elementui el-table里需填写标题 该标题必填判断

<el-form :model="videoForm" :rules="rules" ref="videoForm">
  <el-table          
    class="mt20"
    border
    :data="videoForm.synchronizationTableData"
    >    
    <el-table-column label="稿件标题">
      <template v-slot="scope">
        <el-form-item :prop="'synchronizationTableData[' + scope.$index + '].file_name'" :rules="[{ required: true, message: '请输入稿件标题', trigger: 'blur' }]" style="margin-bottom: 0">
          <el-input size="medium" v-model="scope.row.file_name" placeholder="请输入稿件标题" style="width: 100%;"></el-input>
        </el-form-item>
      </template>
    </el-table-column>                  
  </el-table>
</el-form>  
videoForm: {
  synchronizationTableData: [],
},