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[英]WooCommerce - Display sub-category from specific category parent in order email
[英]Laravel display all parent categories as tree for a specific sub-category
我正在尝试获取子类别的类别树
假设我有一个名为配件的子类别
这个子类别有电子产品 > 笔记本电脑的父母
所以它是电子 > 笔记本电脑 > 配件
表:
-----------------------------------------
| id | parent_id | name |
|---- |----------- |------------- |
| 1 | 0 | Electronics |
| 2 | 1 | Laptops |
| 3 | 2 | Accessories |
-----------------------------------------
我可以获得子类别的根类别,例如:
function getTopParent($category) {
if($category->parent_id === null) {
return $category->name;
}
return getTopParent(App\Category::find($category->parent_id));
// Will return Electronics
}
我也知道如何显示树之类的类别, 请参见此处
function printCategoryName($categories, $parentName = '') {
foreach ($categories as $category) {
$name = $parentName ? implode(' > ', [$parentName, $category->name]) : $category->name;
echo sprintf('%s%s', $name, PHP_EOL);
if (count($category->children) > 0) {
printCategoryName($category->children, $name);
}
}
}
printCategoryName($categories);
我需要的是提供一个像配件这样的类别,并为这个子类别获取树和类别树:
电子产品 > 笔记本电脑 > 配件。
我怎样才能做到这一点?
这就是我让它工作的方式:
function getParentsTree($category, $name)
{
if ($category->parent_id == null)
{
return $name;
}
$parent = Category::find($category->parent_id);
$name = $parent->name . ' > ' . $name;
return getParentsTree($parent, $name);
}
$cat = Category::find(1);
echo getParentsTree($cat, $cat->name);
输出: Electronics > Laptops > Accessories
您应该阅读嵌套集模型
我正在使用这种结构
您输入的类别模型App\\Category.php
class Categories extends Model
{
public function parent()
{
return $this->hasOne('App\Category', 'parent_id','id');
}
public function childiren()
{
return $this->hasMany('App\Category', 'id','parent_id');
}
}
你的控制器ExampleController.php
public function example()
{
$data = Category::all();
return view('index', compact('data'));
}
你的刀片index.blade.php
<select>
@foreach($data as $categories)
<optgroup label="{{ $categories->name }}">
@foreach($categories->children as $category)
<option value="{{ $category->id }}">{{ $category->name }}</option>
@endforeach
</optgroup>
@endforeach
</select>
你也使用jquery select 2
protected function getCategoriesTree()
{
$categories = Category::where('parent_id',0)->get();
if($categories->count())
{
foreach ($categories as $category)
{
$categories_tree[$category->id] = $this->getChildCategories($category);
}
}
return response()->json(['categories' => $categories_tree]);
}
private function getChildCategories($category)
{
$sub_categories = [];
$childs = Category::where('parent_id', $category->id)->get();
$sub_categories = $category;
$sub_categories['sub_categories'] = [];
if($childs->count())
{
$sub_categories['sub_categories'] = $childs;
}
return $sub_categories;
}
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