Rule.fields not usable for nested data structures

[blended-bram]

Describe the bug

The Rule.fields(...) validation API does not work inside of Rule.all for a field validation rule:

To Reproduce

defineType({
  type: 'object',
  name: 'my.entry',
  fields: [
    defineField({ name: 'name', type: 'string' }),
    defineField({ name: 'label', type: 'string' }),
  ],
})

defineType({
  type: 'document',
  name: 'my.document',
  fields: [
    defineField({
      type: 'my.entry',
      validation: Rule => Rule.all([
        Rule.required(),
        Rule.fields({ 
          name: Rule.required(),
          label: Rule.required(),
        }),
      ]),
    }),
  ],
})

Expected behavior

The validation rules of Rule.fields applies to the fields of the nested data structure.
Instead, the document is publish-able with empty name and label fields.

Screenshots

N/A

Which versions of Sanity are you using?

(I reviewed the code related to validation, it seems that the latest code does not support the nested field validations)

   ╭──────────────────────────────────────────╮
   │                                          │
   │    Update available 3.62.0 → 3.70.0      │
   │   Run npm update @sanity/cli to update   │
   │                                          │
   ╰──────────────────────────────────────────╯

@sanity/cli (global)                   3.62.0 (latest: 3.70.0)
@sanity/document-internationalization   3.1.0 (latest: 3.3.1)
@sanity/eslint-config-studio            2.0.4 (latest: 5.0.1)
@sanity/icons                          2.11.8 (latest: 3.5.7)
@sanity/language-filter                 3.2.2 (latest: 4.0.3)
@sanity/table                           1.1.2 (latest: 1.1.3)
@sanity/uuid                            3.0.2 (up to date)
@sanity/vision                         3.62.0 (latest: 3.70.0)
sanity                                 3.62.0 (latest: 3.70.0)

What operating system are you using?

N/A

Which versions of Node.js / npm are you running?

• npm: 10.9.0
• node: v20.14.0

Additional context

N/A

Security issue?

N/A

[blended-bram]

I have since found out that you can achieve the intended result when setting a field's validation key to an array of validation rules:

validation: [
  Rule => Rule.required(),
  Rule => Rule.fields({
    name: Rule => Rule.required(),
    label: Rule => Rule.required(),
  }),
],

[cngonzalez]

Hi @blended-bram ! I'm glad you've found a workaround. I agree that the Rule.all is not working as I'd expect, and I've filed it as a bug. Thank you for reporting it!