3-30-2019: "TypeError: apollo.graphqlExpress is not a function"

[vlhobbs]

Hello! I came across the article on learn.pusher.com recently. I wanted to let you know that the backend will not run properly when used with the current versions of Apollo Server. Attempting to run this with NPM 6.7 gave very little guidance, but when I used Yarn 1.15 to try again, I got the following error messages:

$ node ./bin/www
/home/user/WebDev/React/pusher-mud-backend/app.js:23
app.use('/graphql', apollo.graphqlExpress({ schema: graphqlSchema }));
                           ^

TypeError: apollo.graphqlExpress is not a function
    at Object.<anonymous> (/home/user/WebDev/React/pusher-mud-backend/app.js:23:28)
    at Module._compile (internal/modules/cjs/loader.js:805:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:816:10)
    at Module.load (internal/modules/cjs/loader.js:672:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:612:12)
    at Function.Module._load (internal/modules/cjs/loader.js:604:3)
    at Module.require (internal/modules/cjs/loader.js:711:19)
    at require (internal/modules/cjs/helpers.js:14:16)
    at Object.<anonymous> (/home/user/WebDev/React/pusher-mud-backend/bin/www:7:11)
    at Module._compile (internal/modules/cjs/loader.js:805:30)
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

This seems to have something to do with the differences between Apollo Graphql versions 1.0 and 2.0 - I am using 2.4.8 at the moment. I am new to the software and have just started to research, but this site talks about the differences: Migration to 2.0.

Thanks for the great article!