query database in hello resolver

src/graphql/resolvers/HelloResolver.ts

@@ -1,11 +1,13 @@
 import { Resolver, Query } from 'type-graphql'
 
+import { prisma } from '#src/prisma'
 import { Hello } from '#types/Hello'
 
 @Resolver()
 export class HelloResolver {
   @Query(() => Hello)
   async hello(): Promise<Hello> {
-    return new Hello('Hello world!')
+    const data = await prisma.hello.findFirst()
+    return new Hello(data?.text ?? 'Hello World!')
   }
 }

src/index.ts

@@ -1,15 +1,21 @@
 // eslint-disable-next-line import/no-unassigned-import
 import 'reflect-metadata'
+import { prisma } from './prisma'
 import { listen } from './server/server'
 
-export async function main() {
+export const main = async (): Promise<void> => {
   const url = await listen(4000)
   // eslint-disable-next-line no-console
   console.log(`🚀 Server is ready at ${url}`)
 }
 
-main().catch((e) => {
+// eslint-disable-next-line promise/catch-or-return
+main()
+  .catch((e) => {
     // eslint-disable-next-line no-console
     console.error(e)
     throw e
   })
+  .finally(async () => {
+    await prisma.$disconnect()
+  })

src/prisma.ts

@@ -0,0 +1,3 @@
+import { PrismaClient } from '@prisma/client'
+
+export const prisma = new PrismaClient()