Yii nested set to dropdown menu

问题

I'm using Yii nested set behavior, which helps me to keep my categories nested as seen here (nevermind title rows, they are in russian):

And all I want to do is to have Bootstrap nested menu, which should be like this:

    $criteria = new CDbCriteria;
    $criteria->order = 'root, lft';
    $categories = Category::model()->findAll($criteria);
    foreach($categories as $i => $category) {
      $items[$i]['label'] = $category->title;
      $items[$i]['url'] = $category->url;
      $items[$i]['active'] = false;
      $items[$i]['items'] = array(
        array('label'=>'123', 'url'=>'#'),
        array('label'=>'123', 'url'=>'#'),
        array('label'=>'123', 'url'=>'#', 'items'=>array(
            array('label'=>'1234', 'url'=>'#'),
            array('label'=>'1234', 'url'=>'#'),
            array('label'=>'1234', 'url'=>'#', 'items'=>array(
                array('label'=>'1234', 'url'=>'#'),
                array('label'=>'1234', 'url'=>'#'),
                array('label'=>'1234', 'url'=>'#'),
            )),
        )),
    ); 
}
$this->widget('bootstrap.widgets.TbMenu', array(
    'type'=>'pills',
    'stacked'=>false, // whether this is a stacked menu
    'items'=>$items
)); 

I don't understand how to get this done, btw I read this topic and just don't know how actually apply this function to my problem. Appreciate any help.

回答1:

This is the function that I use to format as json object, you can modify it to generate a php array.

protected function formatJstree(){
        $categories = $this->descendants()->findAll();
        $level=0;
        $parent = 0;
        $data = array();
        foreach( $categories as $n => $category )
        {
            $node = array(
                'data'=> "{$category->title}",
                'attr'=>array('id'=>"category_id_{$category->category_id}")
            );
            if($category->level == $level){
                $data[$parent]["children"][] = $node;
            }
            else if($level != 0 && $category->level > $level){
                if(!isset($data[$n]["children"])){
                    $data[$n]["children"] = array();
                }
                $data[$parent]["children"][] = $node;
            }
            else
            {
                $data[] = $node;
                $parent = $n;
            }
            $level=$category->level;

        }
        return $data;

    }

回答2:

Finally, my own recursive solution (works with multiple roots):

    public function getTreeRecursive() {
    $criteria = new CDbCriteria;
    $criteria->order = 'root, lft';
    $criteria->condition = 'level = 1';
    $categories = Category::model()->findAll($criteria);

    foreach($categories as $n => $category) {
        $category_r = array(
            'label'=>$category->title,
            'url'=>'#',
            'level'=>$category->level,
        );              
        $this->category_tree[$n] = $category_r;

        $children = $category->children()->findAll();
        if($children)
            $this->category_tree[$n]['items'] = $this->getChildren($children);
    }
    return $this->category_tree;
}
private function getChildren($children) {
    $result = array();
    foreach($children as $i => $child) {
        $category_r = array(
            'label'=>$child->title,
            'url'=>'#',
        );          
        $result[$i] = $category_r;
        $new_children = $child->children()->findAll();
        if($new_children) {
            $result[$i]['items'] = $this->getChildren($new_children);
        }           
    }
    return $result_items = $result;
}

回答3:

Creating multi-level category system with PHP & Yii (MVC Framework) in not just a simple undertaking. 1. Create Function in models

`

function getRootCategory($cur_cat='') {
$sql='select id, course_name, parent_id from course where parent_id="0" and status=0'; 
$command=Yii::app()->db->createCommand($sql);
$return =$command->queryAll();
foreach($return as $rootCat){
if ($rootCat['id']==$cur_cat){
$test= 'selected=selected'; 
}else{
$test='';
 }
$id=$rootCat['id'];
echo "".$rootCat['course_name'].'';
$this->sub_cat($rootCat['id'] , '', $cur_cat ); 
}
 }

   function sub_cat($parentID=0, $space='',$cur_cat ) {
$sql="select id, course_name, parent_id from course where parent_id='$parentID' and status=0";
$command=Yii::app()->db->createCommand($sql);
$return =$command->queryAll();
$count=count($return);
if($parentID==0){ $space=''; }else{ $space .=" - "; }

if($count > 0){
foreach($return as $subcat){
if ($subcat['id']==$cur_cat){$test='selected=selected';}else{$test='';}
$ids=$subcat['id'];
echo "".$space.$subcat['course_name'].'';
$this->sub_cat($subcat['id'],$space, $cur_cat ); 
}
 } 
}

` Now create this code in view/file.php

<?php
echo ‘<select id=”parent_id” class=”select” name=”Course[parent_id]” >’;
echo “<option value=’0′  >–Select Exam–</option>”;
echo Course::model()->getRootCategory($model->parent_id);
// ($model->parent_id) means selected text box
echo ‘</select>’; ?>

More Details click on this url Visit http://it-expert.in/create-multi-level-category-using-recursive-function-in-yii/

来源：https://stackoverflow.com/questions/13113727/yii-nested-set-to-dropdown-menu