I need to build a dropdown list from data with a parent/child relationship, with unlimited levels, such as:
id | parent_id | name
1 0 foo
2 0 bar
3 1 cat
4 1 dog
5 2 fish
6 3 cow
7 5 goat
8 6 donkey
…and so on.
So, before I go building something myself for this, since I’m sure working with data like this is common, I wanted to check if Yii any helper functions that could output a nested dropdown list with this data for you and you can just pass it an array or something with the required data?
Ok, I had a look, but that appears to be more of a frontend select plugin? I already am using select2 and I can display the data correctly, but I was just checking to see if Yii had a helper function to take the data and sort them into their correct parent/child relationships so I could then feed that data to the select list.
we can make folle me
in Form or gridview use want to use it
<?php
namespace backend\models;
use Yii;
use yii\base\Model;
use yii\data\ActiveDataProvider;
use backend\models\Categories;
/**
* CategoriesSeach represents the model behind the search form about `backend\models\Categories`
*/
class CategoriesSearch extends Categories
{
public function dequymenu(){
$query = Categories::find()->select('id,parent_id,name, display_order')->where(['status'=>0]);
$dataProvider = new ActiveDataProvider([
'query' => $query,
'sort' => [
'defaultOrder' => [
'display_order' => SORT_ASC,
]
],
'pagination' => false
]);
return $dataProvider->getModels();
}
}
// END FUNCTION in categoriessearch
// THIS IS CODE IN _FORM.php
<?php
use backend\models\CategoriesSearch;
function showMenuTree($categories, $parent_id = 0, $char = '', &$array){
foreach ($categories as $key => $item){
if ($item['parent_id'] == $parent_id){
$array[$item['id']] = $char. $item['name'];
unset($categories[$key]);
static::showMenuTree($categories, $item['id'], $char.'---', $array);
}
}
return $array;
}
$arrcate=CategoriesSearch::dequymenu();
$arrMenu=array();
showMenuTree($arrcate,0,'', $arrMenu);
?>
<?php $form = ActiveForm::begin(['options' => ['enctype' => 'multipart/form-data']]) ?>
<?= $form->field($model, 'id')->dropdownList($arrMenu, ['class'=>'select2 css-select','data-select-width'=>250,'prompt' => 'SELECE MENU']) ?>
<?php ActiveForm::end(); ?>
if You do not understand, you can email: hongduyphp@gmail.com or skype: duyminh123.
