Apollo server 3 is out and in Meteor 2.4 the Apollo skeleton is going to be updated to it. But if you have an existing project with Apollo 2 in your Meteor app, you will have to spend a little bit of a time to get to the newest version.

Here I will cover the basic 3 steps to upgrade to Apollo 3 in your Meteor app. Do note that you will probably do a little bit more for your particular app as there are many changes. Don't forget to study theApollo migration guide.

1. Add Express to your dependencies

Express has becomepeer dependency for Apollo and Connect which comes bundled with Meteor is no longer enough, so you will need to add it for Apollo to run:

meteor npm i--save express

2. Update your Apollo starting script

You will have to re-visit your starting script as Apollo now requires toexplicitly call the start function. This will mean that you will have to re-structure a bit how to start the server with Apollo:

// apollo.jsimport{ApolloServer}from'apollo-server-express';import{WebApp}from'meteor/webapp';import{getUser}from'meteor/apollo';import{makeExecutableSchema}from'@graphql-tools/schema';constserver=newApolloServer({schema:makeExecutableSchema({typeDefs,resolvers,}),context:async({req})=>({user:awaitgetUser(req.headers.authorization)})})exportasyncfunctionstartApolloServer(){awaitserver.start();constapp=WebApp.connectHandlers;server.applyMiddleware({app,cors:true});}// main.jsimport{startApolloServer}from'./apollo';functioninsertLink({title,url}){LinksCollection.insert({title,url,createdAt:newDate()});}try{startApolloServer().then();}catch(e){console.error(e.reason);}

3. Update your resolvers and queries

Almost everything now is async in Apollo, so you will need to update your resolvers and queries withasync keyword before them like this:

constresolvers={Query:{getLink:async(obj,{id})=>LinksCollection.findOne(id),getLinks:async()=>LinksCollection.find().fetch()}};

And that should be it! That is if you have a very simple setup. Changes are that you will need to dive in, especially in updating your options for Apollo, so don't forget to check withthe Apollo Server changelog for all the details.

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