Payloadcms Ops

Payload CMS Operations

Authoritative reference for Payload 3.x — the Next.js-native, TypeScript-first headless CMS. Payload 3 installs into a Next.js (App Router) app and gives you an auto-generated admin panel, REST + GraphQL APIs, a typed Local API, authentication, access control, file storage, and live preview — one open-source TypeScript codebase.

> Version note (verified against payloadcms.com/docs, 2026-06): Payload 3 is the Next.js fullstack framework — there is no standalone Express server anymore. The config lives at src/payload.config.ts; Payload mounts into the Next App Router via the installed (payload) route group. Don't ship Payload 2.x "standalone Express app" guidance.

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Architecture at a glance

| Piece | What it is | |-------|-----------| | payload.config.ts | Single source of truth: collections, globals, db adapter, plugins, admin, auth | | Collections | Repeatable document groups (Posts, Users, Media) — the core building block | | Globals | Singletons (one document) — site settings, header/footer nav | | Fields | Compose document shape; also drive admin UI, validation, access | | Local API | Typed, in-process data access (payload.find(...)) — no HTTP, runs server-side | | REST / GraphQL | Auto-generated HTTP APIs over the same collections | | Database adapter | @payloadcms/db-postgres, db-mongodb, or db-sqlite | | Storage adapter | Local disk (dev) or S3/R2/etc. for uploads |

Where it lives in a Next.js app

src/
├── payload.config.ts          # the config — collections, globals, db, plugins
├── collections/               # one file per CollectionConfig
│   ├── Users.ts
│   ├── Posts.ts
│   └── Media.ts
├── globals/                   # GlobalConfig files
└── app/
    ├── (payload)/             # Payload's admin + API route group (generated)
    └── (frontend)/            # your Next.js front end — uses the Local API

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Collections — the core shape

import type { CollectionConfig } from 'payload'

export const Posts: CollectionConfig = {
  slug: 'posts',                          // required, URL-safe identifier
  admin: { useAsTitle: 'title', defaultColumns: ['title', 'status'] },
  access: {                               // see access-control reference
    read: () => true,
    create: ({ req }) => Boolean(req.user),
    update: ({ req }) => Boolean(req.user),
    delete: ({ req }) => req.user?.role === 'admin',
  },
  versions: { drafts: true },             // draft/publish + revision history
  hooks: { /* lifecycle — see hooks reference */ },
  fields: [
    { name: 'title', type: 'text', required: true },
    { name: 'slug', type: 'text', unique: true, index: true },
    { name: 'content', type: 'richText' },
    { name: 'author', type: 'relationship', relationTo: 'users' },
  ],
}

| Collection property | Purpose | |---------------------|---------| | slug | Required identifier (and REST/GraphQL route base) | | fields | Required — document shape + UI + validation | | access | Per-operation authorization (read/create/update/delete) | | hooks | Lifecycle entry points (before/after change/read/delete) | | admin | Admin-panel UI (title field, columns, components, groups) | | auth | Turns the collection into an auth collection (e.g. Users) | | upload | Makes it an upload collection (file storage, image sizes) | | versions | Drafts + revision history |

Globals vs Collections

> "If your Collection is only ever meant to contain a single Document, consider using a Global instead."

Globals (GlobalConfig) are singletons — site settings, main nav. Same fields/access/hooks/admin surface, one document.

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Fields (the 80/20)

| Type | Use for | |------|---------| | text, textarea, number, email, date, checkbox | Scalars | | richText | Lexical-based rich content | | select, radio | Enumerations | | relationship | Link to other collections (relationTo, hasMany) | | upload | Reference an upload collection (media) | | array | Repeatable sub-field groups | | blocks | Flexible content — choose from defined block types per row | | group | Nested namespaced fields | | row, collapsible, tabs | Admin layout only (no data nesting except tabs with name) | | json, code | Raw structured/code data |

Every field can carry access, hooks, validate, admin.condition (conditional display), and localized: true for i18n. See references/hooks-and-fields.md.

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Access control — least privilege by default

Access functions return boolean or a query constraint (row-level filtering). They run for Local API, REST, and GraphQL uniformly.

access: {
  // boolean: can this user perform the op at all?
  delete: ({ req }) => req.user?.role === 'admin',

  // query constraint: WHICH documents can they read? (row-level)
  read: ({ req }) => {
    if (req.user?.role === 'admin') return true
    return { author: { equals: req.user?.id } }  // only their own
  },
}

• Collection-level (read/create/update/delete) and field-level (field.access.read/create/update) both exist — use field-level to hide/lock individual fields.
• Never bypass access control in custom endpoints. Use req context; don't hand-roll DB calls that skip it.
• The Local API can run with overrideAccess: true for trusted server code — use deliberately, not by default.

Full patterns (RBAC, multi-tenant isolation, field-level): references/access-control.md.

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Hooks — lifecycle entry points

hooks: {
  beforeChange: [({ data, req, operation }) => { /* mutate before save */ return data }],
  afterChange:  [({ doc, req, operation }) => { /* side effects: revalidate, notify */ return doc }],
  beforeRead:   [/* ... */],
  afterRead:    [/* shape outgoing doc */],
  beforeDelete: [/* ... */],
  afterDelete:  [/* cleanup */],
}

Common use: in afterChange, call Next.js revalidatePath() / revalidateTag() to bust the front-end cache on publish. Full hook catalog (collection, field, global, auth hooks): references/hooks-and-fields.md.

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Local API (the Next.js superpower)

In server components / route handlers, fetch data in-process — no HTTP round trip, fully typed:

import { getPayload } from 'payload'
import config from '@payload-config'

const payload = await getPayload({ config })

const { docs } = await payload.find({
  collection: 'posts',
  where: { status: { equals: 'published' } },
  depth: 1,             // auto-populate relationships one level deep
  limit: 10,
})

payload.find / findByID / create / update / delete / findGlobal mirror the REST surface. Access control still applies unless overrideAccess: true.

Caching in Next.js

• Wrap Local API reads in unstable_cache (or cache) with tags, then invalidate from an afterChange hook via revalidateTag.
• depth controls relationship population — keep it low to avoid over-fetching.

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Decision tables

Database adapter

| Choice | Pick when | |--------|-----------| | Postgres (db-postgres) | Relational data, SQL reporting, Vercel Postgres/Neon/Supabase; migrations matter | | MongoDB (db-mongodb) | Document-shaped data, flexible schema, existing Mongo infra | | SQLite (db-sqlite) | Local/edge, small footprint, simple deploys |

Storage adapter

| Choice | Pick when | |--------|-----------| | Local disk | Dev only — not for serverless (ephemeral FS) | | S3 / R2 (@payloadcms/storage-s3) | Production; put a CDN (CloudFront/Cloudflare) in front; signed URLs for private media; handle 403 on the frontend |

Multi-tenancy

| Approach | Pick when | |----------|-----------| | @payloadcms/plugin-multi-tenant | Standard tenant isolation by a tenant field | | Custom access constraints | Bespoke isolation rules; enforce via row-level read/update constraints |

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Common gotchas

| Gotcha | Why | Fix | |--------|-----|-----| | Users see data they shouldn't | read access returns true (no row filter) | Return a query constraint from read, not just true | | Local disk uploads vanish on Vercel | Serverless FS is ephemeral | Use S3/R2 storage adapter | | Stale front-end after publish | Next.js caches the read | revalidateTag/Path in an afterChange hook | | S3 signed URL 403s on frontend | URLs expire | Handle 403 gracefully; refresh URL | | Over-deep relationship fetch | High depth populates everything | Keep depth minimal; populate explicitly | | Custom endpoint leaks data | Bypassed access control | Go through Local API with access on; reserve overrideAccess for trusted paths | | Env not validated | Misconfig fails at runtime | Validate env (zod) at boot | | No real-time collab | Payload has no built-in CRDT | Pair with Liveblocks/Yjs; Payload stays source of truth for final state |

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Assets

| File | Use | |------|-----| | assets/collection.config.template.ts | Heavily commented Payload 3 CollectionConfig starter (access + hooks + fields), with adapt-points marked |

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See also

• typescript-ops — typing config, generated types (payload generate:types)
• react-ops — custom admin components, server components consuming the Local API
• api-design-ops — REST/GraphQL surface design, pagination, versioning
• auth-ops — auth collections, sessions/JWT, RBAC/ABAC patterns behind access control

Key external resources

• What is Payload
• Collections · Fields
• Access control
• Hooks
• Local API
• Database · Storage adapters
• Multi-tenant plugin

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: 0xDarkMatter
• Source: 0xDarkMatter/claude-mods
• License: MIT
• Homepage: https://github.com/0xDarkMatter/claude-mods#readme

Install and usage instructions live in the source repository linked above.