server-src-graphql-schema.js

const { GraphQLSchema, GraphQLObjectType } = require('graphql');
const { NotesQuery } = require('./query/NotesQuery');
const {
  CreateNoteMutation,
  UpdateNoteMutation,
  DeleteNoteMutation
} = require('./mutation/NotesMutation');

const QueryType = new GraphQLObjectType({
  name: 'Query',
  fields: () => ({
    notes: NotesQuery
  })
});

const MutationType = new GraphQLObjectType({
  name: 'Mutation',
  fields: () => ({
    createNote: CreateNoteMutation,
    deleteNote: DeleteNoteMutation,
    updateNote: UpdateNoteMutation
  })
});

const schema = new GraphQLSchema({ query: QueryType, mutation: MutationType });

module.exports = schema;