index.js

const { GraphQLServer } = require("graphql-yoga");
const { Prisma } = require("prisma-binding");

const getPrismaInstance = () => {
  return new Prisma({
    typeDefs: "generated-schema.graphql",
    endpoint: "http://localhost:4466/application-server"
  });
};

const resolvers = {
  Query: {
    posts: (
      _,
      { where, orderBy, skip, after, before, first, last },
      ctx,
      info
    ) => {
      return ctx.db.query.posts(
        { where, orderBy, skip, after, before, first, last },
        info
      );
    }
  },

  Mutation: {
    createPost: (_, { data }, ctx, info) => {
      return ctx.db.mutation.createPost({ data }, info);
    },

    deletePost: (_, { id }, ctx, info) => {
      return ctx.db.mutation.deletePost({ where: { id } }, `{ id }`);
    }
  }
};

const server = new GraphQLServer({
  typeDefs: "schema.graphql",
  resolvers,
  context: {
    db: getPrismaInstance()
  }
});
server.start(() => console.log("Server is running on localhost:4000"));