Laravel 获取类别和子类别

Question

Table结构

--------------------------
|id     name    parent_id
--------------------------
|1      Memory  NULL
|2      RAM     1

我的模型的特征和子特征如下

class Feature extends Model
{
    public $fillable = ['name','parent_id'];


    public function parent()
    {
        return $this->belongsTo('App\Feature','parent_id');
    }

    public function child()
    {
        return $this->hasMany('App\Feature','parent_id');
    }
}

现在我想获取父特征和子特征，

Answer 1

试试这个：

$f = Feature::with('child', 'parent')->get()

现在你可以像这样拥有它们了：

$f->name;
$f->parent->name;
$f->child->name;

Answer 2

$features = Feature::whereNull('parent_id')->with('child')->get();

然后

foreach ($features as $feature)
{
    $feature->name; // Parent
    $feature->child->name; // Child
}

Laravel 获取类别和子类别

Laravel fetch category and sub-category

php

laravel

laravel-eloquent