title: I got an error [Vue warn]: Error in render: "TypeError: Cannot read property 'name' of undefined"
body: <p>I am working with vue and here is my code </p>
  
  <p>everything is working fine until I submitting the form. when I submit form and try to update emailForm -> tabs -> en -> data -> name then i got an error.</p>
  
  <pre><code>&lt;template&gt;
      &lt;el-form :model="emailForm.tabs" ref="emailForm" class="demo-emailForm" @submit="submitForm('emailForm')"&gt;
          &lt;div v-for="(lan, key, index) in emailForm.tabs"&gt;
          &lt;el-form-item :label="$t('Template Name')" &gt;
              {{lan.data.name}}
         &lt;/el-form-item&gt;
      &lt;el-form&gt;
  &lt;template&gt;
  &lt;script&gt;
          export default {
              data() {
                  return {
                      emailForm: {
                          tabs: {
                              en: {
                                  sortHeand: 'en',
                                  title: 'English',
                                  data: {
                                      name: "ad",
                                      subject: "asda",
                                      html_code: 'asdad',
                                      status: 0
                                  }
                              }
                          }
                      }
                  }
              },
              methods: {
                  submitForm(formName) {
                      this.$refs[formName].validate(valid =&gt; {
                          if (valid) {
                              request({
                                  url: this.getRoute(),
                                  method: "post",
                                  data: this[formName].tabs
                              })
                              .then(response =&gt; {
                                  console.log(response)
                              })
                          }
                      });
                  },
              }
          }
  &lt;/script&gt;
  </code></pre>
  
  <p>Anyone can render this issue ?</p>
  
  <p><a href="https://i.stack.imgur.com/r3TOI.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/r3TOI.png" alt="enter image description here"></a></p>