### What?
There were a couple issues with the implementation within the example
when using postgres.
- `ensureUniqueUsername` tenant was being extracted incorrectly, should
not constrain query unless it was present
- `ensureUniqueSlug` was querying by NaN when tenant was not present on
data or originalDoc
- `users` read access was not correctly extracting the tenant id in the
correct type depending on DB
Fixes https://github.com/payloadcms/payload/issues/11484
### Multi Tenant Plugin
This PR adds a `@payloadcms/plugin-multi-tenant` package. The goal is to
consolidate a source of truth for multi-tenancy. Currently we are
maintaining different implementations for clients, users in discord and
our examples repo. When updates or new paradigms arise we need to
communicate this with everyone and update code examples which is hard to
maintain.
### What does it do?
- adds a tenant selector to the sidebar, above the nav links
- adds a hidden tenant field to every collection that you specify
- adds an array field to your users collection, allowing you to assign
users to tenants
- by default combines the access control (to enabled collections) that
you define, with access control based on the tenants assigned to user on
the request
- by default adds a baseListFilter that filters the documents shown in
the list view with the selected tenant in the admin panel
### What does it not do?
- it does not implement multi-tenancy for your frontend. You will need
to query data for specific tenants to build your website/application
- it does not add a tenants collection, you **NEED** to add a tenants
collection, where you can define what types of fields you would like on
it
### The plugin config
Most of the options listed below are _optional_, but it is easier to
just lay out all of the configuration options.
**TS Type**
```ts
type MultiTenantPluginConfig<ConfigTypes = unknown> = {
/**
* After a tenant is deleted, the plugin will attempt to clean up related documents
* - removing documents with the tenant ID
* - removing the tenant from users
*
* @default true
*/
cleanupAfterTenantDelete?: boolean
/**
* Automatically
*/
collections: {
[key in CollectionSlug]?: {
/**
* Set to `true` if you want the collection to behave as a global
*
* @default false
*/
isGlobal?: boolean
/**
* Set to `false` if you want to manually apply the baseListFilter
*
* @default true
*/
useBaseListFilter?: boolean
/**
* Set to `false` if you want to handle collection access manually without the multi-tenant constraints applied
*
* @default true
*/
useTenantAccess?: boolean
}
}
/**
* Enables debug mode
* - Makes the tenant field visible in the admin UI within applicable collections
*
* @default false
*/
debug?: boolean
/**
* Enables the multi-tenant plugin
*
* @default true
*/
enabled?: boolean
/**
* Field configuration for the field added to all tenant enabled collections
*/
tenantField?: {
access?: RelationshipField['access']
/**
* The name of the field added to all tenant enabled collections
*
* @default 'tenant'
*/
name?: string
}
/**
* Field configuration for the field added to the users collection
*
* If `includeDefaultField` is `false`, you must include the field on your users collection manually
* This is useful if you want to customize the field or place the field in a specific location
*/
tenantsArrayField?:
| {
/**
* Access configuration for the array field
*/
arrayFieldAccess?: ArrayField['access']
/**
* When `includeDefaultField` is `true`, the field will be added to the users collection automatically
*/
includeDefaultField?: true
/**
* Additional fields to include on the tenants array field
*/
rowFields?: Field[]
/**
* Access configuration for the tenant field
*/
tenantFieldAccess?: RelationshipField['access']
}
| {
arrayFieldAccess?: never
/**
* When `includeDefaultField` is `false`, you must include the field on your users collection manually
*/
includeDefaultField?: false
rowFields?: never
tenantFieldAccess?: never
}
/**
* The slug for the tenant collection
*
* @default 'tenants'
*/
tenantsSlug?: string
/**
* Function that determines if a user has access to _all_ tenants
*
* Useful for super-admin type users
*/
userHasAccessToAllTenants?: (
user: ConfigTypes extends { user: User } ? ConfigTypes['user'] : User,
) => boolean
}
```
**Example usage**
```ts
import type { Config } from './payload-types'
import { buildConfig } from 'payload'
export default buildConfig({
plugins: [
multiTenantPlugin<Config>({
collections: {
pages: {},
},
userHasAccessToAllTenants: (user) => isSuperAdmin(user),
}),
],
})
```
### How to configure Collections as Globals for multi-tenant
When using multi-tenant, globals need to actually be configured as
collections so the content can be specific per tenant.
To do that, you can mark a collection with `isGlobal` and it will behave
like a global and users will not see the list view.
```ts
multiTenantPlugin({
collections: {
navigation: {
isGlobal: true,
},
},
})
```
Adds the ability to create a project using an existing in the Payload
repo example through `create-payload-app`:
For example:
`pnpx create-payload-app --example custom-server` - creates a project
from the
[custom-server](https://github.com/payloadcms/payload/tree/main/examples/custom-server)
example.
This is much easier and faster then downloading the whole repo and
copying the example to another folder.
Note that we don't configure the payload config with the storage / DB
adapter there because examples can be very specific.
In effort to keep the Examples Directory as easy to navigate as
possible, and to keep the Payload Monorepo only as verbose as it needs
to be, we need to remove all alternatives from the Examples Directory.
This includes setups that interact with Payload from a standalone
server, keeping only the Payload recommended "combined" Next.js +
Payload setups. This will also be applied to all other examples that use
this setup, i.e. draft preview, live preview, etc.
- Adds optional tenant-based cookie handling based by domain (commented
out to leave functionality out by default)
- Removes 2.0 multi-tenant example
- Updates `examples/multi-tenant-single-domain` -->
`examples/multi-tenant`
