title: How can validate inputs inside v-for?
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  <p>I have <code>this.userGroups</code></p>
  <blockquote>
  <p>[ { &quot;id&quot;: 46, &quot;group_id&quot;: 38, &quot;url&quot;: &quot;1&quot;, &quot;url_num&quot;: 1, &quot;max_iteration&quot;: 2 }, { &quot;id&quot;: 45, &quot;group_id&quot;: 38, &quot;url&quot;: &quot;2&quot;, &quot;url_num&quot;: 1, &quot;max_iteration&quot;: 2 }, { &quot;id&quot;: 44, &quot;group_id&quot;: 38, &quot;url&quot;: &quot;3&quot;, &quot;url_num&quot;: 1, &quot;max_iteration&quot;: 2 }, { &quot;id&quot;: 43, &quot;group_id&quot;: 38, &quot;url&quot;: &quot;4&quot;, &quot;url_num&quot;: 1, &quot;max_iteration&quot;: 2 } ]</p>
  </blockquote>
  <pre><code>&lt;v-row v-for=&quot;(urlGroup, index) in urlGroups&quot; :key=&quot;index&quot;&gt;
      &lt;v-col cols=&quot;12&quot; sm=&quot;6&quot; md=&quot;3&quot;&gt;
          &lt;v-text-field required v-model=&quot;urlGroup.url&quot; label=&quot;URL&quot; clear-icon=&quot;mdi-close-circle&quot; clearable type=&quot;text&quot; @click:clear=&quot;removeUrl(index)&quot;&gt;&lt;/v-text-field&gt;
      &lt;/v-col&gt;
  &lt;/v-row&gt;
  </code></pre>
  <blockquote>
  <p><code>required</code> doesn't seem to work because I can still submit the form without providing any value. I used to do this in a single text field, but now it's dynamic, I have no idea how to do that.</p>
  </blockquote>
  <pre><code>url: [(v) =&gt; !!v || 'URL is required']
  </code></pre>
  <p><strong>How can I add a validation rule to all of them to be typed URL, and required?</strong></p>