PHP code example of paulzi / yii2-adjacency-list

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

    

paulzi / yii2-adjacency-list example snippets

class m150722_150000_adjacency_list extends Migration
{
    public function up()
    {
        $tableOptions = null;
        if ($this->db->driverName === 'mysql') {
            // http://stackoverflow.com/questions/766809/whats-the-difference-between-utf8-general-ci-and-utf8-unicode-ci
            $tableOptions = 'CHARACTER SET utf8 COLLATE utf8_unicode_ci ENGINE=InnoDB';
        }
        $this->createTable('{{%adjacency_list}}', [
            'id'        => Schema::TYPE_PK,
            'parent_id' => Schema::TYPE_INTEGER . ' NULL',
            'sort'      => Schema::TYPE_INTEGER . ' NOT NULL',
            'name'      => Schema::TYPE_STRING . ' NOT NULL', // example field
        ], $tableOptions);
        $this->createIndex('parent_sort', '{{%adjacency_list}}', ['parent_id', 'sort']);
    }
}

use paulzi\adjacencyList\AdjacencyListBehavior;

class Sample extends \yii\db\ActiveRecord
{
    public function behaviors() {
        return [
            [
                'class' => AdjacencyListBehavior::className(),
            ],
        ];
    }
}

class Sample extends \yii\db\ActiveRecord
{
    public static function find()
    {
        return new SampleQuery(get_called_class());
    }
}

use paulzi\adjacencyList\AdjacencyListQueryTrait;

class SampleQuery extends \yii\db\ActiveQuery
{
    use AdjacencyListQueryTrait;
}

$roots = Sample::find()->roots()->all();

$node11 = Sample::findOne(['name' => 'node 1.1']);
$parents = $node11->parents; // via relation unsorted
$parents = $node11->parentsOrdered; // via relation sorted
$parents = $node11->getParents()->all(); // via query
$parents = $node11->getParents(2)->all(); // get 2 levels of ancestors

$node11 = Sample::findOne(['name' => 'node 1.1']);
$parent = $node11->parent; // via relation
$parent = $node11->getParent()->one(); // via query

$node11 = Sample::findOne(['name' => 'node 1.1']);
$root = $node11->root; // via relation
$root = $node11->getRoot()->one(); // via query

$node11 = Sample::findOne(['name' => 'node 1.1']);
$ids = $node11->getParentsIds();
$ids = $node11->getParentsIds(3, false); // get 3 levels of ancestors primary keys with force updating from DB 

$node11 = Sample::findOne(['name' => 'node 1.1']);
$descendants = $node11->descendants; // via relation unsorted
$descendants = $node11->descendantsOrdered; // via relation sorted
$descendants = $node11->getDescendants()->all(); // via query
$descendants = $node11->getDescendants(2, true)->all(); // get 2 levels of descendants and self node

$node11 = Sample::findOne(['name' => 'node 1.1']);
$tree = $node11->populateTree(); // populate all levels
$tree = $node11->populateTree(2); // populate 2 levels of descendants

$node11 = Sample::findOne(['name' => 'node 1.1']);
$children = $node11->children; // via relation
$children = $node11->getChildren()->all(); // via query

$node11 = Sample::findOne(['name' => 'node 1.1']);
$ids = $node11->getDescendantsIds(); // get array of per-level descendants primary keys
$ids = $node11->getDescendantsIds(null, true); // get flat array of descendants primary keys
$ids = $node11->getDescendantsIds(3, false, false); // get 3 levels array of per-level descendants primary keys with force updating from DB 

$node11 = Sample::findOne(['name' => 'node 1.1']);
$leaves = $node11->leaves; // via relation
$leaves = $node11->getLeaves(2)->all(); // get 2 levels of leaves via query

$node11 = Sample::findOne(['name' => 'node 1.1']);
$next = $node11->next; // via relation
$next = $node11->getNext()->one(); // via query

$node11 = Sample::findOne(['name' => 'node 1.1']);
$prev = $node11->prev; // via relation
$prev = $node11->getPrev()->one(); // via query

$node1 = Sample::findOne(['name' => 'node 1']);
$node11 = Sample::findOne(['name' => 'node 1.1']);
$node11->isRoot() - return true, if node is root
$node11->isLeaf() - return true, if node is leaf
$node11->isChildOf($node1) - return true, if node11 is child of $node1

$node11 = new Sample();
$node11->name = 'node 1.1';
$node11->makeRoot()->save();

$node1 = Sample::findOne(['name' => 'node 1']);
$node11 = new Sample();
$node11->name = 'node 1.1';
$node11->prependTo($node1)->save(); // inserting new node

$node11 = Sample::findOne(['name' => 'node 1.1']);
$node12 = Sample::findOne(['name' => 'node 1.2']);
$node12->appendTo($node11)->save(); // move existing node

$node13 = Sample::findOne(['name' => 'node 1.3']);
$node12 = new Sample();
$node12->name = 'node 1.2';
$node12->insertBefore($node13)->save(); // inserting new node

$node13 = Sample::findOne(['name' => 'node 1.3']);
$node14 = Sample::findOne(['name' => 'node 1.4']);
$node14->insertAfter($node13)->save(); // move existing node

$node11 = Sample::findOne(['name' => 'node 1.1']);
$node11->delete(); // delete node, children come up to the parent
$node11->deleteWithChildren(); // delete node and all descendants 

$model = Sample::findOne(1);
$model->reorderChildren(true); // reorder with center zero
$model = Sample::findOne(2);
$model->reorderChildren(false); // reorder from zero