Incorporate graphql-resolvers project?

[lucasconstantino]

graphql-resolvers project is basically a single-method-project which facilitates resolver composability. It is, in fact, only a small tool. May be it should live on a wider project such as graphql-tools, may be not.

Any thoughts on that?

[AndrewIngram]

Can I ask what this library is providing that a more generic functional toolkit (like Ramda) isn't? Mainly because I use Ramda (or sometimes lodash/fp) for composing resolvers and adding branching logic quite regularly and it seems to work fine.

[lucasconstantino]

Honestly? It doesn't do anything much different, but I could not find any helper in those library which accomplished exactly what I was looking for. Have you looked into graphql-resolvers's code?

At first I wanted to use Ramda's Left/Right to accomplish what this code does, but truth is most people in JavaScript are not yet used to more profound aspects of functional programming, so they would have a hard time to figure out how to benefit from the lib.

Later, I decided to try and use at least some functional helpers such as composeP, which is a promise enabled version of compose, but I realized composition was not what I was looking for. While composition provide each function with the result of the previous, combineResolvers will call each function with the exact same arguments the resolver provides - root, args, context, and info. Furthermore, one function will only get called if the previous returns a no-result - meaning undefined. All that wrapped in a promise run cycle, meaning throw errors will safely be catched and returned to the graphql execution schema.

@AndrewIngram Does this answer clarify it for you? I've been using some functional toolkit my self and well, graphql-resolvers is just a wrap-up of the ideas and tryouts I had in my projects. I would love to see how you have being doing things on your code too :)

[slightlytyler]

Would be awesome to have apollo-resolvers and apollo-errors in the graphql-tools project. Their APIs fit in very nicely

[stubailo]

@lucasconstantino I'd love to add a link to this and also companion packages in the docs - please submit a PR if you are still interested, I think it would help people find that project!

We could make a new section on the resolvers page called "companion tools"!

[stubailo]

I think this is good to close since we added it to the docs. We also have a similar approach with schema directives now.