“You are binding v-model directly to a v-for iteration alias”

Question

Just run into this error I hadn\'t encountered before: \"You are binding v-model directly to a v-for iteration alias. This will not be able to modify the v-for source array

Answer 1

Since you're using v-model, you expect to be able to update the run value from the input field (text-field is a component based on text input field, I assume).

The message is telling you that you can't directly modify a v-for alias (which run is). Instead you can use index to refer to the desired element. You would similarly use index in removeRun.

new Vue({
  el: '#app',
  data: {
    settings: {
      runs: [1, 2, 3]
    }
  },
  methods: {
    removeRun: function(i) {
      console.log("Remove", i);
      this.settings.runs.splice(i,1);
    }
  }
});

<script src="//cdnjs.cloudflare.com/ajax/libs/vue/2.5.18/vue.js"></script>
<table id="app">
  <tr v-for="(run, index) in settings.runs">
    <td>
      <input type="text" :name="'run'+index" v-model="settings.runs[index]" />
    </td>
    <td>
      <button @click.prevent="removeRun(index)">X</button>
    </td>
    <td>{{run}}</td>
  </tr>
</table>