CODEWITHSUNDEEP
vue.jsbootstrap-vue
Jason WEI
Jason WEI

Reputation: 73

How to validate radio buttons in a b-form-radio-group in vuejs

I have a b-form-radio-group of radio buttons, how can I validate them as one of them must be checked?

Here is a div of b-form-radio-group inside the b-modal

<b-modal id="manageQuantity" title="Manage Quantity" @ok="updateQuantity">
<div class="radio-button">
            <b-form-group
              id="quantityOption"
              label-cols-sm="3"
              label="Option :"
              label-for="input-horizontal"
            >
              <b-form-radio-group
                id="quantityOption"
                class="individual-button"
                buttons
                button-variant="outline-secondary"
                v-model="form.quantityOption"
                :options="quantityOptions"
              ></b-form-radio-group>
            </b-form-group>
            </div>
</b-modal>

When I click "OK" button the b-modal should warn me if I did not select any of the radio button.

Upvotes: 0

Views: 5231

Answers (2)

Hiws
Hiws

Reputation: 10324

In your updateQuantity method you can check if your quantityOptionis set or not.

You could also implement Andriy's answer for a more visual representation, but you still need the check in the event to make sure it's set or not.

<div>
  <b-btn v-b-modal.modal>Open Modal</b-btn>
  <b-modal id="modal" @ok="updateQuantity">
    <b-form-radio-group
    buttons
    button-variant="outline-secondary"
    v-model="form.quantityOption"
    :options="quantityOptions"
    ></b-form-radio-group>
  </b-modal>
</div>



<script>
  data() {
    return {
      form: { quantityOption: null },
      quantityOptions: [ 
        {value: 1, text: '1' },
        {value: 2, text: '2' },
        {value: 3, text: '3' }
      ]
    }
  },
  methods: {
    updateQuantity(event) {
      if(!this.form.quantityOption){
        alert('Please select one of the options first')
        event.preventDefault()
      }
    }
  }
</script>

Upvotes: 0

Andriy Kuba
Andriy Kuba

Reputation: 8263

You need to add state property. You also can use the b-form-invalid-feedback b-form-valid-feedback slots for the messages:

<b-form-radio-group
    id="quantityOption"
    class="individual-button"
    buttons
    button-variant="outline-secondary"
    v-model="form.quantityOption"
    :options="quantityOptions"
    :state="state"
>
    <b-form-invalid-feedback :state="state">Please select one</b-form-invalid-feedback>
    <b-form-valid-feedback :state="state">Thank you</b-form-valid-feedback>
</b-form-radio-group>



....
data(){
    return{
        form:{
            quantityOption: null            
        }
    }
}
...
computed: {
    state() {
        return Boolean(this.form.quantityOption)    
    }
}
...

You could find more in the documentation: https://bootstrap-vue.js.org/docs/components/form-radio/#contextual-state-with-feedback-example

Upvotes: 1

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