nested set save to database

I'm trying to implement jqTree with Laravel app.

Controller gets data and return view:

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

Here is a view (javascript part):

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 },
});


}

This builds tree properly and I can drag & drop items. However, I want to save reordered tree back to database. Here is a post method in a controller:
```
public function store(Request $request)
{
  $data = $request->data;
  $result = Category::rebuildTree($data);
  ...
}
```

After calling rebuildTree method, I'm getting this error:

Type error: Argument 1 passed to Kalnoy\\Nestedset\\QueryBuilder::rebuildTree() must be of the type array, string given

I have tried with this:

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

This however returns:

Cannot use object of type stdClass as array

How can I get array of data passed so I can use rebuildTree() method and update database?

Here is a result of 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}]

Also, just to be clear: I'm using jqTree

Nested set is lazychaser/laravel-nestedset

Solution

You are getting json in $request->data; you need to decode it in array using json_decode() along with second parameter as true for assoc

see the manual

assoc

When TRUE, returned objects will be converted into associative arrays.

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

and if you need to pass it in $data then pass it like this.

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

Alternatively

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

then pass this $array into your query like this

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