Apply validation to custom field

System Information
  • Strapi Version: 4.9.0
  • Operating System: Windows10
  • Database: MySQL
  • Node Version: 16.16.0
  • NPM Version: 8.11.0
  • Yarn Version: -

Hey all,

I am facing an issue after adding validation to the custom fields. I have read the docs and followed the example on adding yup validations to a custom plugin field but it isn’t working for me.

This is the plugin register code which I am using:

  name: "custom-slug",
  pluginId: "custom-slug",
  type: "string",
  intlLabel: {
    id: "slug.form.label",
    defaultMessage: "Slug Custom Field",
  intlDescription: {
    id: "slug.form.description",
    defaultMessage: "Autogenerated Custom Slug",
  icon: PluginIcon,
  components: {
    Input: async () =>
        /* webpackChunkName: "input-component" */ "./components/Input"
  options: {
    base: [],
    advanced: [
        sectionTitle: {
          id: 'global.settings',
          defaultMessage: 'Settings',
        items: [
            name: 'required',
            type: 'checkbox',
            intlLabel: {
              id: 'form.attribute.item.requiredField',
              defaultMessage: 'Required field',
            description: {
              id: 'form.attribute.item.requiredField.description',
              defaultMessage: "You won't be able to create an entry if this field is empty",
    validator: args => ({
     required: yup.boolean({
        defaultMessage: "This field is required",

Has anyone really applied validations to their custom developed plugin field? Also, I would like to have a unique field value validation too with it.

Any help would be appreciated.