magento app开发遇到的问题及解决

今天一直在解决Magento的APP接口调用数据异常的问题，调用/api/rest/category/:id 这个接口的时候,返回的所有目录的数据是一样的，原始代码是这样的.

1）请求地址 /api/rest/category/3

2) 请求地址请求的是对应的类的_retrieve这个方法

  protected function _retrieve()
  {
       $category_id = $this->getRequest()->getParam('id');
       $categorys = array();
       $nodes =Mage::getModel('catalog/category')->getCategories($category_id);
       $nodes_count = count($nodes);
       foreach($nodes as $node)
       {
           $category = Mage::getModel('catalog/category')->load($node->getId());
           $data = $this->_renderData($category,$category_id,$nodes_count);
           if($data) $categorys[] = $data;
       }
         return $categorys;
     }

3)_retrieve这个方法调用的_renderData这个方法（没修改之前）

protected function _renderData($category, $category_id,$nodes_count)
{
        $item = array();
        $item['id'] = $category->getId();
        $item['name'] = $category->getName();

        //skip brands
        if($category->getUrlKey()=='brands') return @$data;

        $item['url_key'] = $category->getUrlKey();
        $item['thumbnail'] = $this->getThumbnailUrl($category);
        $item['child'] = array();
        $category_id = $this->getRequest()->getParam('id');
        $category = Mage::getModel('catalog/category')->load($category_id);
        $ids = $category->getChildren();
        $id_array = explode(',', $ids);
        $product_array = array();
        foreach ($id_array as $key => $value) {
            $products = Mage::getModel('catalog/category')->load($value)
                    ->getProductCollection()
                    ->addAttributeToSelect('*')
                    ->addAttributeToFilter('status', 1)
                    ->addAttributeToFilter('visibility', 4);

                $product_data =array();
                foreach ($products as $product ) {
                    $image = $product->getImage();
                    $image_url = $this->getProductImageUrl($image);
                    $product_data[]= array(
                        'name'=>$product->getName(),
                        'sku' =>$product->getSku(),
                        'image'=>$image_url,
                        'price'=>$product->getPrice(),
                        'weight'=>$product->getWeight(),
                        'short_description'=>$product->getShort_description()
                        );
                }
                  $product_array[] = $product_data;
       }
                  $item['child']= $product_array;

                  retrun $item;
}
    

运行了这些代码后，所有子目录下面都是一样的产品!!! 其实问题很简单，不用foreach两层嵌套这么麻烦,其实每次在_retrieve这个方法执行的时候其实就是给单独的产品追加属于自己的产品就可以了，如果像第三步一样，就相当于给所有目录就加上了一样的产品,_renderData改成下面的代码即可

4)正确代码

 protected function _renderData($category, $category_id,$nodes_count)
 {
        $item = array();
        $item['id'] = $category->getId();
        $item['name'] = $category->getName();

        //skip brands
        if($category->getUrlKey()=='brands') return @$data;

        $item['url_key'] = $category->getUrlKey();
        $item['thumbnail'] = $this->getThumbnailUrl($category);
        $item['child'] = array();

        $products = Mage::getModel('catalog/category')->load($item['id'] )
                  ->getProductCollection()
                  ->addAttributeToSelect('*')
                  ->addAttributeToFilter('status', 1)
                  ->addAttributeToFilter('visibility', 4);

          $product_data =array();
          foreach ($products as $product ) {
              $image = $product->getImage();
              $image_url = $this->getProductImageUrl($image);
              $product_data[]= array(
                  'name'=>$product->getName(),
                  'sku' =>$product->getSku(),
                  'image'=>$image_url,
                  'price'=>$product->getPrice(),
                  'weight'=>$product->getWeight(),
                  'short_description'=>$product->getShort_description()
                  );
          }
            $item['child'] = $product_data;
      return $item;
 }

改成上面的代码后，就正常了，工作中一定要弄懂基础的原理，问题有时候就迎刃