How do you bootstrap a NestJS GraphQL application in code-first mode?
Import GraphQLModule.forRoot() with ApolloDriver and set autoSchemaFile to a path or true for in-memory. The driver option selects the underlying GraphQL server (Apollo or Mercurius). The context factory forwards the HTTP request into the GraphQL context so resolvers and guards can access it.
GraphQLModule setup for code-first
Key configuration options:
autoSchemaFile — path where the generated SDL is saved; set to true to keep it in memory only.
driver: ApolloDriver — NestJS supports Apollo (Express/Fastify) and Mercurius (Fastify-only).
context factory — builds the context object available inside every resolver; always forward req here.
sortSchema: true — alphabetically sorts the generated SDL for stable git diffs.
playground: true — enables the GraphQL Playground UI at /graphql in development.