In a current document group I'm trying to find a way to only allow validation when the boolean is set to true:

{
  title: 'Has the movie been released?',
  name: 'released',
  type: 'boolean',
  initialValue: true
}

fooBar.ts:

export default {
  title: 'Foo',
  name: 'foo',
  group: 'general',
  type: 'object',
  fields: [
    {
      title: 'Alpha',
      name: 'alphaBool',
      type: 'boolean',
      description: 'Random text',
      initialValue: false
    },
    {
      title: 'Alpha Location',
      name: 'alphaLoc',
      type: 'string',
      hidden: ({ parent }) => parent?.alphaBool !== true,
      validation: Rule => Rule.required()
    }
  ]
};

but this current implemented approach throws a required error even though it might be set to false. I've tried to see if I could pass down either parent or document from validation so I could attempt to get the value of alphaBool but they both show undefined:

validation: (rule, parent, document) => console.log(rule, parent, document)

but I'm allowed to see parent and document objects in hidden.

Research

• Conditional fields
• Field Groups
• Conditional validation of string
• Boolean
• Now you see them, now you don’t. Introducing Conditional Fields.
• Validation
• Optional validation for hidden fields

In Sanity 2.35.0 how can I run validation only if the boolean value is set to true?

CodePudding user response：

If I correctly understand your question, you can use custom validations for this.

Example:

{
 title: 'Alpha',
 name: 'alphaBool',
 type: 'boolean',
 description: 'Random text',
 initialValue: false
},
{
  title: 'Alpha Location',
  name: 'alphaLoc',
  type: 'string',
  hidden: ({ parent }) => parent?.alphaBool !== true,
  validation: (Rule) => Rule.custom((value, { document: { alphaBool } }) => {
    return alphaBool && !value ? "Field required" : true
  })
}

With Rule.custom, you can access the value of the field and the context object of the document. In this example, if alphaBool is set to true and the current field's value is an empty string, then it will throw a Field required validation message. If alphaBool is false, it will not validate anything.