fix(client): include enums into scalar select lists

packages/client/src/generation/TSClient/Model.ts

@@ -341,7 +341,7 @@ ${ifExtensions(() => {
 export type ${getSelectName(model.name)}Scalar = {
 ${indent(
   outputType.fields
-    .filter((field) => field.outputType.location === 'scalar')
+    .filter((field) => field.outputType.location === 'scalar' || field.outputType.location === 'enumTypes')
     .map((f) => `${f.name}?: boolean`)
     .join('\n'),
   TAB_SIZE,

packages/client/tests/functional/issues/16535-select-enum/_matrix.ts

@@ -0,0 +1,15 @@
+import { defineMatrix } from '../../_utils/defineMatrix'
+
+export default defineMatrix(() => [
+  [
+    {
+      provider: 'postgresql',
+    },
+    {
+      provider: 'mysql',
+    },
+    {
+      provider: 'cockroachdb',
+    },
+  ],
+])

packages/client/tests/functional/issues/16535-select-enum/prisma/_schema.ts

@@ -0,0 +1,26 @@
+import { idForProvider } from '../../../_utils/idForProvider'
+import testMatrix from '../_matrix'
+
+export default testMatrix.setupSchema(({ provider }) => {
+  return /* Prisma */ `
+  generator client {
+    provider = "prisma-client-js"
+    previewFeatures = ["clientExtensions"]
+  }
+
+  datasource db {
+    provider = "${provider}"
+    url      = env("DATABASE_URI_${provider}")
+  }
+
+  model User {
+    id ${idForProvider(provider)}
+    role UserRole
+  }
+
+  enum UserRole {
+    ADMIN
+    USER
+  }
+  `
+})

packages/client/tests/functional/issues/16535-select-enum/tests.ts

@@ -0,0 +1,29 @@
+import testMatrix from './_matrix'
+// @ts-ignore
+import type { Prisma as PrismaNamespace, PrismaClient } from './node_modules/@prisma/client'
+
+declare let prisma: PrismaClient
+declare let Prisma: typeof PrismaNamespace
+
+testMatrix.setupTestSuite(
+  () => {
+    test('allows to select enum field', async () => {
+      const user = await prisma.user.create({
+        data: {
+          role: 'ADMIN',
+        },
+        select: {
+          role: true,
+        },
+      })
+
+      expect(user).toEqual({ role: 'ADMIN' })
+    })
+  },
+  {
+    optOut: {
+      from: ['sqlite', 'mongodb', 'sqlserver'],
+      reason: 'No support for enums',
+    },
+  },
+)