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Please add TypeScript support for `.extend()` method in the z.Schema type
I find it very useful to add my types for Zod schemas, so that if I change the type, TypeScript helps me in highlighting the errors in my broken schemas. But as soon as I assign any schema z.Schema<MyType>
, I can no longer extend this schema.
Here's a detailed example:
- Without
z.Schema<MyType>
specification:
const mySchema = z.object({ ... });
const anotherSchema = mySchema.extend({ ... });
Works just fine, but no highlights if I have my types mismatched with the schema.
- With
z.Schema<MyType>
specification:
const mySchema: z.Schema<MyType> = z.object({ ... });
const anotherSchema = mySchema.extend({ ... });
Here, I have my type definitions connected to Zod schemas, but I can no longer safely extend from mySchema
(by safely, I mean type-safety, if I put @ts-ignore, it works just as expected).
Please suggest a workaround if any exists or add a type support for extend
method in Schema type definition. Thanks!
can't agree more,I asked the question too。https://github.com/colinhacks/zod/issues/1271
You can do this using
const anotherSchema:z.Schema<AnotherType> = mySchema.and(z.object({ ... }));
Also for z.ZodType
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