template(db): Update api/src/lib/db template (#11379)

Updates the template in `api/src/lib/db.{js,ts}` to export `db` in a
different way.

This makes it easier to add Prisma client extensions.

---------

Co-authored-by: Josh GM Walker <56300765+Josh-Walker-GM@users.noreply.github.com>

.changesets/11379.md

@@ -0,0 +1,29 @@
+- template(db): Update `api/src/lib/db` template (#11379) by @dac09
+
+Updates the template in `api/src/lib/db.{js,ts}` to export `db` differently.
+
+In your existing projects, you can make the following changes:
+
+```diff
+
+import { PrismaClient } from '@prisma/client'
+
+import { emitLogLevels, handlePrismaLogging } from '@redwoodjs/api/logger'
+
+import { logger } from './logger'
+import { prismaExtension } from './uploads'
+
+- export const db = new PrismaClient({
++ const prismaClient = new PrismaClient({
+  log: emitLogLevels(['info', 'warn', 'error']),
+})
+
+handlePrismaLogging({
+- db
++ db: prismaClient,
+  logger,
+  logLevels: ['info', 'warn', 'error'],
+})
+
++ export const db = prismaClient
+```

__fixtures__/test-project/api/src/lib/db.ts

@@ -7,15 +7,20 @@ import { emitLogLevels, handlePrismaLogging } from '@redwoodjs/api/logger'
 
 import { logger } from './logger'
 
-/*
- * Instance of the Prisma Client
- */
-export const db = new PrismaClient({
+const prismaClient = new PrismaClient({
   log: emitLogLevels(['info', 'warn', 'error']),
 })
 
 handlePrismaLogging({
-  db,
+  db: prismaClient,
   logger,
   logLevels: ['info', 'warn', 'error'],
 })
+
+/**
+ * Global Prisma client extensions should be added here, as $extend
+ * returns a new instance.
+ * export const db = prismaClient.$extend(...)
+ * Add any .$on hooks before using $extend
+ */
+export const db = prismaClient

packages/create-redwood-app/templates/js/api/src/lib/db.js

@@ -7,15 +7,20 @@ import { emitLogLevels, handlePrismaLogging } from '@redwoodjs/api/logger'
 
 import { logger } from './logger'
 
-/*
- * Instance of the Prisma Client
- */
-export const db = new PrismaClient({
+const prismaClient = new PrismaClient({
   log: emitLogLevels(['info', 'warn', 'error']),
 })
 
 handlePrismaLogging({
-  db,
+  db: prismaClient,
   logger,
   logLevels: ['info', 'warn', 'error'],
 })
+
+/**
+ * Global Prisma client extensions should be added here, as $extend
+ * returns a new instance.
+ * export const db = prismaClient.$extend(...)
+ * Add any .$on hooks before using $extend
+ */
+export const db = prismaClient

packages/create-redwood-app/templates/ts/api/src/lib/db.ts

@@ -7,15 +7,20 @@ import { emitLogLevels, handlePrismaLogging } from '@redwoodjs/api/logger'
 
 import { logger } from './logger'
 
-/*
- * Instance of the Prisma Client
- */
-export const db = new PrismaClient({
+const prismaClient = new PrismaClient({
   log: emitLogLevels(['info', 'warn', 'error']),
 })
 
 handlePrismaLogging({
-  db,
+  db: prismaClient,
   logger,
   logLevels: ['info', 'warn', 'error'],
 })
+
+/**
+ * Global Prisma client extensions should be added here, as $extend
+ * returns a new instance.
+ * export const db = prismaClient.$extend(...)
+ * Add any .$on hooks before using $extend
+ */
+export const db = prismaClient