feat: @payloadcms/db-vercel-postgres adapter (#7806)

Dedicated adapter for Vercel Postgres

- Uses the `@vercel/postgres` package under the hood.
- No `pg` dependency, speeds up invocation
- Includes refactoring all base postgres functionality into a
`BasePostgresAdapter` type, which will ease implementation of [other
adapters supported by
drizzle-orm](https://orm.drizzle.team/docs/get-started-postgresql)

## Usage

```ts
import { buildConfig } from 'payload'
import { vercelPostgresAdapter } from '@payloadcms/db-vercel-postgres'

export default buildConfig({
  db: vercelPostgresAdapter({
    pool: {
      connectionString: process.env.DATABASE_URI,
    },
  }),
  // ...rest of config
})
```

### Automatic Connection String Detection

Have Vercel automatically detect from environment variable (typically
`process.env.POSTGRES_URL`)

```ts
export default buildConfig({
  db: postgresAdapter(),
  // ...rest of config
})
```

package.json

@@ -16,6 +16,7 @@
     "build:db-mongodb": "turbo build --filter db-mongodb",
     "build:db-postgres": "turbo build --filter db-postgres",
     "build:db-sqlite": "turbo build --filter db-sqlite",
+    "build:db-vercel-postgres": "turbo build --filter db-vercel-postgres",
     "build:drizzle": "turbo build --filter drizzle",
     "build:email-nodemailer": "turbo build --filter email-nodemailer",
     "build:email-resend": "turbo build --filter email-resend",
@@ -58,6 +59,7 @@
     "dev:generate-importmap": "pnpm runts ./test/generateImportMap.ts",
     "dev:generate-types": "pnpm runts ./test/generateTypes.ts",
     "dev:postgres": "cross-env PAYLOAD_DATABASE=postgres pnpm runts ./test/dev.ts",
+    "dev:vercel-postgres": "cross-env PAYLOAD_DATABASE=vercel-postgres pnpm runts ./test/dev.ts",
     "devsafe": "node ./scripts/delete-recursively.js '**/.next' && pnpm dev",
     "docker:restart": "pnpm docker:stop --remove-orphans && pnpm docker:start",
     "docker:start": "docker compose -f packages/plugin-cloud-storage/docker-compose.yml up -d",

packages/db-mongodb/src/index.ts

@@ -182,6 +182,7 @@ export function mongooseAdapter({
       init,
       migrateFresh,
       migrationDir,
+      packageName: '@payloadcms/db-mongodb',
       payload,
       prodMigrations,
       queryDrafts,

packages/db-postgres/src/index.ts

@@ -139,6 +139,7 @@ export function postgresAdapter(args: Args): DatabaseAdapterObj<PostgresAdapter>
       migrateReset,
       migrateStatus,
       migrationDir,
+      packageName: '@payloadcms/db-postgres',
       payload,
       queryDrafts,
       rejectInitializing,

packages/db-sqlite/src/index.ts

@@ -140,6 +140,7 @@ export function sqliteAdapter(args: Args): DatabaseAdapterObj<SQLiteAdapter> {
       migrateReset,
       migrateStatus,
       migrationDir,
+      packageName: '@payloadcms/db-sqlite',
       payload,
       queryDrafts,
       rejectInitializing,

packages/db-vercel-postgres/.gitignore

@@ -0,0 +1 @@
+/migrations

packages/db-vercel-postgres/.prettierignore

@@ -0,0 +1,10 @@
+.tmp
+**/.git
+**/.hg
+**/.pnp.*
+**/.svn
+**/.yarn/**
+**/build
+**/dist/**
+**/node_modules
+**/temp

packages/db-vercel-postgres/.swcrc

@@ -0,0 +1,15 @@
+{
+  "$schema": "https://json.schemastore.org/swcrc",
+  "sourceMaps": true,
+  "jsc": {
+    "target": "esnext",
+    "parser": {
+      "syntax": "typescript",
+      "tsx": true,
+      "dts": true
+    }
+  },
+  "module": {
+    "type": "es6"
+  }
+}

packages/db-vercel-postgres/README.md

@@ -0,0 +1,43 @@
+# Payload Postgres Adapter
+
+[Vercel Postgres](https://vercel.com/docs/storage/vercel-postgres) adapter for [Payload](https://payloadcms.com).
+
+- [Main Repository](https://github.com/payloadcms/payload)
+- [Payload Docs](https://payloadcms.com/docs)
+
+## Installation
+
+```bash
+npm install @payloadcms/db-vercel-postgres
+```
+
+## Usage
+
+### Explicit Connection String
+
+```ts
+import { buildConfig } from 'payload'
+import { vercelPostgresAdapter } from '@payloadcms/db-vercel-postgres'
+
+export default buildConfig({
+  db: vercelPostgresAdapter({
+    pool: {
+      connectionString: process.env.DATABASE_URI,
+    },
+  }),
+  // ...rest of config
+})
+```
+
+### Automatic Connection String Detection
+
+Have Vercel automatically detect from environment variable (typically `process.env.POSTGRES_URL`)
+
+```ts
+export default buildConfig({
+  db: postgresAdapter(),
+  // ...rest of config
+})
+```
+
+More detailed usage can be found in the [Payload Docs](https://payloadcms.com/docs/configuration/overview).

packages/db-vercel-postgres/eslint.config.js

@@ -0,0 +1,20 @@
+import { rootEslintConfig, rootParserOptions } from '../../eslint.config.js'
+
+/** @typedef {import('eslint').Linter.FlatConfig} */
+let FlatConfig
+
+/** @type {FlatConfig[]} */
+export const index = [
+  ...rootEslintConfig,
+  {
+    languageOptions: {
+      parserOptions: {
+        project: './tsconfig.json',
+        tsconfigDirName: import.meta.dirname,
+        ...rootParserOptions,
+      },
+    },
+  },
+]
+
+export default index

packages/db-vercel-postgres/package.json

@@ -0,0 +1,89 @@
+{
+  "name": "@payloadcms/db-vercel-postgres",
+  "version": "3.0.0-beta.84",
+  "description": "Vercel Postgres adapter for Payload",
+  "homepage": "https://payloadcms.com",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/payloadcms/payload.git",
+    "directory": "packages/db-vercel-postgres"
+  },
+  "license": "MIT",
+  "author": "Payload <dev@payloadcms.com> (https://payloadcms.com)",
+  "type": "module",
+  "exports": {
+    ".": {
+      "import": "./src/index.ts",
+      "types": "./src/index.ts",
+      "default": "./src/index.ts"
+    },
+    "./types": {
+      "import": "./src/types.ts",
+      "types": "./src/types.ts",
+      "default": "./src/types.ts"
+    },
+    "./migration-utils": {
+      "import": "./src/exports/migration-utils.ts",
+      "types": "./src/exports/migration-utils.ts",
+      "default": "./src/exports/migration-utils.ts"
+    }
+  },
+  "main": "./src/index.ts",
+  "types": "./src/types.ts",
+  "files": [
+    "dist",
+    "mock.js"
+  ],
+  "scripts": {
+    "build": "rimraf .dist && rimraf tsconfig.tsbuildinfo  && pnpm build:types && pnpm build:swc && pnpm build:esbuild && pnpm renamePredefinedMigrations",
+    "build:esbuild": "echo skipping esbuild",
+    "build:swc": "swc ./src -d ./dist --config-file .swcrc --strip-leading-paths",
+    "build:types": "tsc --emitDeclarationOnly --outDir dist",
+    "clean": "rimraf {dist,*.tsbuildinfo}",
+    "prepack": "pnpm clean && pnpm turbo build",
+    "prepublishOnly": "pnpm clean && pnpm turbo build",
+    "renamePredefinedMigrations": "node --no-deprecation --import @swc-node/register/esm-register ./scripts/renamePredefinedMigrations.ts"
+  },
+  "dependencies": {
+    "@payloadcms/drizzle": "workspace:*",
+    "@vercel/postgres": "^0.9.0",
+    "console-table-printer": "2.11.2",
+    "drizzle-kit": "0.23.2-df9e596",
+    "drizzle-orm": "0.32.1",
+    "prompts": "2.4.2",
+    "to-snake-case": "1.0.0",
+    "uuid": "10.0.0"
+  },
+  "devDependencies": {
+    "@hyrious/esbuild-plugin-commonjs": "^0.2.4",
+    "@payloadcms/eslint-config": "workspace:*",
+    "@types/pg": "8.10.2",
+    "@types/to-snake-case": "1.0.0",
+    "esbuild": "0.23.0",
+    "payload": "workspace:*"
+  },
+  "peerDependencies": {
+    "payload": "workspace:*"
+  },
+  "publishConfig": {
+    "exports": {
+      ".": {
+        "import": "./dist/index.js",
+        "types": "./dist/index.d.ts",
+        "default": "./dist/index.js"
+      },
+      "./types": {
+        "import": "./dist/types.js",
+        "types": "./dist/types.d.ts",
+        "default": "./dist/types.js"
+      },
+      "./migration-utils": {
+        "import": "./dist/exports/migration-utils.js",
+        "types": "./dist/exports/migration-utils.d.ts",
+        "default": "./dist/exports/migration-utils.js"
+      }
+    },
+    "main": "./dist/index.js",
+    "types": "./dist/index.d.ts"
+  }
+}

packages/db-vercel-postgres/relationships-v2-v3.mjs

@@ -0,0 +1,13 @@
+const imports = `import { migratePostgresV2toV3 } from '@payloadcms/migratePostgresV2toV3'`
+const up = `   await migratePostgresV2toV3({
+        // enables logging of changes that will be made to the database
+        debug: false,
+        // skips calls that modify schema or data
+        dryRun: false,
+        payload,
+        req,
+        })
+`
+export { imports, up }
+
+//# sourceMappingURL=relationships-v2-v3.js.map

packages/db-vercel-postgres/scripts/renamePredefinedMigrations.ts

@@ -0,0 +1,19 @@
+import fs from 'fs'
+import path from 'path'
+
+/**
+ * Changes built .js files to .mjs to for ESM imports
+ */
+const rename = () => {
+  fs.readdirSync(path.resolve('./dist/predefinedMigrations'))
+    .filter((f) => {
+      return f.endsWith('.js')
+    })
+    .forEach((file) => {
+      const newPath = path.join('./dist/predefinedMigrations', file)
+      fs.renameSync(newPath, newPath.replace('.js', '.mjs'))
+    })
+  console.log('done')
+}
+
+rename()

packages/db-vercel-postgres/src/connect.ts

@@ -0,0 +1,61 @@
+import type { DrizzleAdapter } from '@payloadcms/drizzle/types'
+import type { Connect } from 'payload'
+
+import { pushDevSchema } from '@payloadcms/drizzle'
+import { VercelPool, sql } from '@vercel/postgres'
+import { drizzle } from 'drizzle-orm/node-postgres'
+
+import type { VercelPostgresAdapter } from './types.js'
+
+export const connect: Connect = async function connect(
+  this: VercelPostgresAdapter,
+  options = {
+    hotReload: false,
+  },
+) {
+  const { hotReload } = options
+
+  this.schema = {
+    pgSchema: this.pgSchema,
+    ...this.tables,
+    ...this.relations,
+    ...this.enums,
+  }
+
+  try {
+    const logger = this.logger || false
+    // Passed the poolOptions if provided,
+    // else have vercel/postgres detect the connection string from the environment
+    this.drizzle = drizzle(this.poolOptions ? new VercelPool(this.poolOptions) : sql, {
+      logger,
+      schema: this.schema,
+    })
+
+    if (!hotReload) {
+      if (process.env.PAYLOAD_DROP_DATABASE === 'true') {
+        this.payload.logger.info(`---- DROPPING TABLES SCHEMA(${this.schemaName || 'public'}) ----`)
+        await this.dropDatabase({ adapter: this })
+        this.payload.logger.info('---- DROPPED TABLES ----')
+      }
+    }
+  } catch (err) {
+    this.payload.logger.error(`Error: cannot connect to Postgres. Details: ${err.message}`, err)
+    if (typeof this.rejectInitializing === 'function') this.rejectInitializing()
+    process.exit(1)
+  }
+
+  // Only push schema if not in production
+  if (
+    process.env.NODE_ENV !== 'production' &&
+    process.env.PAYLOAD_MIGRATING !== 'true' &&
+    this.push !== false
+  ) {
+    await pushDevSchema(this as unknown as DrizzleAdapter)
+  }
+
+  if (typeof this.resolveInitializing === 'function') this.resolveInitializing()
+
+  if (process.env.NODE_ENV === 'production' && this.prodMigrations) {
+    await this.migrate({ migrations: this.prodMigrations })
+  }
+}

packages/db-vercel-postgres/src/exports/migration-utils.ts

@@ -0,0 +1 @@
+export { migratePostgresV2toV3 } from '../predefinedMigrations/v2-v3/index.js'

packages/db-vercel-postgres/src/index.ts

@@ -0,0 +1,163 @@
+import type { DatabaseAdapterObj, Payload } from 'payload'
+
+import {
+  beginTransaction,
+  commitTransaction,
+  count,
+  create,
+  createGlobal,
+  createGlobalVersion,
+  createVersion,
+  deleteMany,
+  deleteOne,
+  deleteVersions,
+  destroy,
+  find,
+  findGlobal,
+  findGlobalVersions,
+  findMigrationDir,
+  findOne,
+  findVersions,
+  migrate,
+  migrateDown,
+  migrateFresh,
+  migrateRefresh,
+  migrateReset,
+  migrateStatus,
+  operatorMap,
+  queryDrafts,
+  rollbackTransaction,
+  updateGlobal,
+  updateGlobalVersion,
+  updateOne,
+  updateVersion,
+} from '@payloadcms/drizzle'
+import {
+  convertPathToJSONTraversal,
+  countDistinct,
+  createJSONQuery,
+  createMigration,
+  defaultDrizzleSnapshot,
+  deleteWhere,
+  dropDatabase,
+  execute,
+  getMigrationTemplate,
+  init,
+  insert,
+  requireDrizzleKit,
+} from '@payloadcms/drizzle/postgres'
+import { pgEnum, pgSchema, pgTable } from 'drizzle-orm/pg-core'
+import { createDatabaseAdapter } from 'payload'
+
+import type { Args, VercelPostgresAdapter } from './types.js'
+
+import { connect } from './connect.js'
+
+export function vercelPostgresAdapter(args: Args = {}): DatabaseAdapterObj<VercelPostgresAdapter> {
+  const postgresIDType = args.idType || 'serial'
+  const payloadIDType = postgresIDType === 'serial' ? 'number' : 'text'
+
+  function adapter({ payload }: { payload: Payload }) {
+    const migrationDir = findMigrationDir(args.migrationDir)
+    let resolveInitializing
+    let rejectInitializing
+    let adapterSchema: VercelPostgresAdapter['pgSchema']
+
+    const initializing = new Promise<void>((res, rej) => {
+      resolveInitializing = res
+      rejectInitializing = rej
+    })
+
+    if (args.schemaName) {
+      adapterSchema = pgSchema(args.schemaName)
+    } else {
+      adapterSchema = { enum: pgEnum, table: pgTable }
+    }
+
+    return createDatabaseAdapter<VercelPostgresAdapter>({
+      name: 'postgres',
+      defaultDrizzleSnapshot,
+      drizzle: undefined,
+      enums: {},
+      features: {
+        json: true,
+      },
+      fieldConstraints: {},
+      getMigrationTemplate,
+      idType: postgresIDType,
+      initializing,
+      localesSuffix: args.localesSuffix || '_locales',
+      logger: args.logger,
+      operators: operatorMap,
+      pgSchema: adapterSchema,
+      pool: undefined,
+      poolOptions: args.pool,
+      prodMigrations: args.prodMigrations,
+      push: args.push,
+      relations: {},
+      relationshipsSuffix: args.relationshipsSuffix || '_rels',
+      schema: {},
+      schemaName: args.schemaName,
+      sessions: {},
+      tableNameMap: new Map<string, string>(),
+      tables: {},
+      transactionOptions: args.transactionOptions || undefined,
+      versionsSuffix: args.versionsSuffix || '_v',
+
+      // DatabaseAdapter
+      beginTransaction: args.transactionOptions === false ? undefined : beginTransaction,
+      commitTransaction,
+      connect,
+      convertPathToJSONTraversal,
+      count,
+      countDistinct,
+      create,
+      createGlobal,
+      createGlobalVersion,
+      createJSONQuery,
+      createMigration,
+      createVersion,
+      defaultIDType: payloadIDType,
+      deleteMany,
+      deleteOne,
+      deleteVersions,
+      deleteWhere,
+      destroy,
+      dropDatabase,
+      execute,
+      find,
+      findGlobal,
+      findGlobalVersions,
+      findOne,
+      findVersions,
+      init,
+      insert,
+      migrate,
+      migrateDown,
+      migrateFresh,
+      migrateRefresh,
+      migrateReset,
+      migrateStatus,
+      migrationDir,
+      packageName: '@payloadcms/db-vercel-postgres',
+      payload,
+      queryDrafts,
+      rejectInitializing,
+      requireDrizzleKit,
+      resolveInitializing,
+      rollbackTransaction,
+      updateGlobal,
+      updateGlobalVersion,
+      updateOne,
+      updateVersion,
+    })
+  }
+
+  return {
+    defaultIDType: payloadIDType,
+    init: adapter,
+  }
+}
+
+export type { MigrateDownArgs, MigrateUpArgs } from '@payloadcms/drizzle/postgres'
+export { sql } from 'drizzle-orm'

packages/db-vercel-postgres/src/predefinedMigrations/relationships-v2-v3.ts

@@ -0,0 +1,10 @@
+const imports = `import { migratePostgresV2toV3 } from '@payloadcms/db-postgres/migration-utils'`
+const upSQL = `   await migratePostgresV2toV3({
+        // enables logging of changes that will be made to the database
+        debug: false,
+        payload,
+        req,
+        })
+`
+
+export { imports, upSQL }

packages/db-vercel-postgres/src/predefinedMigrations/v2-v3/fetchAndResave/index.ts

@@ -0,0 +1,237 @@
+import type { TransactionPg } from '@payloadcms/drizzle/types'
+import type { Field, Payload, PayloadRequest } from 'payload'
+
+import { upsertRow } from '@payloadcms/drizzle'
+
+import type { VercelPostgresAdapter } from '../../../types.js'
+import type { DocsToResave } from '../types.js'
+
+import { traverseFields } from './traverseFields.js'
+
+type Args = {
+  adapter: VercelPostgresAdapter
+  collectionSlug?: string
+  db: TransactionPg
+  debug: boolean
+  docsToResave: DocsToResave
+  fields: Field[]
+  globalSlug?: string
+  isVersions: boolean
+  payload: Payload
+  req: PayloadRequest
+  tableName: string
+}
+
+export const fetchAndResave = async ({
+  adapter,
+  collectionSlug,
+  db,
+  debug,
+  docsToResave,
+  fields,
+  globalSlug,
+  isVersions,
+  payload,
+  req,
+  tableName,
+}: Args) => {
+  for (const [id, rows] of Object.entries(docsToResave)) {
+    if (collectionSlug) {
+      const collectionConfig = payload.collections[collectionSlug].config
+
+      if (collectionConfig) {
+        if (isVersions) {
+          const doc = await payload.findVersionByID({
+            id,
+            collection: collectionSlug,
+            depth: 0,
+            fallbackLocale: null,
+            locale: 'all',
+            req,
+            showHiddenFields: true,
+          })
+
+          if (debug) {
+            payload.logger.info(
+              `The collection "${collectionConfig.slug}" version with ID ${id} will be migrated`,
+            )
+          }
+
+          traverseFields({
+            doc,
+            fields,
+            path: '',
+            rows,
+          })
+
+          try {
+            await upsertRow({
+              id: doc.id,
+              adapter,
+              data: doc,
+              db,
+              fields,
+              ignoreResult: true,
+              operation: 'update',
+              req,
+              tableName,
+            })
+          } catch (err) {
+            payload.logger.error(
+              `"${collectionConfig.slug}" version with ID ${doc.id} FAILED TO MIGRATE`,
+            )
+
+            throw err
+          }
+
+          if (debug) {
+            payload.logger.info(
+              `"${collectionConfig.slug}" version with ID ${doc.id} migrated successfully!`,
+            )
+          }
+        } else {
+          const doc = await payload.findByID({
+            id,
+            collection: collectionSlug,
+            depth: 0,
+            fallbackLocale: null,
+            locale: 'all',
+            req,
+            showHiddenFields: true,
+          })
+
+          if (debug) {
+            payload.logger.info(
+              `The collection "${collectionConfig.slug}" with ID ${doc.id} will be migrated`,
+            )
+          }
+
+          traverseFields({
+            doc,
+            fields,
+            path: '',
+            rows,
+          })
+
+          try {
+            await upsertRow({
+              id: doc.id,
+              adapter,
+              data: doc,
+              db,
+              fields,
+              ignoreResult: true,
+              operation: 'update',
+              req,
+              tableName,
+            })
+          } catch (err) {
+            payload.logger.error(
+              `The collection "${collectionConfig.slug}" with ID ${doc.id} has FAILED TO MIGRATE`,
+            )
+
+            throw err
+          }
+
+          if (debug) {
+            payload.logger.info(
+              `The collection "${collectionConfig.slug}" with ID ${doc.id} has migrated successfully!`,
+            )
+          }
+        }
+      }
+    }
+
+    if (globalSlug) {
+      const globalConfig = payload.config.globals?.find((global) => global.slug === globalSlug)
+
+      if (globalConfig) {
+        if (isVersions) {
+          const { docs } = await payload.findGlobalVersions({
+            slug: globalSlug,
+            depth: 0,
+            fallbackLocale: null,
+            limit: 0,
+            locale: 'all',
+            req,
+            showHiddenFields: true,
+          })
+
+          if (debug) {
+            payload.logger.info(`${docs.length} global "${globalSlug}" versions will be migrated`)
+          }
+
+          for (const doc of docs) {
+            traverseFields({
+              doc,
+              fields,
+              path: '',
+              rows,
+            })
+
+            try {
+              await upsertRow({
+                id: doc.id,
+                adapter,
+                data: doc,
+                db,
+                fields,
+                ignoreResult: true,
+                operation: 'update',
+                req,
+                tableName,
+              })
+            } catch (err) {
+              payload.logger.error(`"${globalSlug}" version with ID ${doc.id} FAILED TO MIGRATE`)
+
+              throw err
+            }
+
+            if (debug) {
+              payload.logger.info(
+                `"${globalSlug}" version with ID ${doc.id} migrated successfully!`,
+              )
+            }
+          }
+        } else {
+          const doc = await payload.findGlobal({
+            slug: globalSlug,
+            depth: 0,
+            fallbackLocale: null,
+            locale: 'all',
+            req,
+            showHiddenFields: true,
+          })
+
+          traverseFields({
+            doc,
+            fields,
+            path: '',
+            rows,
+          })
+
+          try {
+            await upsertRow({
+              adapter,
+              data: doc,
+              db,
+              fields,
+              ignoreResult: true,
+              operation: 'update',
+              req,
+              tableName,
+            })
+          } catch (err) {
+            payload.logger.error(`The global "${globalSlug}" has FAILED TO MIGRATE`)
+
+            throw err
+          }
+
+          if (debug) {
+            payload.logger.info(`The global "${globalSlug}" has migrated successfully!`)
+          }
+        }
+      }
+    }
+  }
+}

packages/db-vercel-postgres/src/predefinedMigrations/v2-v3/fetchAndResave/traverseFields.ts

@@ -0,0 +1,215 @@
+import type { Field } from 'payload'
+
+import { tabHasName } from 'payload/shared'
+
+type Args = {
+  doc: Record<string, unknown>
+  fields: Field[]
+  locale?: string
+  path: string
+  rows: Record<string, unknown>[]
+}
+
+export const traverseFields = ({ doc, fields, locale, path, rows }: Args) => {
+  fields.forEach((field) => {
+    switch (field.type) {
+      case 'group': {
+        const newPath = `${path ? `${path}.` : ''}${field.name}`
+        const newDoc = doc?.[field.name]
+
+        if (typeof newDoc === 'object' && newDoc !== null) {
+          if (field.localized) {
+            Object.entries(newDoc).forEach(([locale, localeDoc]) => {
+              return traverseFields({
+                doc: localeDoc,
+                fields: field.fields,
+                locale,
+                path: newPath,
+                rows,
+              })
+            })
+          } else {
+            return traverseFields({
+              doc: newDoc as Record<string, unknown>,
+              fields: field.fields,
+              path: newPath,
+              rows,
+            })
+          }
+        }
+
+        break
+      }
+
+      case 'row':
+      case 'collapsible': {
+        return traverseFields({
+          doc,
+          fields: field.fields,
+          path,
+          rows,
+        })
+      }
+
+      case 'array': {
+        const rowData = doc?.[field.name]
+
+        if (field.localized && typeof rowData === 'object' && rowData !== null) {
+          Object.entries(rowData).forEach(([locale, localeRows]) => {
+            if (Array.isArray(localeRows)) {
+              localeRows.forEach((row, i) => {
+                return traverseFields({
+                  doc: row as Record<string, unknown>,
+                  fields: field.fields,
+                  locale,
+                  path: `${path ? `${path}.` : ''}${field.name}.${i}`,
+                  rows,
+                })
+              })
+            }
+          })
+        }
+
+        if (Array.isArray(rowData)) {
+          rowData.forEach((row, i) => {
+            return traverseFields({
+              doc: row as Record<string, unknown>,
+              fields: field.fields,
+              path: `${path ? `${path}.` : ''}${field.name}.${i}`,
+              rows,
+            })
+          })
+        }
+
+        break
+      }
+
+      case 'blocks': {
+        const rowData = doc?.[field.name]
+
+        if (field.localized && typeof rowData === 'object' && rowData !== null) {
+          Object.entries(rowData).forEach(([locale, localeRows]) => {
+            if (Array.isArray(localeRows)) {
+              localeRows.forEach((row, i) => {
+                const matchedBlock = field.blocks.find((block) => block.slug === row.blockType)
+
+                if (matchedBlock) {
+                  return traverseFields({
+                    doc: row as Record<string, unknown>,
+                    fields: matchedBlock.fields,
+                    locale,
+                    path: `${path ? `${path}.` : ''}${field.name}.${i}`,
+                    rows,
+                  })
+                }
+              })
+            }
+          })
+        }
+
+        if (Array.isArray(rowData)) {
+          rowData.forEach((row, i) => {
+            const matchedBlock = field.blocks.find((block) => block.slug === row.blockType)
+
+            if (matchedBlock) {
+              return traverseFields({
+                doc: row as Record<string, unknown>,
+                fields: matchedBlock.fields,
+                path: `${path ? `${path}.` : ''}${field.name}.${i}`,
+                rows,
+              })
+            }
+          })
+        }
+
+        break
+      }
+
+      case 'tabs': {
+        return field.tabs.forEach((tab) => {
+          if (tabHasName(tab)) {
+            const newDoc = doc?.[tab.name]
+            const newPath = `${path ? `${path}.` : ''}${tab.name}`
+
+            if (typeof newDoc === 'object' && newDoc !== null) {
+              if (tab.localized) {
+                Object.entries(newDoc).forEach(([locale, localeDoc]) => {
+                  return traverseFields({
+                    doc: localeDoc,
+                    fields: tab.fields,
+                    locale,
+                    path: newPath,
+                    rows,
+                  })
+                })
+              } else {
+                return traverseFields({
+                  doc: newDoc as Record<string, unknown>,
+                  fields: tab.fields,
+                  path: newPath,
+                  rows,
+                })
+              }
+            }
+          } else {
+            traverseFields({
+              doc,
+              fields: tab.fields,
+              path,
+              rows,
+            })
+          }
+        })
+      }
+
+      case 'relationship':
+      case 'upload': {
+        if (typeof field.relationTo === 'string') {
+          if (field.type === 'upload' || !field.hasMany) {
+            const relationshipPath = `${path ? `${path}.` : ''}${field.name}`
+
+            if (field.localized) {
+              const matchedRelationshipsWithLocales = rows.filter(
+                (row) => row.path === relationshipPath,
+              )
+
+              if (matchedRelationshipsWithLocales.length && !doc[field.name]) {
+                doc[field.name] = {}
+              }
+
+              const newDoc = doc[field.name] as Record<string, unknown>
+
+              matchedRelationshipsWithLocales.forEach((localeRow) => {
+                if (typeof localeRow.locale === 'string') {
+                  const [, id] = Object.entries(localeRow).find(
+                    ([key, val]) =>
+                      val !== null && !['id', 'locale', 'order', 'parent_id', 'path'].includes(key),
+                  )
+
+                  newDoc[localeRow.locale] = id
+                }
+              })
+            } else {
+              const matchedRelationship = rows.find((row) => {
+                const matchesPath = row.path === relationshipPath
+
+                if (locale) return matchesPath && locale === row.locale
+
+                return row.path === relationshipPath
+              })
+
+              if (matchedRelationship) {
+                const [, id] = Object.entries(matchedRelationship).find(
+                  ([key, val]) =>
+                    val !== null && !['id', 'locale', 'order', 'parent_id', 'path'].includes(key),
+                )
+
+                doc[field.name] = id
+              }
+            }
+          }
+        }
+      }
+    }
+  })
+}

packages/db-vercel-postgres/src/predefinedMigrations/v2-v3/groupUpSQLStatements.ts

@@ -0,0 +1,74 @@
+export type Groups =
+  | 'addColumn'
+  | 'addConstraint'
+  | 'dropColumn'
+  | 'dropConstraint'
+  | 'dropTable'
+  | 'notNull'
+
+/**
+ * Convert an "ADD COLUMN" statement to an "ALTER COLUMN" statement
+ * example: ALTER TABLE "pages_blocks_my_block" ADD COLUMN "person_id" integer NOT NULL;
+ * to: ALTER TABLE "pages_blocks_my_block" ALTER COLUMN "person_id" SET NOT NULL;
+ * @param sql
+ */
+function convertAddColumnToAlterColumn(sql) {
+  // Regular expression to match the ADD COLUMN statement with its constraints
+  const regex = /ALTER TABLE ("[^"]+") ADD COLUMN ("[^"]+") [\w\s]+ NOT NULL;/
+
+  // Replace the matched part with "ALTER COLUMN ... SET NOT NULL;"
+  return sql.replace(regex, 'ALTER TABLE $1 ALTER COLUMN $2 SET NOT NULL;')
+}
+
+export const groupUpSQLStatements = (list: string[]): Record<Groups, string[]> => {
+  const groups = {
+    addColumn: 'ADD COLUMN',
+    // example: ALTER TABLE "posts" ADD COLUMN "category_id" integer
+
+    addConstraint: 'ADD CONSTRAINT',
+    //example:
+    // DO $$ BEGIN
+    //  ALTER TABLE "pages_blocks_my_block" ADD CONSTRAINT "pages_blocks_my_block_person_id_users_id_fk" FOREIGN KEY ("person_id") REFERENCES "users"("id") ON DELETE cascade ON UPDATE no action;
+    // EXCEPTION
+    //  WHEN duplicate_object THEN null;
+    // END $$;
+
+    dropColumn: 'DROP COLUMN',
+    // example: ALTER TABLE "_posts_v_rels" DROP COLUMN IF EXISTS "posts_id";
+
+    dropConstraint: 'DROP CONSTRAINT',
+    // example: ALTER TABLE "_posts_v_rels" DROP CONSTRAINT "_posts_v_rels_posts_fk";
+
+    dropTable: 'DROP TABLE',
+    // example: DROP TABLE "pages_rels";
+
+    notNull: 'NOT NULL',
+    // example: ALTER TABLE "pages_blocks_my_block" ALTER COLUMN "person_id" SET NOT NULL;
+  }
+
+  const result = Object.keys(groups).reduce((result, group: Groups) => {
+    result[group] = []
+    return result
+  }, {}) as Record<Groups, string[]>
+
+  for (const line of list) {
+    Object.entries(groups).some(([key, value]) => {
+      if (line.endsWith('NOT NULL;')) {
+        // split up the ADD COLUMN and ALTER COLUMN NOT NULL statements
+        // example: ALTER TABLE "pages_blocks_my_block" ADD COLUMN "person_id" integer NOT NULL;
+        // becomes two separate statements:
+        //  1. ALTER TABLE "pages_blocks_my_block" ADD COLUMN "person_id" integer;
+        //  2.  ALTER TABLE "pages_blocks_my_block" ALTER COLUMN "person_id" SET NOT NULL;
+        result.addColumn.push(line.replace(' NOT NULL;', ';'))
+        result.notNull.push(convertAddColumnToAlterColumn(line))
+        return true
+      }
+      if (line.includes(value)) {
+        result[key].push(line)
+        return true
+      }
+    })
+  }
+
+  return result
+}

packages/db-vercel-postgres/src/predefinedMigrations/v2-v3/index.ts

@@ -0,0 +1,278 @@
+import type { TransactionPg } from '@payloadcms/drizzle/types'
+import type { DrizzleSnapshotJSON } from 'drizzle-kit/api'
+import type { Payload, PayloadRequest } from 'payload'
+
+import { sql } from 'drizzle-orm'
+import fs from 'fs'
+import { createRequire } from 'module'
+import { buildVersionCollectionFields, buildVersionGlobalFields } from 'payload'
+import toSnakeCase from 'to-snake-case'
+
+import type { VercelPostgresAdapter } from '../../types.js'
+import type { PathsToQuery } from './types.js'
+
+import { groupUpSQLStatements } from './groupUpSQLStatements.js'
+import { migrateRelationships } from './migrateRelationships.js'
+import { traverseFields } from './traverseFields.js'
+
+const require = createRequire(import.meta.url)
+
+type Args = {
+  debug?: boolean
+  payload: Payload
+  req?: Partial<PayloadRequest>
+}
+
+/**
+ * Moves upload and relationship columns from the join table and into the tables while moving data
+ * This is done in the following order:
+ *    ADD COLUMNs
+ *    -- manipulate data to move relationships to new columns
+ *    ADD CONSTRAINTs
+ *    NOT NULLs
+ *    DROP TABLEs
+ *    DROP CONSTRAINTs
+ *    DROP COLUMNs
+ * @param debug
+ * @param payload
+ * @param req
+ */
+export const migratePostgresV2toV3 = async ({ debug, payload, req }: Args) => {
+  const adapter = payload.db as unknown as VercelPostgresAdapter
+  const db = adapter.sessions[await req.transactionID].db as TransactionPg
+  const dir = payload.db.migrationDir
+
+  // get the drizzle migrateUpSQL from drizzle using the last schema
+  const { generateDrizzleJson, generateMigration } = require('drizzle-kit/api')
+  const drizzleJsonAfter = generateDrizzleJson(adapter.schema)
+
+  // Get the previous migration snapshot
+  const previousSnapshot = fs
+    .readdirSync(dir)
+    .filter((file) => file.endsWith('.json') && !file.endsWith('relationships_v2_v3.json'))
+    .sort()
+    .reverse()?.[0]
+
+  if (!previousSnapshot) {
+    throw new Error(
+      `No previous migration schema file found! A prior migration from v2 is required to migrate to v3.`,
+    )
+  }
+
+  const drizzleJsonBefore = JSON.parse(
+    fs.readFileSync(`${dir}/${previousSnapshot}`, 'utf8'),
+  ) as DrizzleSnapshotJSON
+
+  const generatedSQL = await generateMigration(drizzleJsonBefore, drizzleJsonAfter)
+
+  if (!generatedSQL.length) {
+    payload.logger.info(`No schema changes needed.`)
+    process.exit(0)
+  }
+
+  const sqlUpStatements = groupUpSQLStatements(generatedSQL)
+
+  const addColumnsStatement = sqlUpStatements.addColumn.join('\n')
+
+  if (debug) {
+    payload.logger.info('CREATING NEW RELATIONSHIP COLUMNS')
+    payload.logger.info(addColumnsStatement)
+  }
+
+  await db.execute(sql.raw(addColumnsStatement))
+
+  for (const collection of payload.config.collections) {
+    const tableName = adapter.tableNameMap.get(toSnakeCase(collection.slug))
+    const pathsToQuery: PathsToQuery = new Set()
+
+    traverseFields({
+      adapter,
+      collectionSlug: collection.slug,
+      columnPrefix: '',
+      db,
+      disableNotNull: false,
+      fields: collection.fields,
+      isVersions: false,
+      newTableName: tableName,
+      parentTableName: tableName,
+      path: '',
+      pathsToQuery,
+      payload,
+      rootTableName: tableName,
+    })
+
+    await migrateRelationships({
+      adapter,
+      collectionSlug: collection.slug,
+      db,
+      debug,
+      fields: collection.fields,
+      isVersions: false,
+      pathsToQuery,
+      payload,
+      req,
+      tableName,
+    })
+
+    if (collection.versions) {
+      const versionsTableName = adapter.tableNameMap.get(
+        `_${toSnakeCase(collection.slug)}${adapter.versionsSuffix}`,
+      )
+      const versionFields = buildVersionCollectionFields(collection)
+      const versionPathsToQuery: PathsToQuery = new Set()
+
+      traverseFields({
+        adapter,
+        collectionSlug: collection.slug,
+        columnPrefix: '',
+        db,
+        disableNotNull: true,
+        fields: versionFields,
+        isVersions: true,
+        newTableName: versionsTableName,
+        parentTableName: versionsTableName,
+        path: '',
+        pathsToQuery: versionPathsToQuery,
+        payload,
+        rootTableName: versionsTableName,
+      })
+
+      await migrateRelationships({
+        adapter,
+        collectionSlug: collection.slug,
+        db,
+        debug,
+        fields: versionFields,
+        isVersions: true,
+        pathsToQuery: versionPathsToQuery,
+        payload,
+        req,
+        tableName: versionsTableName,
+      })
+    }
+  }
+
+  for (const global of payload.config.globals) {
+    const tableName = adapter.tableNameMap.get(toSnakeCase(global.slug))
+
+    const pathsToQuery: PathsToQuery = new Set()
+
+    traverseFields({
+      adapter,
+      columnPrefix: '',
+      db,
+      disableNotNull: false,
+      fields: global.fields,
+      globalSlug: global.slug,
+      isVersions: false,
+      newTableName: tableName,
+      parentTableName: tableName,
+      path: '',
+      pathsToQuery,
+      payload,
+      rootTableName: tableName,
+    })
+
+    await migrateRelationships({
+      adapter,
+      db,
+      debug,
+      fields: global.fields,
+      globalSlug: global.slug,
+      isVersions: false,
+      pathsToQuery,
+      payload,
+      req,
+      tableName,
+    })
+
+    if (global.versions) {
+      const versionsTableName = adapter.tableNameMap.get(
+        `_${toSnakeCase(global.slug)}${adapter.versionsSuffix}`,
+      )
+
+      const versionFields = buildVersionGlobalFields(global)
+
+      const versionPathsToQuery: PathsToQuery = new Set()
+
+      traverseFields({
+        adapter,
+        columnPrefix: '',
+        db,
+        disableNotNull: true,
+        fields: versionFields,
+        globalSlug: global.slug,
+        isVersions: true,
+        newTableName: versionsTableName,
+        parentTableName: versionsTableName,
+        path: '',
+        pathsToQuery: versionPathsToQuery,
+        payload,
+        rootTableName: versionsTableName,
+      })
+
+      await migrateRelationships({
+        adapter,
+        db,
+        debug,
+        fields: versionFields,
+        globalSlug: global.slug,
+        isVersions: true,
+        pathsToQuery: versionPathsToQuery,
+        payload,
+        req,
+        tableName: versionsTableName,
+      })
+    }
+  }
+
+  // ADD CONSTRAINT
+  const addConstraintsStatement = sqlUpStatements.addConstraint.join('\n')
+
+  if (debug) {
+    payload.logger.info('ADDING CONSTRAINTS')
+    payload.logger.info(addConstraintsStatement)
+  }
+
+  await db.execute(sql.raw(addConstraintsStatement))
+
+  // NOT NULL
+  const notNullStatements = sqlUpStatements.notNull.join('\n')
+
+  if (debug) {
+    payload.logger.info('NOT NULL CONSTRAINTS')
+    payload.logger.info(notNullStatements)
+  }
+
+  await db.execute(sql.raw(notNullStatements))
+
+  // DROP TABLE
+  const dropTablesStatement = sqlUpStatements.dropTable.join('\n')
+
+  if (debug) {
+    payload.logger.info('DROPPING TABLES')
+    payload.logger.info(dropTablesStatement)
+  }
+
+  await db.execute(sql.raw(dropTablesStatement))
+
+  // DROP CONSTRAINT
+  const dropConstraintsStatement = sqlUpStatements.dropConstraint.join('\n')
+
+  if (debug) {
+    payload.logger.info('DROPPING CONSTRAINTS')
+    payload.logger.info(dropConstraintsStatement)
+  }
+
+  await db.execute(sql.raw(dropConstraintsStatement))
+
+  // DROP COLUMN
+  const dropColumnsStatement = sqlUpStatements.dropColumn.join('\n')
+
+  if (debug) {
+    payload.logger.info('DROPPING COLUMNS')
+    payload.logger.info(dropColumnsStatement)
+  }
+
+  await db.execute(sql.raw(dropColumnsStatement))
+}

packages/db-vercel-postgres/src/predefinedMigrations/v2-v3/migrateRelationships.ts

@@ -0,0 +1,103 @@
+import type { TransactionPg } from '@payloadcms/drizzle/types'
+import type { Field, Payload, PayloadRequest } from 'payload'
+
+import { sql } from 'drizzle-orm'
+
+import type { VercelPostgresAdapter } from '../../types.js'
+import type { DocsToResave, PathsToQuery } from './types.js'
+
+import { fetchAndResave } from './fetchAndResave/index.js'
+
+type Args = {
+  adapter: VercelPostgresAdapter
+  collectionSlug?: string
+  db: TransactionPg
+  debug: boolean
+  fields: Field[]
+  globalSlug?: string
+  isVersions: boolean
+  pathsToQuery: PathsToQuery
+  payload: Payload
+  req?: Partial<PayloadRequest>
+  tableName: string
+}
+
+export const migrateRelationships = async ({
+  adapter,
+  collectionSlug,
+  db,
+  debug,
+  fields,
+  globalSlug,
+  isVersions,
+  pathsToQuery,
+  payload,
+  req,
+  tableName,
+}: Args) => {
+  if (pathsToQuery.size === 0) return
+
+  let offset = 0
+
+  let paginationResult
+
+  const where = Array.from(pathsToQuery).reduce((statement, path, i) => {
+    return (statement += `
+"${tableName}${adapter.relationshipsSuffix}"."path" LIKE '${path}'${pathsToQuery.size !== i + 1 ? ' OR' : ''}
+`)
+  }, '')
+
+  while (typeof paginationResult === 'undefined' || paginationResult.rows.length > 0) {
+    const paginationStatement = `SELECT DISTINCT parent_id FROM ${tableName}${adapter.relationshipsSuffix} WHERE
+    ${where} ORDER BY parent_id LIMIT 500 OFFSET ${offset * 500};
+  `
+
+    paginationResult = await adapter.drizzle.execute(sql.raw(`${paginationStatement}`))
+
+    if (paginationResult.rows.length === 0) return
+
+    offset += 1
+
+    const statement = `SELECT * FROM ${tableName}${adapter.relationshipsSuffix} WHERE
+    (${where}) AND parent_id IN (${paginationResult.rows.map((row) => row.parent_id).join(', ')});
+`
+    if (debug) {
+      payload.logger.info('FINDING ROWS TO MIGRATE')
+      payload.logger.info(statement)
+    }
+
+    const result = await adapter.drizzle.execute(sql.raw(`${statement}`))
+
+    const docsToResave: DocsToResave = {}
+
+    result.rows.forEach((row) => {
+      const parentID = row.parent_id
+
+      if (typeof parentID === 'string' || typeof parentID === 'number') {
+        if (!docsToResave[parentID]) docsToResave[parentID] = []
+        docsToResave[parentID].push(row)
+      }
+    })
+
+    await fetchAndResave({
+      adapter,
+      collectionSlug,
+      db,
+      debug,
+      docsToResave,
+      fields,
+      globalSlug,
+      isVersions,
+      payload,
+      req: req as unknown as PayloadRequest,
+      tableName,
+    })
+  }
+
+  const deleteStatement = `DELETE FROM ${tableName}${adapter.relationshipsSuffix} WHERE ${where}`
+  if (debug) {
+    payload.logger.info('DELETING ROWS')
+    payload.logger.info(deleteStatement)
+  }
+  await db.execute(sql.raw(`${deleteStatement}`))
+}

packages/db-vercel-postgres/src/predefinedMigrations/v2-v3/traverseFields.ts

@@ -0,0 +1,117 @@
+import type { TransactionPg } from '@payloadcms/drizzle/types'
+import type { Field, Payload } from 'payload'
+
+import { tabHasName } from 'payload/shared'
+import toSnakeCase from 'to-snake-case'
+
+import type { VercelPostgresAdapter } from '../../types.js'
+import type { PathsToQuery } from './types.js'
+
+type Args = {
+  adapter: VercelPostgresAdapter
+  collectionSlug?: string
+  columnPrefix: string
+  db: TransactionPg
+  disableNotNull: boolean
+  fields: Field[]
+  globalSlug?: string
+  isVersions: boolean
+  newTableName: string
+  parentTableName: string
+  path: string
+  pathsToQuery: PathsToQuery
+  payload: Payload
+  rootTableName: string
+}
+
+export const traverseFields = (args: Args) => {
+  args.fields.forEach((field) => {
+    switch (field.type) {
+      case 'group': {
+        let newTableName = `${args.newTableName}_${toSnakeCase(field.name)}`
+
+        if (field.localized && args.payload.config.localization) {
+          newTableName += args.adapter.localesSuffix
+        }
+
+        return traverseFields({
+          ...args,
+          columnPrefix: `${args.columnPrefix}${toSnakeCase(field.name)}_`,
+          fields: field.fields,
+          newTableName,
+          path: `${args.path ? `${args.path}.` : ''}${field.name}`,
+        })
+      }
+
+      case 'row':
+      case 'collapsible': {
+        return traverseFields({
+          ...args,
+          fields: field.fields,
+        })
+      }
+
+      case 'array': {
+        const newTableName = args.adapter.tableNameMap.get(
+          `${args.newTableName}_${toSnakeCase(field.name)}`,
+        )
+
+        return traverseFields({
+          ...args,
+          columnPrefix: '',
+          fields: field.fields,
+          newTableName,
+          parentTableName: newTableName,
+          path: `${args.path ? `${args.path}.` : ''}${field.name}.%`,
+        })
+      }
+
+      case 'blocks': {
+        return field.blocks.forEach((block) => {
+          const newTableName = args.adapter.tableNameMap.get(
+            `${args.rootTableName}_blocks_${toSnakeCase(block.slug)}`,
+          )
+
+          traverseFields({
+            ...args,
+            columnPrefix: '',
+            fields: block.fields,
+            newTableName,
+            parentTableName: newTableName,
+            path: `${args.path ? `${args.path}.` : ''}${field.name}.%`,
+          })
+        })
+      }
+
+      case 'tabs': {
+        return field.tabs.forEach((tab) => {
+          if (tabHasName(tab)) {
+            args.columnPrefix = `${args.columnPrefix}_${toSnakeCase(tab.name)}_`
+            args.path = `${args.path ? `${args.path}.` : ''}${tab.name}`
+            args.newTableName = `${args.newTableName}_${toSnakeCase(tab.name)}`
+
+            if (tab.localized && args.payload.config.localization) {
+              args.newTableName += args.adapter.localesSuffix
+            }
+          }
+
+          traverseFields({
+            ...args,
+            fields: tab.fields,
+          })
+        })
+      }
+
+      case 'relationship':
+      case 'upload': {
+        if (typeof field.relationTo === 'string') {
+          if (field.type === 'upload' || !field.hasMany) {
+            args.pathsToQuery.add(`${args.path ? `${args.path}.` : ''}${field.name}`)
+          }
+        }
+
+        return null
+      }
+    }
+  })
+}

packages/db-vercel-postgres/src/predefinedMigrations/v2-v3/types.ts

@@ -0,0 +1,9 @@
+/**
+ * Set of all paths which should be moved
+ * This will be built up into one WHERE query
+ */
+export type PathsToQuery = Set<string>
+
+export type DocsToResave = {
+  [id: number | string]: Record<string, unknown>[]
+}

packages/db-vercel-postgres/src/types.ts

@@ -0,0 +1,78 @@
+import type {
+  BasePostgresAdapter,
+  GenericEnum,
+  MigrateDownArgs,
+  MigrateUpArgs,
+  PostgresDB,
+} from '@payloadcms/drizzle/postgres'
+import type { DrizzleAdapter } from '@payloadcms/drizzle/types'
+import type { VercelPool, VercelPostgresPoolConfig } from '@vercel/postgres'
+import type { DrizzleConfig } from 'drizzle-orm'
+import type { PgSchema, PgTableFn, PgTransactionConfig } from 'drizzle-orm/pg-core'
+
+export type Args = {
+  connectionString?: string
+  idType?: 'serial' | 'uuid'
+  localesSuffix?: string
+  logger?: DrizzleConfig['logger']
+  migrationDir?: string
+  /**
+   * Optional pool configuration for Vercel Postgres
+   * If not provided, vercel/postgres will attempt to use the Vercel environment variables
+   */
+  pool?: VercelPostgresPoolConfig
+  prodMigrations?: {
+    down: (args: MigrateDownArgs) => Promise<void>
+    name: string
+    up: (args: MigrateUpArgs) => Promise<void>
+  }[]
+  push?: boolean
+  relationshipsSuffix?: string
+  /**
+   * The schema name to use for the database
+   * @experimental This only works when there are not other tables or enums of the same name in the database under a different schema. Awaiting fix from Drizzle.
+   */
+  schemaName?: string
+  transactionOptions?: PgTransactionConfig | false
+  versionsSuffix?: string
+}
+
+export type VercelPostgresAdapter = {
+  pool?: VercelPool
+  poolOptions?: Args['pool']
+} & BasePostgresAdapter
+
+declare module 'payload' {
+  export interface DatabaseAdapter
+    extends Omit<Args, 'idType' | 'logger' | 'migrationDir' | 'pool'>,
+      DrizzleAdapter {
+    beginTransaction: (options?: PgTransactionConfig) => Promise<null | number | string>
+    drizzle: PostgresDB
+    enums: Record<string, GenericEnum>
+    /**
+     * An object keyed on each table, with a key value pair where the constraint name is the key, followed by the dot-notation field name
+     * Used for returning properly formed errors from unique fields
+     */
+    fieldConstraints: Record<string, Record<string, string>>
+    idType: Args['idType']
+    initializing: Promise<void>
+    localesSuffix?: string
+    logger: DrizzleConfig['logger']
+    pgSchema?: { table: PgTableFn } | PgSchema
+    pool: VercelPool
+    poolOptions: Args['pool']
+    prodMigrations?: {
+      down: (args: MigrateDownArgs) => Promise<void>
+      name: string
+      up: (args: MigrateUpArgs) => Promise<void>
+    }[]
+    push: boolean
+    rejectInitializing: () => void
+    relationshipsSuffix?: string
+    resolveInitializing: () => void
+    schema: Record<string, unknown>
+    schemaName?: Args['schemaName']
+    tableNameMap: Map<string, string>
+    versionsSuffix?: string
+  }
+}

packages/db-vercel-postgres/tsconfig.json

@@ -0,0 +1,38 @@
+{
+  "extends": "../../tsconfig.json",
+  "compilerOptions": {
+    "composite": true,
+    "noEmit": false,
+    "emitDeclarationOnly": true,
+    "outDir": "./dist",
+    "rootDir": "./src",
+    "skipLibCheck": true,
+  },
+  "exclude": [
+    "dist",
+    "build",
+    "tests",
+    "test",
+    "node_modules",
+    "eslint.config.js",
+    "src/**/*.spec.js",
+    "src/**/*.spec.jsx",
+    "src/**/*.spec.ts",
+    "src/**/*.spec.tsx"
+  ],
+  "include": [
+    "src",
+    "src/**/*.ts",
+  ],
+  "references": [
+    {
+      "path": "../payload"
+    },
+    {
+      "path": "../translations"
+    },
+    {
+      "path": "../drizzle"
+    }
+  ]
+}

packages/drizzle/src/postgres/createMigration.ts

@@ -1,4 +1,3 @@
-import type { DrizzleSnapshotJSON } from 'drizzle-kit/api'
 import type { CreateMigration } from 'payload'
 
 import fs from 'fs'
@@ -112,6 +111,7 @@ export const createMigration: CreateMigration = async function createMigration(
     getMigrationTemplate({
       downSQL: downSQL || `  // Migration code`,
       imports,
+      packageName: payload.db.packageName,
       upSQL: upSQL || `  // Migration code`,
     }),
   )

packages/drizzle/src/postgres/getMigrationTemplate.ts

@@ -9,8 +9,9 @@ export const indent = (text: string) =>
 export const getMigrationTemplate = ({
   downSQL,
   imports,
+  packageName,
   upSQL,
-}: MigrationTemplateArgs): string => `import { MigrateUpArgs, MigrateDownArgs, sql } from '@payloadcms/db-postgres'
+}: MigrationTemplateArgs): string => `import { MigrateUpArgs, MigrateDownArgs, sql } from '${packageName}'
 ${imports ? `${imports}\n` : ''}
 export async function up({ payload, req }: MigrateUpArgs): Promise<void> {
 ${indent(upSQL)}

packages/drizzle/src/postgres/types.ts

@@ -111,8 +111,6 @@ export type BasePostgresAdapter = {
   logger: DrizzleConfig['logger']
   operators: Operators
   pgSchema?: Schema
-  // pool: Pool
-  // poolOptions: Args['pool']
   prodMigrations?: {
     down: (args: MigrateDownArgs) => Promise<void>
     name: string

packages/payload/src/database/types.ts

@@ -100,6 +100,13 @@ export interface BaseDatabaseAdapter {
    * The name of the database adapter
    */
   name: string
+  /**
+   * Full package name of the database adapter
+   *
+   * @example @payloadcms/db-postgres
+   */
+  packageName: string
+
   /**
    * reference to the instance of payload
    */
@@ -434,5 +441,6 @@ export type DBIdentifierName =
 export type MigrationTemplateArgs = {
   downSQL?: string
   imports?: string
+  packageName?: string
   upSQL?: string
 }

pnpm-lock.yaml

@@ -383,6 +383,52 @@ importers:
         specifier: workspace:*
         version: link:../payload
 
+  packages/db-vercel-postgres:
+    dependencies:
+      '@payloadcms/drizzle':
+        specifier: workspace:*
+        version: link:../drizzle
+      '@vercel/postgres':
+        specifier: ^0.9.0
+        version: 0.9.0
+      console-table-printer:
+        specifier: 2.11.2
+        version: 2.11.2
+      drizzle-kit:
+        specifier: 0.23.2-df9e596
+        version: 0.23.2-df9e596
+      drizzle-orm:
+        specifier: 0.32.1
+        version: 0.32.1(@libsql/client@0.6.2(bufferutil@4.0.8)(utf-8-validate@6.0.4))(@neondatabase/serverless@0.9.4)(@types/pg@8.10.2)(@vercel/postgres@0.9.0)(pg@8.11.3)(react@19.0.0-rc-06d0b89e-20240801)(types-react@19.0.0-rc.0)
+      prompts:
+        specifier: 2.4.2
+        version: 2.4.2
+      to-snake-case:
+        specifier: 1.0.0
+        version: 1.0.0
+      uuid:
+        specifier: 10.0.0
+        version: 10.0.0
+    devDependencies:
+      '@hyrious/esbuild-plugin-commonjs':
+        specifier: ^0.2.4
+        version: 0.2.4(cjs-module-lexer@1.3.1)(esbuild@0.23.0)
+      '@payloadcms/eslint-config':
+        specifier: workspace:*
+        version: link:../eslint-config
+      '@types/pg':
+        specifier: 8.10.2
+        version: 8.10.2
+      '@types/to-snake-case':
+        specifier: 1.0.0
+        version: 1.0.0
+      esbuild:
+        specifier: 0.23.0
+        version: 0.23.0
+      payload:
+        specifier: workspace:*
+        version: link:../payload
+
   packages/drizzle:
     dependencies:
       console-table-printer:
@@ -1600,6 +1646,9 @@ importers:
       '@payloadcms/db-sqlite':
         specifier: workspace:*
         version: link:../packages/db-sqlite
+      '@payloadcms/db-vercel-postgres':
+        specifier: workspace:*
+        version: link:../packages/db-vercel-postgres
       '@payloadcms/drizzle':
         specifier: workspace:*
         version: link:../packages/drizzle
@@ -12239,7 +12288,6 @@ snapshots:
   '@neondatabase/serverless@0.9.4':
     dependencies:
       '@types/pg': 8.11.6
-    optional: true
 
   '@next/bundle-analyzer@15.0.0-canary.104(bufferutil@4.0.8)':
     dependencies:
@@ -13088,7 +13136,6 @@ snapshots:
       '@types/node': 20.12.5
       pg-protocol: 1.6.1
       pg-types: 4.0.2
-    optional: true
 
   '@types/pluralize@0.0.33': {}
 
@@ -13326,7 +13373,6 @@ snapshots:
       bufferutil: 4.0.8
       utf-8-validate: 6.0.4
       ws: 8.18.0(bufferutil@4.0.8)(utf-8-validate@6.0.4)
-    optional: true
 
   '@vue/compiler-core@3.4.37':
     dependencies:
@@ -13832,7 +13878,6 @@ snapshots:
   bufferutil@4.0.8:
     dependencies:
       node-gyp-build: 4.8.1
-    optional: true
 
   bundle-name@3.0.0:
     dependencies:
@@ -16940,8 +16985,7 @@ snapshots:
       fetch-blob: 3.2.0
       formdata-polyfill: 4.0.10
 
-  node-gyp-build@4.8.1:
-    optional: true
+  node-gyp-build@4.8.1: {}
 
   node-int64@0.4.0: {}
 
@@ -18724,7 +18768,6 @@ snapshots:
   utf-8-validate@6.0.4:
     dependencies:
       node-gyp-build: 4.8.1
-    optional: true
 
   utf8-byte-length@1.0.5: {}
 

scripts/pack-all-to-dest.ts

@@ -9,6 +9,8 @@ import { fileURLToPath } from 'node:url'
 import path from 'path'
 import util from 'util'
 
+import type { PackageDetails } from './lib/getPackageDetails.js'
+
 import { getPackageDetails } from './lib/getPackageDetails.js'
 
 const execOpts: ExecSyncOptions = { stdio: 'inherit' }
@@ -47,6 +49,7 @@ async function main() {
         'drizzle',
         'db-sqlite',
         'db-postgres',
+        'db-vercel-postgres',
         'richtext-lexical',
         'translations',
         'plugin-cloud',
@@ -58,19 +61,17 @@ async function main() {
   // Prebuild all packages
   header(`\n🔨 Prebuilding all packages...`)
 
-  //await execa('pnpm', ['install'], execaOpts)
-
   const filtered = packageDetails.filter((p): p is Exclude<typeof p, null> => p !== null)
 
-  header(`\nOutputting ${filtered.length} packages...
-
-${chalk.white.bold(filtered.map((p) => p.name).join('\n'))}
-`)
   if (!noBuild) {
     execSync('pnpm build:all --output-logs=errors-only', { stdio: 'inherit' })
   }
 
-  header(`\n 📦 Packing all packages to ${dest}...`)
+  header(`\nOutputting ${filtered.length} packages...
+
+${chalk.white.bold(listPackages(filtered))}`)
+
+  header(`\n📦 Packing all packages to ${dest}...`)
 
   await Promise.all(
     filtered.map(async (p) => {
@@ -84,3 +85,7 @@ ${chalk.white.bold(filtered.map((p) => p.name).join('\n'))}
 function header(message: string, opts?: { enable?: boolean }) {
   console.log(chalk.bold.green(`${message}\n`))
 }
+
+function listPackages(packages: PackageDetails[]) {
+  return packages.map((p) => `  - ${p.name}`).join('\n')
+}

test/package.json

@@ -28,6 +28,7 @@
     "@payloadcms/db-mongodb": "workspace:*",
     "@payloadcms/db-postgres": "workspace:*",
     "@payloadcms/db-sqlite": "workspace:*",
+    "@payloadcms/db-vercel-postgres": "workspace:*",
     "@payloadcms/drizzle": "workspace:*",
     "@payloadcms/email-nodemailer": "workspace:*",
     "@payloadcms/email-resend": "workspace:*",

test/setupProd.ts

@@ -9,6 +9,7 @@ export const tgzToPkgNameMap = {
   payload: 'payload-*',
   '@payloadcms/db-mongodb': 'payloadcms-db-mongodb-*',
   '@payloadcms/db-postgres': 'payloadcms-db-postgres-*',
+  '@payloadcms/db-vercel-postgres': 'payloadcms-db-vercel-postgres-*',
   '@payloadcms/db-sqlite': 'payloadcms-db-sqlite-*',
   '@payloadcms/drizzle': 'payloadcms-drizzle-*',
   '@payloadcms/email-nodemailer': 'payloadcms-email-nodemailer-*',