Laravel - Sub-categories display under Main categories

前端未结

关注

 2  1316

我寻月下人不归 2021-01-15 04:52

Hi there
I have one problem with categories and sub-categories
I have table like:

ID----- Name---- ParentID
1 ------- A ---------

2条回答

粉色の甜心 (楼主)

2021-01-15 05:40

Display Sub, Sub & Sub Category -

Model

Migration the following Category Table:

Schema::create('categories', function (Blueprint $table) {
    $table->increments('id');
    $table->string('name');
    $table->tinyInteger('parent_id')->default(0);
    $table->timestamps();
});

Input Your Category and Sub-Category Like following Table Structure:

+-------------+----------------------+----------+
| id          | name                 |parent_id |
+-------------+----------------------+----------+
|           1 | ELECTRONICS          |      0   |
|           2 | TELEVISIONS          |      1   |
|           3 | TUBE                 |      2   |
|           4 | LCD                  |      2   |
|           5 | PLASMA               |      2   |
|           6 | PORTABLE ELECTRONICS |      1   |
|           7 | MP3 PLAYERS          |      6   |
|           8 | FLASH                |      7   |
|           9 | CD PLAYERS           |      6   |
|          10 | 2 WAY RADIOS         |      6   |
+-------------+----------------------+----------+

Controller

MySQL hierarchical recursive query

$categories = DB::table('categories as c1')
    ->leftJoin('categories as c2','c2.parent_id','=','c1.id')
    ->leftJoin('categories as c3','c3.parent_id','=','c2.id')
    ->leftJoin('categories as c4','c4.parent_id','=','c3.id')
    ->select('c1.id as c1_id','c1.name as c1_name','c2.id as c2_id','c2.name as c2_name','c3.id as c3_id','c3.name as c3_name','c4.id  as c4_id','c4.name as c4_name')
    ->where('c1.parent_id','=',0)
    ->get();

Output:

+-----------------+--------------------------+------------------+-----------------+
|c1_id| c1_name   | c2_id| c2_name           | c3_id| c3_name   | c4_id| c4_name  |
+-----------------+--------------------------+------------------+-----------------+
| 1 | ELECTRONICS | 2 | TELEVISIONS          | 3 | TUBE         | NULL  |
| 1 | ELECTRONICS | 2 | TELEVISIONS          | 4 | LCD          | NULL  |
| 1 | ELECTRONICS | 2 | TELEVISIONS          | 5 | PLASMA       | NULL  |
| 1 | ELECTRONICS | 6 | PORTABLE ELECTRONICS | 7 | MP3 PLAYERS  | 8   | FLASH |
| 1 | ELECTRONICS | 6 | PORTABLE ELECTRONICS | 9 | CD PLAYERS   | NULL  |
| 1 | ELECTRONICS | 6 | PORTABLE ELECTRONICS | 10| 2 WAY RADIOS | NULL  |
+-------------+--------------------------------------+--------------+-------+

Then, Put $categories values in an Array.

$all_categories = [];
$category_c1_id = '';
$category_c2_id = '';
$category_c3_id = '';
$category_c4_id = '';
$c1_id = -1;
$c2_id = -1;
$c3_id = -1;
$c4_id = -1;
foreach ($categories as $k=>$category){
    if($category->c1_id != $category_c1_id){
        $c1_id = $c1_id +1;
        $all_categories[$c1_id]['id'] = $category->c1_id;
        $all_categories[$c1_id]['name'] = $category->c1_name;
        $c2_id = -1;
    }
    if($category->c2_id != $category_c2_id && $category->c2_id <> NULL){
        $c2_id = $c2_id +1;
        $all_categories[$c1_id]['children'][$c2_id]['id'] = $category->c2_id;
        $all_categories[$c1_id]['children'][$c2_id]['name'] = $category->c2_name;
        $c3_id = -1;
    }
    if($category->c3_id != $category_c3_id && $category->c3_id <> NULL){
        $c3_id = $c3_id +1;
        $all_categories[$c1_id]['children'][$c2_id]['children'][$c3_id]['id'] = $category->c3_id;
        $all_categories[$c1_id]['children'][$c2_id]['children'][$c3_id]['name'] = $category->c3_name;
        $c4_id = -1;
    }
    if($category->c4_id != $category_c4_id && $category->c3_id <> NULL){
        $c4_id = $c4_id +1;
        $all_categories[$c1_id]['children'][$c2_id]['children'][$c3_id]['children'][$c4_id]['id'] = $category->c4_id;
        $all_categories[$c1_id]['children'][$c2_id]['children'][$c3_id]['children'][$c4_id]['name'] = $category->c4_name;
    }
    $category_c1_id = $category->c1_id;
    $category_c2_id = $category->c2_id;
    $category_c3_id = $category->c3_id;
    $category_c4_id = $category->c4_id;
}
return $all_categories;

Output:

$categories = [
  ['id' => 1, 'name' => 'TV & Home Theather'],
  ['id' => 2, 'name' => 'Tablets & E-Readers'],
  ['id' => 3, 'name' => 'Computers', 'children' => [
    ['id' => 4, 'name' => 'Laptops', 'children' => [
      ['id' => 5, 'name' => 'PC Laptops'],
      ['id' => 6, 'name' => 'Macbooks (Air/Pro)']
    ]],
    ['id' => 7, 'name' => 'Desktops'],
    ['id' => 8, 'name' => 'Monitors']
  ]],
  ['id' => 9, 'name' => 'Cell Phones']
];

View

Now Display on Select option on Product upload.


    Select Categories

    @foreach($categories as $category)
        @php($category = (object)$category)
        
            
                {{ Form::checkbox('category_ids[]', $category->id, null, array('id'=>$category->id)) }}
                {{$category->name}}
            
            @if(isset($category->children))
                @foreach($category->children as $subcategory)
                    @php($subcategory = (object)$subcategory)
                    
                        
                            {{ Form::checkbox('category_ids[]', $subcategory->id, null, array('id'=>$subcategory->id)) }}
                            {{$subcategory->name}}
                        
                        @if(isset($subcategory->children))
                            @foreach($subcategory->children as $subsubcategory)
                                @php($subsubcategory = (object)$subsubcategory)
                                
                                    
                                        {{ Form::checkbox('category_ids[]', $subsubcategory->id, null, array('id'=>$subsubcategory->id)) }}
                                        {{$subsubcategory->name}}
                                    
                                
                            @endforeach
                        @endif
                    
                @endforeach
            @endif
        
    @endforeach

And ON Menu Option


  @foreach($categories as $category)
      
          {{$category['name']}}
          
              
                  @if(isset($category['children']))
                      
                          @foreach($category['children'] as $subcategory)
                              
                                  
                                      {{$subcategory['name']}}
                                      @if(isset($subcategory['children']))
                                          
                                              @foreach($subcategory['children'] as $subcategory)
                                                  {{$subcategory['name']}}
                                              @endforeach
                                          
                                      @endif

                                  
                              
                          @endforeach
                      
                  @endif
              
          
      
  @endforeach

0 讨论(0)

查看其它2个回答