我正在使用 Yajra Datatables 查询服务器端的用户列表。我添加了所有依赖项，但按钮未显示。按钮是复制、PDF、CSV，甚至显示自定义按钮。我尝试过使用不同版本的 JQuery 但仍然没有任何结果。当我刚刚使用来自视图的数据数组初始化数据表时，按钮显示并且工作正常，但是当我添加来自路由和服务器端的数据源时，按钮不显示。有什么东西不见了吗？下面是我的服务器端处理代码，未显示按钮。我在调试时也没有收到控制台错误。

数据源

public function index(Request $request)


    if ($request->ajax()) {

    $users = User::select(
        "users.id", 
        "users.first_name",
        "users.last_name",
        "users.email",
        "users.created_at",
        "roles.name as role_name")
        ->join("roles", "roles.id", "=", "users.role_id")
        ->where("users.status", "=", 1)
        ->get();

        return Datatables::of($users)
                ->addIndexColumn()
                ->make(true);
    }

        return view('users/index');
}

表格

<table id="example1" class="table table-bordered table-striped">
                              <thead>
                                <tr>
                                  <th>Email</th>
                                  <th>First Name</th>
                                  <th>Last Name</th>
                                  <th>Date Added</th>
                                </tr>
                              </thead>
                              <tbody>

                              </tbody>
                            </table>

<script>
  $(function () {
$("#example1").DataTable({
    processing: true,
    serverSide: true,
    ajax: {
            url: '{{ route('users.home') }}',
        },
    columns: [
        {data: 'email', name: 'email'},
        {data: 'first_name', name: 'first_name'},
        {data: 'last_name', name: 'last_name'},
        {
            data: "created_at",
            "render": function (value) {
                if (value === null) return "";
                return moment(value).format('DD/MM/YYYY');
            }
        }
    ],
  "responsive": false, "lengthChange": false, "autoWidth": false,
  "buttons": ["copy", "csv", "excel", "pdf", "print", "colvis"]
}).buttons().container().appendTo('#example1_wrapper .col-md-6:eq(0)');
  });
</script>

下面是我的 CSS 和 JS 库

CSS

<link rel="stylesheet" href="{{ asset('plugins/datatables-bs4/css/dataTables.bootstrap4.min.css') }}">
<link rel="stylesheet" href="{{ asset('plugins/datatables-responsive/css/responsive.bootstrap4.min.css') }}">
<link rel="stylesheet" href="{{ asset('plugins/datatables-buttons/css/buttons.bootstrap4.min.css') }}">

JS

<script src="{{ asset('plugins/datatables/jquery.dataTables.min.js') }}"></script>
<script src="{{ asset('plugins/datatables-buttons/js/dataTables.buttons.min.js') }}"></script>
<script src="{{ asset('plugins/jszip/jszip.min.js') }}"></script>
<script src="{{ asset('plugins/pdfmake/pdfmake.min.js') }}"></script>
<script src="{{ asset('plugins/pdfmake/vfs_fonts.js') }}"></script>
<script src="{{ asset('plugins/datatables-buttons/js/buttons.html5.min.js') }}"></script>

当我使用 php 或blade 循环浏览表格时，按钮将显示：

<?php
                    if(isset($users) && count($users)>0){ 
                      ?>
                            <table id="example1" class="table table-bordered table-striped">
                              <thead>
                                <tr>
                                  <th>Email</th>
                                  <th>First Name</th>
                                  <th>Last Name</th>
                                </tr>
                              </thead>
                              <tbody>
                      <?php

                      foreach($users as $user){ 
                      ?>
                                <tr>
                                  <td><?php echo $user['email']; ?></td>
                                  <td><?php echo $user['first_name']; ?></td>
                                  <td><?php echo $user['last_name']; ?></td>
                                </tr>




                      <?php
                        
                      } ?>

                              </tbody>
                            </table>
                            <?php
                                  }else {
                                    echo "No Users Available";
                                  }
                    ?>

表初始化

<script>
    $("#example1").DataTable({
  "responsive": true, "lengthChange": false, "autoWidth": false,
  "buttons": ["copy", "csv", "excel", "pdf", "print", "colvis"]
}).buttons().container().appendTo('#example1_wrapper .col-md-6:eq(0)');


});
</script>