extending types?

[chrisdrackett]

I'm getting the following error:

Mutation was already defined and imported as a type, check the docs for extending types

when I look in the docs I don't see anything about extendType and assumed I just needed to reuse schema.mutationType. Is there a recommended way to do this? what would be the "main" mutation that I extend now that I don't have a central file that is pulling in all my types?

[chrisdrackett]

related / unrelated, it might be nice to have extendMutation and extendQuery. It was nice when using schema.queryType to not have to worry about adding a type.

[greywolvesco]

I'm getting the same error. I want to split types, queries, mutations into files categorizing by modules, the final structure would look somehow like this:
...

• api
  -- graphql
  --- modules
  ---- User.ts (includes type, queries, and mutations)
  ---- Profile.ts
  ---- Role.ts
  ---- ...
  --- Mutations.ts (mutations that combine multiple types)
  --- Queries.ts (same approach as above)
  -- app.ts
• prisma
  ...
  Is it currently possible? Any best practices?

[chrisdrackett]

I currently have a base file like so:

base.ts

import { schema } from 'nexus'

// base Query type, extended in schemas as needed
schema.queryType({
  definition: () => {},
})

// base Mutation type, extended in schemas as needed
schema.mutationType({
  definition: () => {},
})

then in all my other files I have:

User.ts

schema.extendType({
  type: 'Query',
  definition: (t) => {
    t.field('me', {
      type: 'User',
      nullable: true,
      resolve: async (_parent, _args, { db, userId }) => {
        return await db.user.findOne({ where: { id: userId } })
      },
    })
  },
})

schema.extendType({
  type: 'Mutation',
  definition: (t) => {
    t.field('updateUser', {
      type: 'User',
      args: { name: schema.stringArg({ required: true }) },
      resolve: async (_parent, { name }, { db, userId }) => {
        return await db.user.update({
          where: { id: userId },
          data: { name },
        })
      },
    })
  },
})

[greywolvesco]

Works like a charm, thanks!

[Weakky]

Worth pointing out that you don't even need these "base" types. If you extend a type that does not exist, Nexus will create it instead!