变量存在时未定义的变量 laravel

Posted 2023-02-22

【中文标题】变量存在时未定义的变量 laravel

【英文标题】：undefined variable when the variable exists laravel

【发布时间】：2020-11-04 01:50:37

【问题描述】：

当我单击删除所有选择的它说未定义的变量时，但是当我检查数据库时，帖子被删除，当我刷新页面时，帖子被从页面中删除。我不明白为什么它在工作时会出错。

刀片

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/js/bootstrap.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-confirmation/1.0.5/bootstrap-confirmation.min.js"></script>
<meta name="csrf-token" content=" csrf_token() ">

删除所有选择 帖子名称 帖子详情 行动 @foreach($posts as $key => $post) id"> id"> ++$key $post->关于 $post->图像 id" class="btn btn-danger btn-sm" data-tr="tr_$post->id" 数据切换=“确认” data-btn-ok-label="删除" data-btn-ok-icon="fa fa-remove" 数据-btn-ok-class="btn btn-sm btn-danger" data-btn-cancel-label="取消" data-btn-cancel-icon="fa fa-chevron-circle-left" data-btn-cancel-class="btn btn-sm btn-default" data-title="你确定要删除吗？" 数据放置=“左”数据单例=“真”> 删除 @endforeach

<script type="text/javascript">
    $(document).ready(function () 


        $('#master').on('click', function(e) 
         if($(this).is(':checked',true))
         
            $(".sub_chk").prop('checked', true);
          else 
            $(".sub_chk").prop('checked',false);
         
        );


        $('.delete_all').on('click', function(e) 


            var allVals = [];
            $(".sub_chk:checked").each(function() 
                allVals.push($(this).attr('data-id'));
            );


            if(allVals.length <=0)
            
                alert("Please select row.");
              else 


                var check = confirm("Are you sure you want to delete this row?");
                if(check == true)


                    var join_selected_values = allVals.join(",");


                    $.ajax(
                        url: $(this).data('url'),
                        type: 'DELETE',
                        headers: 'X-CSRF-TOKEN': $('meta[name="csrf-token"]').attr('content'),
                        data: 'ids='+join_selected_values,
                        success: function (data) 
                            if (data['success']) 
                                $(".sub_chk:checked").each(function() 
                                    $(this).parents("tr").remove();
                                );
                                alert(data['success']);
                             else if (data['error']) 
                                alert(data['error']);
                             else 
                                alert('Whoops Something went wrong!!');
                            
                        ,
                        error: function (data) 
                            alert(data.responseText);
                        
                    );


                  $.each(allVals, function( index, value ) 
                      $('table tr').filter("[data-row-id='" + value + "']").remove();
                  );
                
            
        );


        $('[data-toggle=confirmation]').confirmation(
            rootSelector: '[data-toggle=confirmation]',
            onConfirm: function (event, element) 
                element.trigger('confirm');
            
        );


        $(document).on('confirm', function (e) 
            var ele = e.target;
            e.preventDefault();


            $.ajax(
                url: ele.href,
                type: 'DELETE',
                headers: 'X-CSRF-TOKEN': $('meta[name="csrf-token"]').attr('content'),
                success: function (data) 
                    if (data['success']) 
                        $("#" + data['tr']).slideUp("slow");
                        alert(data['success']);
                     else if (data['error']) 
                        alert(data['error']);
                     else 
                        alert('Whoops Something went wrong!!');
                    
                ,
                error: function (data) 
                    alert(data.responseText);
                
            );


            return false;
        );
    );
</script>


</html>

```

控制器

public function showem(Post $post)

  $posts = Post::get();
  


  return view('users.registered', compact('posts'));

public function deleteAll(Request $request)

    $ids = $request->ids;
    $deleted = Post::whereIn('id',explode(",",$ids))->delete();
    return view('users.registered');

【问题讨论】：

此处未定义哪个变量？

抱歉仍在编辑问题。 $post 变量

请同时显示控制器代码。

@aynber 控制器添加

@STA 错误的图片已添加到帖子中

【参考方案1】：

在一次又一次地查看您的完整问题后，我发现您在 detele 方法上遇到了这个错误。 您还需要在删除方法上发送posts 变量：

public function showem(Post $post)

    $posts = Post::get();
    return view('users.registered', compact('posts'));


public function deleteAll(Request $request)

    $ids = $request->ids;
    $deleted = Post::whereIn('id',explode(",",$ids))->delete();
    $posts = Post::get();
    return view('users.registered', compact('posts')); // here send the posts variable