From Discord: Runtime Error When Extending Object with Optional Keys in TypeScript

[effect-bot]

Summary

Summary

The user is encountering a runtime error when attempting to extend an object with optional keys using TypeScript and the @effect/schema library. The provided code snippet defines a schema Foo with an optional foo property that has a default value. The schema is then extended with a union of two structures, each containing optional properties bar and baz. This results in a runtime error indicating unsupported schema or overlapping types.

Key Takeaways

1. Code Context:

   • The user is defining a schema Foo with an optional property foo.
   • The schema is extended with a union of two structures, each containing optional properties bar and baz.

2. Error Details:

   • The error message indicates that extending the schema with the given union results in unsupported schema or overlapping types.
   • The specific error occurs at node_modules/@effect/schema/dist/esm/Schema.js:1362:9.

3. Possible Bug:

   • The user suspects that this might be a bug in the @effect/schema library.

4. Technical Insight:

   • The error suggests that the library might have limitations or issues when handling extensions involving optional keys and unions.

Conclusion

The user is facing a runtime error when extending a schema with optional keys using the @effect/schema library. The error message points to unsupported schema or overlapping types, and the user suspects this might be a bug in the library.

Discord thread

https://discord.com/channels/795981131316985866/1256309278432563243