Can Gatsby infer the structure and create GraphQL types automatically from data returned by a resolver

I’ve written a custom resolver that returns a data which is a nested mix of arrays and objects. It seems that I need to explicitly define a type for each nested object, something like this for just one CustomAuthor object:

exports.createSchemaCustomization = ({ actions }) => {
    const { createTypes } = actions;
    const typeDefs = `
        type ProcessedHits implements Node {
          name: String,
        }
        
        type CustomAuthor { 
            author: String,
            hits: Int
        }
      `;
    createTypes(typeDefs);
};

exports.createResolvers = ({ createResolvers }) => {
    const resolvers = {
        ProcessedHits: {
            custom: {
                type: "CustomAuthor",
                resolve(source, args, context, info) {
                    const posts = context.nodeModel.getAllNodes({ type: "Post" });
                    ...
                    return { author: 'John', hits: 3};
                },
            },
        },
    };
    createResolvers(resolvers);
};

Is there any way, like helper or something, for Gatsby to infer types from the returned data?

As you can imagine, if an object is deeply nested it’s going to be a lot of type definitions simply for the purpose of making graphql work.

[blainekasten]

Thanks for reporting ya’ll! I’ve assigned to @vladar who leads development on our graphql code. He’ll be able to discuss and find out solutions here. 💜

[vladar]

We’re marking this issue as answered and closing it for now but please feel free to reopen this and comment if you would like to continue this discussion. We hope we managed to help and thank you for using Gatsby! 💜

If you decide to open a PR with inferType utility, please just mention me in the PR description!