2

我遇到的问题是由于input我第一次为 设置值时正在运行的事件v-model，这些数据是通过 API 加载的；我理解为什么表单被设置为脏（因为它正在被更改）但这会导致我拥有的另一个组件出现问题，该组件检查$v.$anyDirty标志是否设置为 true，如果是，则创建一个弹出窗口说“你是确定要离开”，但$v.reset()在加载数据后调用不起作用。

Vue.use(vuelidate.default);
const { required } = window.validators;
new Vue({
  el: "#app",
  data: {
    todos: [],
    todo: ""
  },
  async created() {
    var data = await axios.get("https://jsonplaceholder.typicode.com/todos");
    this.todos = data.data.map(d => d.id);
    this.todo = this.todos[0];
    this.$v.$reset()
  },
  validations() {
    return {
      todo: { required }
    };
  }
});
<link href="https://unpkg.com/bootstrap-vue@2.0.0-rc.11/dist/bootstrap-vue.css" rel="stylesheet"/>
<link href="https://unpkg.com/bootstrap@4.1.3/dist/css/bootstrap.min.css" rel="stylesheet"/>

<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
<script src="https://unpkg.com/bootstrap-vue@2.0.0-rc.11/dist/bootstrap-vue.min.js"></script>
<script src="https://unpkg.com/vuelidate@0.7.4/dist/validators.min.js"></script>
<script src="https://unpkg.com/vuelidate@0.7.4/dist/vuelidate.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/axios/0.18.0/axios.js"></script>



<div id='app'>
  <div class="row">
    <div class="col-md-4">
      <b-form-select v-model="$v.todo.$model" :options="todos"></b-form-select>
    </div>
    <div class="col-md-8">
      <code>
        $anyDirty: {{$v.$anyDirty}}
      </code>
    </div>
  </div>
</div>

4

1 回答 1

1

问题是$v.reset()在 vue 渲染之前运行，所以输入事件发生在之后，所以堆栈跟踪看起来像这样

加载 > 设置值 > 重置验证 > 渲染 > 输入事件

您需要将重置放在里面Vue.nextTick，然后它会起作用，因为它会将执行更改为

加载 > 设置值 > 渲染 > 输入事件 > 重置验证

Vue.use(vuelidate.default);
const {
  required
} = window.validators;
new Vue({
  el: "#app",
  data: {
    todos: [],
    todo: ""
  },
  async created() {
    var data = await axios.get("https://jsonplaceholder.typicode.com/todos");
    this.todos = data.data.map(d => d.id);
    this.todo = this.todos[0];
    Vue.nextTick(() => {
      this.$v.$reset()
    })
  },
  validations() {
    return {
      todo: {
        required
      }
    };
  }
});
<link href="https://unpkg.com/bootstrap-vue@2.0.0-rc.11/dist/bootstrap-vue.css" rel="stylesheet" />
<link href="https://unpkg.com/bootstrap@4.1.3/dist/css/bootstrap.min.css" rel="stylesheet" />

<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
<script src="https://unpkg.com/bootstrap-vue@2.0.0-rc.11/dist/bootstrap-vue.min.js"></script>
<script src="https://unpkg.com/vuelidate@0.7.4/dist/validators.min.js"></script>
<script src="https://unpkg.com/vuelidate@0.7.4/dist/vuelidate.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/axios/0.18.0/axios.js"></script>



<div id='app'>
  <div class="row">
    <div class="col-md-4">
      <b-form-select v-model="$v.todo.$model" :options="todos"></b-form-select>
    </div>
    <div class="col-md-8">
      <code>
        $anyDirty: {{$v.$anyDirty}}
      </code>
    </div>
  </div>
</div>

作为注释，您也可以Vue.nextTick调用this.$nextTick

于 2019-03-08T09:16:38.787 回答