Question

我正在尝试使用Laravel应用程序实现jqTree。

Controller获取数据并返回视图：

public function index()
{
    $categories = Category::get(['id', 'name', '_lft', '_rgt', 'parent_id'])->toTree();
    return view('category.index', [
        'categories' => $categories
    ]);
}

这是一个视图（javascript部分）：

var data = {!! $categories !!};

$('#tree').tree({
        data: data,
        dragAndDrop: true,
        onDragStop: handleMove,
});

function handleMove() {
    var treeData = $('#tree').tree('toJson');

$.ajax({
    url: 'category',
    type: 'POST',
    headers: { 'X-CSRF-TOKEN': $('meta[name="csrf-token"]').attr('content') },
    data: { data: treeData },
});


}

这样可以正确构建树，我可以拖动＆amp;丢弃物品。但是，我想将重新排序的树保存回数据库。这是控制器中的post方法：
```
Type error: Argument 1 passed to Kalnoy\\Nestedset\\QueryBuilder::rebuildTree() must be of the type array, string given
```

调用rebuildTree方法后，我收到此错误：

public function store(Request $request)
{
  $data = $request->data;
  $result = Category::rebuildTree($data);
  ...
}

我试过这个：

public function store(Request $request)
{
  $data = $request->data;
  $data = json_decode($request->data);
  $array_data = (array) $data;
  $result = Category::rebuildTree($data);
  ...
}

然后返回：

不能使用stdClass类型的对象作为数组

如何获取传递的数据数组，以便我可以使用rebuildTree()方法并更新数据库？

以下是dd($request->data):

[{"name":"Storage","id":3,"_lft":17,"_rgt":18,"parent_id":null,"is_open":true,
    "children":[{"name":"Laptops","id":1,"_lft":1,"_rgt":10,"parent_id":null,"is_open":true,
    "children":[{"name":"Monitors","id":2,"_lft":11,"_rgt":16,"parent_id":null,
    "children":[{"name":"IPS","id":5,"_lft":14,"_rgt":15,"parent_id":2}]},
    {"name":"Macbook","id":6,"_lft":2,"_rgt":3,"parent_id":1},
    {"name":"Acer","id":7,"_lft":4,"_rgt":5,"parent_id":1},
    {"name":"New Subcategory Name","id":8,"_lft":6,"_rgt":7,"parent_id":1},
    {"name":"New Subcategory ame","id":9,"_lft":8,"_rgt":9,"parent_id":1}]}]},
    {"name":"Memory","id":4,"_lft":19,"_rgt":20,"parent_id":null}]

另外，要明确：我正在使用jqTree

嵌套集合为lazychaser/laravel-nestedset

Answer 1

json您需要$request->data;使用json_decode()将其解析为数组，并将第二个参数解析为true

see the manual

ASSOC

如果为TRUE，则返回的对象将转换为关联对象   阵列。

public function store(Request $request)
{
  $result = Category::rebuildTree(json_decode($request->data,True));
  ...
}

如果你需要在$data中传递它，那么就这样传递它。

$data = json_decode($request->data,True);

<强>替代地

foreach ($request->data as $value) 
    $array[] = $value->name;

然后将此$array传递到您的查询中，就像这样

$result = Category::rebuildTree($array);

嵌套集保存到数据库

1 个答案: