{"id":507,"hash":"8129a769e55993c743f03ce2edc6ed8444823a504cdc138cb1e6aa365e010e43","pattern":"GraphQLError: Query root type must be provided","full_message":"I'm using NestJS, TypeORM and GraphQL for my backend API. I'm getting the following error:\n\nGraphQLError [Object]: Query root type must be provided.\n      at SchemaValidationContext.reportError (/home/wise-introvert/Container/Projects/the-notebook/app/server/node_modules/graphql/type/validate.js:88:19)\n      at validateRootTypes (/home/wise-introvert/Container/Projects/the-notebook/app/server/node_modules/graphql/type/validate.js:107:13)\n      at validateSchema (/home/wise-introvert/Container/Projects/the-notebook/app/server/node_modules/graphql/type/validate.js:52:3)\n      at graphqlImpl (/home/wise-introvert/Container/Projects/the-notebook/app/server/node_modules/graphql/graphql.js:79:62)\n      at /home/wise-introvert/Container/Projects/the-notebook/app/server/node_modules/graphql/graphql.js:28:59\n      at new Promise (<anonymous>)\n      at Object.graphql (/home/wise-introvert/Container/Projects/the-notebook/app/server/node_modules/graphql/graphql.js:26:10)\n      at GraphQLSchemaFactory.<anonymous> (/home/wise-introvert/Container/Projects/the-notebook/app/server/node_modules/@nestjs/graphql/dist/schema-builder/graphql-schema.factory.js:49:52)\n      at Generator.next (<anonymous>)\n      at /home/wise-introvert/Container/Projects/the-notebook/app/server/node_modules/tslib/tslib.js:114:75\n\nThis is what my file structure and code looks like:\n\nCan someone please help me. My repo: https://github.com/wise-introvert/nestjs-graphql-api.git","ecosystem":"npm","package_name":"postgresql","package_version":null,"solution":"All servers running with GraphQL must have at least one @Query() to be considered a valid GraphQL server. Without it, the apollo-server package will throw an exception and the server will fail to start. This can be as simple as\n\n@Resolver()\nexport class FooResolver {\n\n  @Query(() => String)\n  sayHello(): string {\n    return 'Hello World!';\n  }\n}","confidence":0.95,"source":"stackoverflow","source_url":"https://stackoverflow.com/questions/64105940/graphqlerror-query-root-type-must-be-provided","votes":44,"created_at":"2026-04-19T04:51:16.275571+00:00","updated_at":"2026-04-19T04:51:16.275571+00:00"}