Sanity Advanced Validators

[EricWVGG]

Just published a new suite of fancy custom validators: https://www.sanity.io/plugins/sanity-advanced-validators

I've been using them for a couple years now, finally got around to turning them into a proper package.

ex. Imagine that you’ve got a document that has an optional video file, but…

• it’s required on the /about page
• if the video exists, it must be either MP4 or MOV
• and there must be a poster image that's between 1250x800 and 2500x1600 pixels in size

const Page = defineType({
  name: "page",
  type: "document",
  fields: [
    defineField({
      name: 'slug',
      type: 'slug'
    }),
    defineField({
      name: "someVideoFile",
      type: "file",
      validation: (rule) =>
        rule.custom(requiredIfSlugEq('about'))
          .custom(fileExtension(['mp4', 'mov']))
    })
    defineField({
      name: "posterImage",
      type: "image",
      hidden: ({ parent }) => parent.someVideoFile === null,
      validation: (rule) =>
        rule.custom(requiredIfSiblingNeq('someVideoFile', null))
          .custom(minDimensions({ x: 1250, y: 800 }))
          .custom(maxDimensions({ x: 2500, y: 1600 })),
    })
  ]
})