Type Alias deepNonNullable<T, Atom>

deepNonNullable: T extends Primitive
    ? T
    : T extends Atom
        ? T
        : T extends readonly unknown[]
            ? { [I in keyof T]: deepNonNullable<T[I], Atom> }
            : T extends object
                ? { -readonly [K in keyof T]: null
                | deepNonNullable<T[K], Atom> }
                : T

`deepNonNullable`

Converts an arbitrary zod schema into its "deeply-partial" form.

That just means that the schema will be traversed, and wrap all z.object z.object properties with z.nullable z.nullable.

Any properties that were already nullable will be left as-is, since re-wrapping again doesn't do anything except make the schema's type harder to read.

Options

zx.deepNonNullable's behavior is configurable at the typelevel via the defaults.typelevel options.typelevel property:

defaults.typelevel "semantic" (default): leave the schema untouched, but wrap it in a no-op interface (zx.deepNonNullable.Semantic) to make things explicit
defaults.typelevel "applyToTypesOnly": apply the transformation to the schema's output type and wrap it in z.ZodType z.ZodType
defaults.typelevel "preserveSchemaType": zx.deepNonNullable will return what it got, type untouched

Type Parameters

T
Atom = Atoms[number]

Example

import * as vi from "vitest"
import { z } from "zod"
import { zx } from "@traversable/zod"

// Using `zx.deepNonNullable.writeable` here to make it easier to visualize `zx.deepNonNullable`'s behavior:
vi.expect.soft(zx.deepNonNullable.writeable(
  z.object({
    a: z.number(),
    b: z.nullable(z.string()),
    c: z.object({
      d: z.array(z.object({
        e: z.number().max(1),
        f: z.boolean()
      })).length(10)
    })
  })
)).toMatchInlineSnapshot
  (`
  "z.object({
    a: z.number().nullable(),
    b: z.string().nullable(),
    c: z.object({
      d: z.array(z.object({
        e: z.number().max(1).nullable(),
        f: z.boolean().nullable()
      })).length(10).nullable()
    }).nullable()
  })"
  `)