nest.js service from prisma $extends (type 2) variant

DatabaseService.ts

    constructor() {
        super()

        const ext = Prisma.defineExtension((client) =>
            client.$extends({
                name: 'webinarAfterCreate',
                query: {
                    webinar: {
                        async create({ args, query }) {
                            console.log('webinarAfterCreate', args)
                            const result = await query(args)
                            console.log(result)

                            // afterCreate logic
                            console.log(
                                await client.topBanner.create({
                                    data: {
                                        title: faker.commerce.product(),
                                        url:
                                            'https://papago.naver.com/' +
                                            result.title,
                                    },
                                }),
                            )

                            return result
                        },
                    },
                },
            }),
        )

        Object.assign(this, new PrismaClient().$extends(ext))
    }