[Vue警告]：渲染错误：“ TypeError：无法使用'in'运算符搜索未定义的'form'”

Question

我正在使用laravel 5.7和vuejs2

开发一个管理面板项目。

这是表单时出现的错误

错误： [Vue警告]：渲染错误：“ TypeError：无法使用'in'运算符搜索未定义的'form' 在发现 --->在resources / js / components / Users.vue        

这是Users.vue的完整代码：

<template>
    <div class="container">
      <div class="row mt-5">
          <div class="col-md-12">
            <div class="card">
              <div class="card-header">
                <h3 class="card-title">Users List</h3>

                <div class="card-tools">
                    <button class="btn btn-success " data-toggle="modal" data-target="#addNew">Add User
                        <i class="fas fa fa-user-plus fa-fw"></i>
                    </button>
                </div>
              </div>
              <!-- /.card-header -->
              <div class="card-body table-responsive p-0">
                <table class="table table-hover">
                  <thead>
                    <tr>
                      <th>ID</th>
                      <th>Name</th>
                      <th>Email</th>
                      <th>Type</th>
                      <th>Modify</th>
                    </tr>
                  </thead>
                  <tbody>
                    <tr>
                      <td>183</td>
                      <td>John Doe</td>
                      <td>11-7-2014</td>
                      <td><span class="tag tag-success">Approved</span></td>
                      <td>
                          <a href="#">
                              <i class="fa fa-edit"></i>
                          </a>
                          | |
                          <a href="#">
                              <i class="fa fa-trash red"></i>
                          </a>
                      </td>
                    </tr>


                  </tbody>
                </table>
              </div>
              <!-- /.card-body -->
            </div>
            <!-- /.card -->
          </div>
        </div>


        <!-- Modal -->
            <div class="modal fade" id="addNew" tabindex="-1" role="dialog" aria-labelledby="addNewLabel" aria-hidden="true">
                <div class="modal-dialog modal-dialog-centered" role="document">
                    <div class="modal-content">
                    <div class="modal-header">
                        <h5 class="modal-title" id="addNewLabel">Add New</h5>
                        <button type="button" class="close" data-dismiss="modal" aria-label="Close">
                        <span aria-hidden="true">&times;</span>
                        </button>
                    </div>
                    <div class="modal-body">
                       <div class="form-group">
                            <input v-model="form.name" type="text" name="name"
                                 placeholder="Name"
                                class="form-control" :class="{ 'is-invalid': form.errors.has('name') }">
                            <has-error :form="form" field="name"></has-error>
                        </div>
                    </div>
                    <div class="modal-footer">
                        <button type="button" class="btn btn-danger" data-dismiss="modal">Close</button>
                        <button type="button" class="btn btn-primary">Create</button>
                    </div>
                    </div>
                </div>
            </div>
    </div>

</template>

<script>
    export default {

        data(){
            return
            {
                form: new Form({
                    name: '',
                    email: '',           
                    email_verified_at: '',
                    password: ''
                })
            }
        },

        mounted() {
            console.log('Component mounted.')
        }
    }
</script>

每当我要添加表单（粗体字母）时，都会显示错误。

有什么解决办法吗？谢谢进阶