How to get a Nested Field and make it Non Plural (without mutating the original TC)?

[tasoskakour]

Hey all!

My Schema:

const CommentSchema = {
            ... 
            _id: String,
}

const PostSchema = {
         ...,
         comments:  [CommentSchema]
}

const RootSchema = new mongoose.Schema(
     {
           ...., 
           posts: [Post]
     }
)

What I want to achieve?

I want to create a mutation, let's call it getCommentById where I need to fetch a particular comment by comment._id and return a that comment. So the return type of the resolver must be Comment (non plural).

The resolver will be a custom one, and I'm fine by it, I already made it work. However I have trouble with setting the resolver type by recomposing the RootTC (I don't want to write it by hand because it kinda miss the purpose of this library).

Technically what I want to do is to get posts.comments field from RootSchema and makeItNonPlural without modifying the initial RootTC object.

My Code:

const RootTC = composeMongoose(RootSchema);

schemaComposer.Mutation.addFields({ 
       ...,
       // My custom resolver:
                getCommentById: RootTC.addResolver({
                    name: 'getCommentById',
                    args: {
                        commentId: 'String!'
                    },
                    type: `${RootTC.getFieldOTC('posts') // Here is the problem
                    .makeFieldNonPlural('comments')   // It looks like I'm modifying the RootTC
                    .getFieldType('comments')}`,  // However I just need this type for this resolver one-off.
                    resolve: myCustomResolver,  
          }).getResolver('getCommentById'),
})

Any help is appreciated! :-)

[nodkz]

I think it is better to write your resolver manually without using unclear wrappers and resolvers.

The resolver will be a custom one, and I'm fine by it, I already made it work. However I have trouble with setting the resolver type by recomposing the RootTC (I don't want to write it by hand because it kinda miss the purpose of this library).

If you change the type internals (some field inside it) it must have another name. So you need clone type with a new name, modify it and use it in your resolver.