Cannot validate q-datetime as required

[jigarzon]

Hi,
I’m having a q-datetime inside a q-field and trying to validate it as required:

<q-field label="Due date"
    :error="$v.entity.period_repetition_config.due_date.$error"
    errorLabel="Required!">
    <q-datetime v-model="entity.period_repetition_config.due_date"
        type="date"
        @input="$v.entity.period_repetition_config.due_date.$touch"
        @blur="$v.entity.period_repetition_config.due_date.$touch"
        format="DD/MM/YYYY" />
</q-field>

My validation config is:

  validations: {
    entity: {
      period_repetition_config: {
        due_date: {
          required
        }
      },
    }
  },

The problem is after setting a date the field still shows the required error label.
Thanks!