Is that possible to use vuelidate with q-input inside the q-table

[Stanley]

As you know, it is easy to use vuelidate to validate flat structure. For example:

data () {
  return {
    purOrd: {
      header: {    
        vendor: ''
      },
      items: [
        { material: '' },
        { material: '' }
      ]
    }
  }
}
// vuelidate check
validations: {
  purOrd: {
    header: {
      vendor: { required }
    },
    items: {
      required,
      $each: {
        material: { required }
      }
    }
  }
}
// it is easy to check header data
<q-input v-model="purOrd.header.vendor"
     stack-label="vendor"
     @blur="$v.purOrd.header.vendor.$touch"
     :error="$v.purOrd.header.vendor.$error" />

// but how to check item data
<q-table :data="purOrd.items">
  <q-tr slot="body" slot-scope="props" :props="props">
    <q-td key="material" :props="props">
        <q-input :value="props.row.material"
            @blur="$v.??.$touch"
            :error="$v.??.$error" />

What is the correct syntax to write @blue and :error?
Thanks a lot for your help!