Support Convex Schema

[iammola]

Is your feature request related to a problem? Please describe.
It'll be nice to have an adapter for https://www.convex.dev.

Describe the solution you'd like
An adapter similar to the ones in https://github.com/ciscoheat/sveltekit-superforms/tree/main/src/lib/adapters please

Describe alternatives you've considered
I've written duplicate Schemas with Zod's validators, but would also appreciate a more straightforward approach please.

[ciscoheat]

New adapters are welcome, but remember that it needs to have some JSON Schema representation, otherwise it won't handle nested data well, and will require an extra argument with default values for the form. Most other libraries have either a separate library that converts the schema to JSON Schema, or a built in, customizable method (as with Zod 4 and Arktype).

[iammola]

Okay thanks @ciscoheat. I'll like to open the PR for it! I can go through previous implementations and research more on the separate schema converter.

Is that okay?

[ciscoheat]

No problem, check them out and let me know if you have any questions!

[iammola]

Hey @ciscoheat, sorry for the delay! I didn't have time to look at this through the week.

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To create the convex adapter, I can use a combination of

• Convex's validator - https://github.com/get-convex/convex-helpers/blob/21f174b3e15a6144acd350878c08a8ca80fe95e2/packages/convex-helpers/validators.ts
• Convex's toStandardSchema - https://github.com/get-convex/convex-helpers/blob/dad144a9f1f0e07c2b99500cee7e0a54b89d1b26/packages/convex-helpers/standardSchema.ts
• xsAI's toJSONSchema - https://xsai.js.org/docs/packages-top/xsschema#tojsonschema

And when/if #575 is approved, the conversion to JSON schema wouldn't be needed and can be used directly.

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Another possible solution would be to use Convex's Zod helpers.

https://github.com/get-convex/convex-helpers/blob/0adbb09afe52abcf09c769de63b98b8e505c3ec9/packages/convex-helpers/server/zod.ts

They have an article on their blog (https://stack.convex.dev/typescript-zod-function-validation), the convexToZod function may be my most straightforward solution, or I define the schema in Zod and using that for the validation, and zodToConvex for the actual DB args and models.

And in that case, it won't be necessary to add another adapter for the Convex schema.

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Please let me know what do you think! Do you think it's still necessary to pursue this?

[Tyler-Petrov]

I'll chime in here with my two cents. Most validation libs have many more features than Convex's validation solution. I have all my validators using Valibot, and wrote a converter to Convex's schema. I would even say having a Convex adapter would allow bad practices in some cases, but I digress