从子类别中获取所有父母

Question

I have a table

id; name; parent_id
1   xxx   0

2   ccc   0

3   zzz   1

4   yyy   3

My goal is to get the category and get all the parents exemple:

Category with id 4

1.xxx

 3.zzz

   4.yyy

What i have done until now my model Categories

class Categories extends Model

{
    protected $table = 'categories';

    public function parent() {
       return $this->hasMany('App\Models\Categories','id');   
    }

    public function children(){
       return $this->hasMany('App\Models\Categories','parent_id');   
    }

}

My controler that gets the category i want:

   $data['cat']= Categories::with('parent')->get();

my blade

@foreach ($cat as $c)
   {{ $c->name }}
 @endforeach

I am a bit confused how to do this i have try for 2 days find tutorials and read other examples but i can't understand i am a bit noob i am sorry.

Thanks for the help

Answer 1

Relations:

public function parent()
{
    return $this->belongsTo(Category::class, 'parent_id');
}

public function children()
{
    return $this->hasMany(Category::class, 'parent_id');
}

Starting with parent categories:

$parentCategories = Category::where('parent_id', '=', 0)->with('children')->get();

In view:

@if($parentCategories)
<div class="categories">
    @foreach($parentCategories as $parent)
        ...
        @if($parent->children())
            ...
            @foreach($parent->children as $child)
                ...
                @if($child->children())
                    ...
                        @foreach($child->children as $c)
                            ...
                        @endforeach
                    ...
                @endif
                ...
            @endforeach
            ...
        @endif
        ...
    @endforeach
</div>
@endif

Starting with child categories:

$childCategories => Category::where('parent_id', '!=', 0)->with('parent')->get();

In view:

@if($childCategories)
<div class="categories">
    @foreach($childCategories as $child)
        <div>{{ $child->name }}</div>

        @if($child->parent)
            <div style="padding-left: 5px;">{{ $child->parent->name }}</div>

            @if($child->parent->parent)
                <div style="padding-left: 10px;">{{ $child->parent->parent->name }}</div>
            @endif
        @endif
    @endforeach
</div>
@endif