Bug: Duplicate typename error when saving types file

[Cory Deppen]

Description

I'm unsure if these are related, but the schema in a fresh Vite app with Fuse doesn't contain the example user field after running fuse dev and an error is thrown when saving the User.ts file.

pnpm create vite test-fuse --template react-ts
cd test-fuse
pnpm create fuse-app
pnpm fuse dev

The server starts as expected but the user field isn't present in the schema. Hitting save on /types/User.ts throws the following error:

Error when evaluating SSR module /types/User.ts:
|- PothosSchemaError: Duplicate typename: Another type with name User already exists.
    at new PothosError (file:///path/to/node_modules/.pnpm/@pothos+core@3.41.0_graphql@16.8.1/node_modules/@pothos/core/esm/errors.js:4:9)
    at new PothosSchemaError (file:///path/to/node_modules/.pnpm/@pothos+core@3.41.0_graphql@16.8.1/node_modules/@pothos/core/esm/errors.js:10:9)
    at ConfigStore.addTypeConfig (file:///path/to/node_modules/.pnpm/@pothos+core@3.41.0_graphql@16.8.1/node_modules/@pothos/core/esm/config-store.js:116:19)
    at SchemaBuilder.objectType (file:///path/to/node_modules/.pnpm/@pothos+core@3.41.0_graphql@16.8.1/node_modules/@pothos/core/esm/builder.js:59:26)
    at ImplementableLoadableNodeRef.implement (file:///path/to/node_modules/.pnpm/@pothos+core@3.41.0_graphql@16.8.1/node_modules/@pothos/core/esm/refs/object.js:30:29)
    at SchemaBuilder.loadableNode (file:///path/to/node_modules/.pnpm/@pothos+plugin-dataloader@3.17.2_@pothos+core@3.41.0_dataloader@2.2.2_graphql@16.8.1/node_modules/@pothos/plugin-dataloader/esm/schema-builder.js:59:9)
    at Module.node (file:///path/to/node_modules/.pnpm/fuse@0.11.4_next@14.1.0_react@18.2.0_typescript@5.3.3/node_modules/fuse/dist/builder.mjs:183:25)
    at eval (/path/to/types/User.ts:5:40)
    at async instantiateModule (file:///path/to/node_modules/.pnpm/vite@5.0.12/node_modules/vite/dist/node/chunks/dep-9A4-l-43.js:50861:9)

Versions

• TypeScript Version: 5.3.3
• Fuse version: 0.11.4

[Jovi De Croock]

I've followed these exact steps and was not able to reproduce the issue, mind providing a minimal reproducible example?

[Cory Deppen]

The following example app was created using the default Vite template in Stackblitz. I only ran npx create-fuse-app to add Fuse.

https://stackblitz.com/edit/vitejs-vite-1dizhg?file=types%2FUser.ts

Once the app is running, stop the terminal, run npx fuse dev, and then browse to the server once it's running. You should see that the user query field isn't present in the documentation explorer. Making a change to the User.ts file and saving should also display the duplicate typename error in the terminal.

[Jovi De Croock]

Solved in 0.12.1, thank you so much for the reproduction https://stackblitz.com/edit/vitejs-vite-mvvebx?file=package.json