feat: support custom resolvers

[craigspaeth]

This is an attempt at addressing some issues people are raising for the desire to hook into the CRUD operations. It solves this with middleware that can be used like so...

t.crud.createOneUser({
  middleware: async (root, args, ctx, info, next) => {
    // Something before
    const res = await next()
    // Something after
    return res
  }
})

I'm very open to an alternative implementation like before and after or whatever you all recommend. Whatever shape it takes hooking into the CRUD lifecycle is a feature I'd love to see in this plugin.

This code works for me but two weird things happened when I tried to write a test and clean this up...

1. I got a segfault trying to run tests

/bin/sh: line 1: 89527 Segmentation fault: 11  ts-node tests/__ensure-engine
error Command failed with exit code 139.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

2. A bunch of formatting noise got caught in my PR even though I turned off my linter/prettier. Maybe this is because of a git hook or something I'm not seeing?

Let me know what I can do to work past this and get this into a mergeable state.

Update:

Closes #684, #541, #550

[Weakky]

Hey @craigspaeth,

We've taken the liberty to update your PR and get it into a mergeable state. We've also made some modification to your original proposal:

• middleware has been renamed to resolve. The feature is not a middleware per se as it completely replaces the original resolver and optionally wraps it. There's no stack involved. It also makes the feature integrate seamlessly with the Nexus Schema resolve API
• We've made it available on t.model as well
• We've renamed next to originalResolve
• We've updated the typegen so that we get nice type-safety on the resolve method for the root, args, ctx params, but also on the same parameters expected by the originalResolver

Usage

queryType({
  definition(t) {
    t.crud.users({
      async resolve(root, args, ctx, info, originalResolve) {
        console.log('before')
        const res = await originalResolve(root, args, ctx, info)
        console.log('after')
        return res 
      }
    })
  }
})

[jasonkuhrt]

🎉

[Weakky]

@craigspaeth Thanks a lot for leading that effort, merging now 🚀

[craigspaeth]

Wow—amazing, thank you so much @Weakky and team! ❤️ 🚀