payload

What this skill does

# Payload Application Development

Payload is a Next.js native CMS with TypeScript-first architecture, providing admin panel, database management, REST/GraphQL APIs, authentication, and file storage.

## Quick Reference

| Task                     | Solution                                  | Details                                                                                                                          |
| ------------------------ | ----------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------- |
| Auto-generate slugs      | `slugField()`                             | [FIELDS.md#slug-field-helper](reference/FIELDS.md#slug-field-helper)                                                             |
| Restrict content by user | Access control with query                 | [ACCESS-CONTROL.md#row-level-security-with-complex-queries](reference/ACCESS-CONTROL.md#row-level-security-with-complex-queries) |
| Local API user ops       | `user` + `overrideAccess: false`          | [QUERIES.md#access-control-in-local-api](reference/QUERIES.md#access-control-in-local-api)                                       |
| Draft/publish workflow   | `versions: { drafts: true }`              | [COLLECTIONS.md#versioning--drafts](reference/COLLECTIONS.md#versioning--drafts)                                                 |
| Computed fields          | `virtual: true` with afterRead            | [FIELDS.md#virtual-fields](reference/FIELDS.md#virtual-fields)                                                                   |
| Conditional fields       | `admin.condition`                         | [FIELDS.md#conditional-fields](reference/FIELDS.md#conditional-fields)                                                           |
| Custom field validation  | `validate` function                       | [FIELDS.md#text-field](reference/FIELDS.md#text-field)                                                                           |
| Filter relationship list | `filterOptions` on field                  | [FIELDS.md#relationship](reference/FIELDS.md#relationship)                                                                       |
| Select specific fields   | `select` parameter                        | [QUERIES.md#local-api](reference/QUERIES.md#local-api)                                                                           |
| Auto-set author/dates    | beforeChange hook                         | [HOOKS.md#collection-hooks](reference/HOOKS.md#collection-hooks)                                                                 |
| Prevent hook loops       | `req.context` check                       | [HOOKS.md#hook-context](reference/HOOKS.md#hook-context)                                                                         |
| Cascading deletes        | beforeDelete hook                         | [HOOKS.md#collection-hooks](reference/HOOKS.md#collection-hooks)                                                                 |
| Geospatial queries       | `point` field with `near`/`within`        | [FIELDS.md#point-geolocation](reference/FIELDS.md#point-geolocation)                                                             |
| Reverse relationships    | `join` field type                         | [FIELDS.md#join-fields](reference/FIELDS.md#join-fields)                                                                         |
| Next.js revalidation     | Context control in afterChange            | [HOOKS.md#nextjs-revalidation-with-context-control](reference/HOOKS.md#nextjs-revalidation-with-context-control)                 |
| Query by relationship    | Nested property syntax                    | [QUERIES.md#nested-properties](reference/QUERIES.md#nested-properties)                                                           |
| Complex queries          | AND/OR logic                              | [QUERIES.md#andor-logic](reference/QUERIES.md#andor-logic)                                                                       |
| Transactions             | Pass `req` to operations                  | [ADAPTERS.md#threading-req-through-operations](reference/ADAPTERS.md#threading-req-through-operations)                           |
| Background jobs          | Jobs queue with tasks                     | [ADVANCED.md#jobs-queue](reference/ADVANCED.md#jobs-queue)                                                                       |
| Custom API routes        | Collection custom endpoints               | [ADVANCED.md#custom-endpoints](reference/ADVANCED.md#custom-endpoints)                                                           |
| Cloud storage            | Storage adapter plugins                   | [ADAPTERS.md#storage-adapters](reference/ADAPTERS.md#storage-adapters)                                                           |
| Multi-language           | `localization` config + `localized: true` | [ADVANCED.md#localization](reference/ADVANCED.md#localization)                                                                   |
| Create plugin            | `(options) => (config) => Config`         | [PLUGIN-DEVELOPMENT.md#plugin-architecture](reference/PLUGIN-DEVELOPMENT.md#plugin-architecture)                                 |
| Plugin package setup     | Package structure with SWC                | [PLUGIN-DEVELOPMENT.md#plugin-package-structure](reference/PLUGIN-DEVELOPMENT.md#plugin-package-structure)                       |
| Add fields to collection | Map collections, spread fields            | [PLUGIN-DEVELOPMENT.md#adding-fields-to-collections](reference/PLUGIN-DEVELOPMENT.md#adding-fields-to-collections)               |
| Plugin hooks             | Preserve existing hooks in array          | [PLUGIN-DEVELOPMENT.md#adding-hooks](reference/PLUGIN-DEVELOPMENT.md#adding-hooks)                                               |
| Check field type         | Type guard functions                      | [FIELD-TYPE-GUARDS.md](reference/FIELD-TYPE-GUARDS.md)                                                                           |

## Quick Start

```bash
npx create-payload-app@latest my-app
cd my-app
pnpm dev
```

### Minimal Config

```ts
import { buildConfig } from 'payload'
import { mongooseAdapter } from '@payloadcms/db-mongodb'
import { lexicalEditor } from '@payloadcms/richtext-lexical'
import path from 'path'
import { fileURLToPath } from 'url'

const filename = fileURLToPath(import.meta.url)
const dirname = path.dirname(filename)

export default buildConfig({
  admin: {
    user: 'users',
    importMap: {
      baseDir: path.resolve(dirname),
    },
  },
  collections: [Users, Media],
  editor: lexicalEditor(),
  secret: process.env.PAYLOAD_SECRET,
  typescript: {
    outputFile: path.resolve(dirname, 'payload-types.ts'),
  },
  db: mongooseAdapter({
    url: process.env.DATABASE_URL,
  }),
})
```

## Essential Patterns

### Basic Collection

```ts
import type { CollectionConfig } from 'payload'

export const Posts: CollectionConfig = {
  slug: 'posts',
  admin: {
    useAsTitle: 'title',
    defaultColumns: ['title', 'author', 'status', 'createdAt'],
  },
  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' },
  ],
  timestamps: true,
}
```

For more collection patterns (auth, upload, drafts, live preview), see [COLLECTIONS.md](reference/COLLECTIONS.md).

### Common Fields

```ts
// Text field
{ name: 'title', type: 'text', required: true }

// Relationship
{ name: 'author', type: 'relationship', relationTo: 'users', required: true }

// Rich text
{ name: 'content', type: 'richText', required: true }

// Select
{ name: 'status', type: 'select', options: ['draft', 'published'], defaultValue: 'draft' }

// Upload
{ name: 'image', type: 'upload', relationTo: 'media' }
```