[Question] Accept null as input value of a schema but not as a valid output

[adelloste]

I have a large schema with several nullable fields. Is there any way to generate the schema, so that the input allows null, while the output does not?

Let's say I have this auto-generated schema:

const Pet = z
    .object({
        id: z.number().int(),
        name: z.string(),
        category: Category.optional(),
        photoUrls: z.array(z.string()),
        tags: z.array(Tag).nullish(),
        status: z.enum(["available", "pending", "sold"]).nullish(),
    });

type PetValues = z.input<typeof Pet>
// {
//     id: number;
//     name: string;
//     category?: Category | undefined;
//     photoUrls: Array<string>;
//     tags?: (Array<Tag> | null) | undefined;
//     status?: ("available" | "pending" | "sold" | null) | undefined;
// };

type PetNotValid = z.output<typeof Pet>
// {
//     id: number;
//     name: string;
//     category?: Category | undefined;
//     photoUrls: Array<string>;
//     tags?: (Array<Tag> | null) | undefined;                          // <-- don't want null
//     status?: ("available" | "pending" | "sold" | null) | undefined;  // <-- don't want null
// };

I can achieve this with a transform:

const Pet = z
    .object({
        id: z.number().int(),
        name: z.string(),
        category: Category.optional(),
        photoUrls: z.array(z.string()),
        tags: z.array(Tag).nullish().transform((value) => value ?? undefined),
        status: z.enum(["available", "pending", "sold"]).nullish().transform((value) => value ?? undefined),
    });

type PetValid = z.output<typeof Pet>
// {
//     id: number;
//     name: string;
//     category?: Category | undefined;
//     photoUrls: Array<string>;
//     tags?: Array<Tag> | undefined;                          // <-- removed null
//     status?: "available" | "pending" | "sold" | undefined;  // <-- removed null
// };

In this way null values pass the validation and after tranform it to undefined, so that zod remove the fields from the output.
How can I achieve this by editing the template.hbs?