Question

我正在Laravel 5.2中构建一个基本的CMS。

我有一个＆＃39;页面＆＃39;模型。这个型号有很多＆＃39;作为页面的自身关系可以有很多子页面，子页面可以有很多子子页面等。

我的模型定义如下：

class Page extends Model
{
    public function children()
    {
        return $this->hasMany('App\Page', 'page_parent');
    }
}

我的数据库是这样的

+----+-----------------+------------------------+------------+-------------+
| id | title           | description            | project_id | page_parent |
+----+-----------------+------------------------+------------+-------------+
|  1 | Overview        | The overview page      |          1 |           0 |
|  2 | Overview sub    | Child page             |          1 |           1 |
|  3 | Very young page | This is the kiddy page |          1 |           2 |
+----+-----------------+------------------------+------------+-------------+

然后在我的控制器中我有：

public function index()
{
    $pages = Page::with('children')->get();
    return Response()->json($pages, 200);
}

这是做什么的： 这将按预期返回页面，但是，页面只有一个级别，其中一个级别在“孩子们”中。像这样的对象：

[
   {
      "id":1,
      "title":"Overview",
      "description":"The overview page",
      "project_id":"1",
      "page_parent":"0",
      "children":[
         {
            "id":2,
            "title":"Overview sub",
            "description":"Child page",
            "project_id":"1",
            "page_parent":"1",
         }
      ]
   },
   {
      "id":2,
      "title":"Overview sub",
      "description":"Child page",
      "project_id":"1",
      "page_parent":"1",
      "children":[
         {
            "id":3,
            "title":"Very young page",
            "description":"This is the kiddy page",
            "project_id":"1",
            "page_parent":"2"
         }
      ]
   },
   {
      "id":3,
      "title":"Very young page",
      "description":"This is the kiddy page",
      "project_id":"1",
      "page_parent":"2",
      "children":[

      ]
   }
   ]

我想要什么 对我的前端dev来说更好的是只有一个根JSON对象（顶级页面），然后是＆＃39; children＆＃39;对象递归到自身以构建页面的多级树，如下所示：

[
{
      "id":1,
      "title":"Overview",
      "description":"The overview page",
      "project_id":"1",
      "page_parent":"0",
      "children":[
         {
            "id":2,
            "title":"Overview sub",
            "description":"Child page",
            "project_id":"1",
            "page_parent":"1",
            "children":[
            {
                 [
                 "id":3,
                 "title":"Very young page",
                 "description":"This is the kiddy page",
                 "project_id":"1",
                 "page_parent":"2",
                 "children":[

                 ]
                 ]
            }
            ]
         }
      ]
   },
]

我可以想到一些hacky方式，但想知道什么是最好的Laravel方式＆＃39;。我应该使用访问器还是类似的东西？

由于

Answer 1

你可以这样做：

$pages = Page::with('children')->get()->toJson();

这也有效：

$pages = Page::with('children')->get()->groupBy('page_parent')->toJson();

从具有多个关系的

1 个答案: