cms.config.ts:

import { defineConfig } from "./core/define";
import posts from "./collections/posts";

export default defineConfig({
  database: { dialect: "sqlite" },
  collections: [posts],
});

Collection Options

Option	Type	Description
slug	string	URL-safe identifier, used as table name prefix
labels	{ singular, plural }	Display names in admin
singleton	boolean	Single document (e.g., front page)
timestamps	boolean	Auto _createdAt / _updatedAt
drafts	boolean	Enable draft/published status
versions	{ max: number }	Keep version snapshots
pathPrefix	string	URL prefix for public pages (e.g., "blog")
preview	boolean | string	Enable preview link (string for static URL)
labelField	string	Field used as document display name
views	object	List column config (see Admin UI)
auth	boolean	Enable login/session handling

Label Field

By default, the admin uses the title field as the document display name (in relation selects, DataTable, breadcrumbs). If your collection doesn’t have a title field, or you want a different field, set labelField:

defineCollection({
  slug: "authors",
  labels: { singular: "Author", plural: "Authors" },
  labelField: "name",
  fields: {
    name: fields.text({ required: true }),
    title: fields.text(), // work title, not the display name
  },
});

Fallback chain: labelField → field named title → field named name → first text field.

Singletons

defineCollection({
  slug: "front-page",
  labels: { singular: "Front Page", plural: "Front Page" },
  singleton: true,
  fields: { ... },
})

Singletons show under “Singles” in the sidebar. One document per collection.

Internationalization

Enable locales in cms.config.ts and mark fields as translatable:

src/cms/cms.config.ts

export default defineConfig({
  locales: {
    default: "en",
    supported: ["en", "fi"],
  },
  collections: [posts],
});

src/cms/collections/posts.ts

fields: {
  title: fields.text({ translatable: true }),
  body: fields.richText({ translatable: true }),
  category: fields.select({ options: ["tech", "design"] }), // not translated
}

Translatable fields get a separate _translations table. Non-translatable fields stay on the main table. The admin shows a language switcher on edit pages.