Php magento中的concate sql查询

我是马根托的新手。我正在编写一个代码，如：

   $products = Mage::getModel('catalog/product')->getCollection()
                ->addAttributeToSelect('*')
                ->addAttributeToSort("entity_id", "DESC")
                ->addAttributeToSelect(array('name', 'price', 'small_image'))
                ->setVisibility ( Mage::getSingleton( 'catalog/product_visibility')->getVisibleInSiteIds())
                ->setOrder($this->get_order(), $this->get_order_dir());

if($size != ''){
    $products->getSelect()
    ->joinLeft(array('cat_product' => 'catalog_category_product'), 'cat_product.product_id=e.entity_id')
    ->joinLeft(array("at_int" => 'catalog_product_entity_int'), 'cat_product.product_id=at_int.entity_id')
    ->joinLeft(array('cpf'=>'catalog_product_flat_1'),'cpf.entity_id=e.entity_id',array('shhirt_size'))
    ->where('at_int.value=30 AND cpf.shhirt_size='.$size.' AND at_int.attribute_id=(SELECT `attribute_id` FROM `eav_attribute` WHERE `attribute_code`="product_attrb_type_name") ')
    ;
}else if($size == ''){
    $products->getSelect()
    ->joinLeft(array('cat_product' => 'catalog_category_product'), 'cat_product.product_id=e.entity_id')
    ->joinLeft(array("at_int" => 'catalog_product_entity_int'), 'cat_product.product_id=at_int.entity_id')
    ->where('at_int.value=30 AND at_int.attribute_id=(SELECT `attribute_id` FROM `eav_attribute` WHERE `attribute_code`="product_attrb_type_name") ' )
    ;
}

在使用condition时，通过使用$products的值，我编写了如下代码：

   $products = Mage::getModel('catalog/product')->getCollection()
                ->addAttributeToSelect('*')
                ->addAttributeToSort("entity_id", "DESC")
                ->addAttributeToSelect(array('name', 'price', 'small_image'))
                ->setVisibility ( Mage::getSingleton( 'catalog/product_visibility')->getVisibleInSiteIds())
                ->setOrder($this->get_order(), $this->get_order_dir());

if($size != ''){
    $products->getSelect()
    ->joinLeft(array('cat_product' => 'catalog_category_product'), 'cat_product.product_id=e.entity_id')
    ->joinLeft(array("at_int" => 'catalog_product_entity_int'), 'cat_product.product_id=at_int.entity_id')
    ->joinLeft(array('cpf'=>'catalog_product_flat_1'),'cpf.entity_id=e.entity_id',array('shhirt_size'))
    ->where('at_int.value=30 AND cpf.shhirt_size='.$size.' AND at_int.attribute_id=(SELECT `attribute_id` FROM `eav_attribute` WHERE `attribute_code`="product_attrb_type_name") ')
    ;
}else if($size == ''){
    $products->getSelect()
    ->joinLeft(array('cat_product' => 'catalog_category_product'), 'cat_product.product_id=e.entity_id')
    ->joinLeft(array("at_int" => 'catalog_product_entity_int'), 'cat_product.product_id=at_int.entity_id')
    ->where('at_int.value=30 AND at_int.attribute_id=(SELECT `attribute_id` FROM `eav_attribute` WHERE `attribute_code`="product_attrb_type_name") ' )
    ;
}

它工作得很好。但这里的代码是重新编写的。如何以这种方式编写上述代码，只有where子句将位于if部分和else部分

请帮帮我。 提前谢谢。

喜欢吗

# the same part
$q = $products->getSelect()
    ->joinLeft(array('cat_product' => 'catalog_category_product'), 'cat_product.product_id=e.entity_id')
    ->joinLeft(array("at_int" => 'catalog_product_entity_int'), 'cat_product.product_id=at_int.entity_id');
if($size != ''){    
    $q->joinLeft(array('cpf'=>'catalog_product_flat_1'),'cpf.entity_id=e.entity_id',array('shhirt_size'))
    ->where('at_int.value=30 AND cpf.shhirt_size='.$size.' AND at_int.attribute_id=(SELECT `attribute_id` FROM `eav_attribute` WHERE `attribute_code`="product_attrb_type_name") ')
    ;
}else {
    $q->where('at_int.value=30 AND at_int.attribute_id=(SELECT `attribute_id` FROM `eav_attribute` WHERE `attribute_code`="product_attrb_type_name") ' )
    ;
}

---

我使用了Haim Evgi的解决方案，并对其进行了轻微的修正

$subSelect = clone $products->getSelect(); $subSelect->reset() ->from($products->getTable('eav_attribute'), array('attribute_id')) ->where('`attribute_code`="product_attrb_type_name"'); $q = $products->getSelect() ->joinLeft(array('cat_product' => 'catalog_category_product'), 'cat_product.product_id=e.entity_id') ->joinLeft(array("at_int" => 'catalog_product_entity_int'), 'cat_product.product_id=at_int.entity_id') ->where('at_int.value=30') ->where('at_int.attribute_id=?', new Zend_Db_Expr(sprintf('(%s)', $subSelect))); if($size != ''){ $q->joinLeft(array('cpf'=>'catalog_product_flat_1'), 'cpf.entity_id=e.entity_id', array('shhirt_size')) ->where('cpf.shhirt_size=?', $size); }

---

但是@Aleksandr，当我试图打印\r$q时，我遇到了无法识别的方法“getData”问题；通过使用您的代码。请提出建议。@Srim，如果您想要查看查询，您应该将$q转换为字符串打印。\r字符串$qYes，我在子选择中出错了。请将$products->getTable'eav_attribute'替换为$products->getTable'eav/attribute'并尝试打印$subSelect