Question

我正在尝试创建一个模型，用于选择特定产品及其所有属性。

$products = Mage::getModel('catalog/product')->getCollection()->addAttributeToSelect('*');

但遗憾的是，虽然我之前已经做了数百次，但我们有一个Magento的时刻......

echo $products->getSelect()->__toString();

显示 - ＆gt; addAttributeToSelect忽略了我。

SELECT `e`.* FROM `catalog_product_entity` AS `e`

当然，在典型的Magento时尚中，没有任何例外或错误。

我在自己的Adminhtml Grid块中调用这些方法，禁用缓存（尽管我知道Magento在禁用缓存时仍会缓存一些模型数据（我删除了var / cache）。

我甚至不能这样做：

->addAttributeToSelect('name');

我真的开始放松对这个平台的耐心，我已经使用它4个月了，似乎浪费的时间多于节省的时间。任何帮助都可以节省生命！

Answer 1

您需要深入了解Magento以了解Magento ORM的工作原理（EAV structure的内容以及collections的实际工作方式）。

为了获得所有产品属性，这是正确的：

$collection = Mage::getModel('catalog/product')->getCollection()->addAttributeToSelect('*');

您缺少的是Magento在您执行此操作时不会向您提供所有相关查询的事实：

echo $collection->getSelect()//note: you don't need __toString(), read about OOP in PHP5

当您运行代码以获取集合时，Magento将仅运行以下查询：

SELECT `e`.* FROM `catalog_product_entity` AS `e`

当您开始循环收集集合时：

$collection = Mage::getModel('catalog/product')->getCollection()->addAttributeToSelect('*');
foreach($collection as $p) {
    echo $p->getName()."\n";//you can use in here any getCustomAttribute method
}

Magento将运行其他查询以获取所有属性和值：

SELECT `main_table`.`entity_type_id`, `main_table`.`attribute_code`, `main_table`.`attribute_model`, `main_table`.`backend_model`, `main_table`.`backend_type`, `main_table`.`backend_table`, `main_table`.`frontend_model`, `main_table`.`frontend_input`, `main_table`.`frontend_label`, `main_table`.`frontend_class`, `main_table`.`source_model`, `main_table`.`is_required`, `main_table`.`is_user_defined`, `main_table`.`default_value`, `main_table`.`is_unique`, `main_table`.`note`, `additional_table`.* FROM `eav_attribute` AS `main_table`
 INNER JOIN `catalog_eav_attribute` AS `additional_table` ON additional_table.attribute_id = main_table.attribute_id WHERE (main_table.entity_type_id = 10)

SELECT `t_d`.`entity_id`, `t_d`.`attribute_id`, `t_d`.`value` AS `default_value`, `t_s`.`value` AS `store_value`, IF(t_s.value_id IS NULL, t_d.value, t_s.value) AS `value` FROM `catalog_product_entity_text` AS `t_d`
 LEFT JOIN `catalog_product_entity_text` AS `t_s` ON t_s.attribute_id = t_d.attribute_id AND t_s.entity_id = t_d.entity_id AND t_s.store_id = 1 WHERE (t_d.entity_type_id = 10) AND (t_d.entity_id IN (16, 17, 18, 19, 20, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 41, 42, 44, 45, 46, 47, 48, 49, 51, 52, 53, 54, 74, 75, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166)) AND (t_d.attribute_id IN ('496', '507', '531', '97', '494', '509', '499', '492', '498', '104', '495', '497', '936', '500', '476', '506')) AND (t_d.store_id = 0) UNION ALL SELECT `t_d`.`entity_id`, `t_d`.`attribute_id`, `t_d`.`value` AS `default_value`, `t_s`.`value` AS `store_value`, IF(t_s.value_id IS NULL, t_d.value, t_s.value) AS `value` FROM `catalog_product_entity_int` AS `t_d`
 LEFT JOIN `catalog_product_entity_int` AS `t_s` ON t_s.attribute_id = t_d.attribute_id AND t_s.entity_id = t_d.entity_id AND t_s.store_id = 1 WHERE (t_d.entity_type_id = 10) AND (t_d.entity_id IN (16, 17, 18, 19, 20, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 41, 42, 44, 45, 46, 47, 48, 49, 51, 52, 53, 54, 74, 75, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166)) AND (t_d.attribute_id IN ('272', '510', '875', '877', '903', '501', '935', '952', '904', '102', '513', '110', '859', '862', '508', '863', '525', '502', '107', '860', '273', '274', '526', '861')) AND (t_d.store_id = 0) UNION ALL SELECT `t_d`.`entity_id`, `t_d`.`attribute_id`, `t_d`.`value` AS `default_value`, `t_s`.`value` AS `store_value`, IF(t_s.value_id IS NULL, t_d.value, t_s.value) AS `value` FROM `catalog_product_entity_decimal` AS `t_d`
 LEFT JOIN `catalog_product_entity_decimal` AS `t_s` ON t_s.attribute_id = t_d.attribute_id AND t_s.entity_id = t_d.entity_id AND t_s.store_id = 1 WHERE (t_d.entity_type_id = 10) AND (t_d.entity_id IN (16, 17, 18, 19, 20, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 41, 42, 44, 45, 46, 47, 48, 49, 51, 52, 53, 54, 74, 75, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166)) AND (t_d.attribute_id IN ('100', '960', '503', '943', '99', '567', '270', '101')) AND (t_d.store_id = 0) UNION ALL SELECT `t_d`.`entity_id`, `t_d`.`attribute_id`, `t_d`.`value` AS `default_value`, `t_s`.`value` AS `store_value`, IF(t_s.value_id IS NULL, t_d.value, t_s.value) AS `value` FROM `catalog_product_entity_varchar` AS `t_d`
 LEFT JOIN `catalog_product_entity_varchar` AS `t_s` ON t_s.attribute_id = t_d.attribute_id AND t_s.entity_id = t_d.entity_id AND t_s.store_id = 1 WHERE (t_d.entity_type_id = 10) AND (t_d.entity_id IN (16, 17, 18, 19, 20, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 41, 42, 44, 45, 46, 47, 48, 49, 51, 52, 53, 54, 74, 75, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166)) AND (t_d.attribute_id IN ('940', '571', '271', '562', '878', '106', '879', '906', '873', '703', '105', '103', '942', '941', '96', '836', '931', '874', '876', '905', '109', '880', '493', '881', '481', '570')) AND (t_d.store_id = 0) UNION ALL SELECT `t_d`.`entity_id`, `t_d`.`attribute_id`, `t_d`.`value` AS `default_value`, `t_s`.`value` AS `store_value`, IF(t_s.value_id IS NULL, t_d.value, t_s.value) AS `value` FROM `catalog_product_entity_datetime` AS `t_d`
 LEFT JOIN `catalog_product_entity_datetime` AS `t_s` ON t_s.attribute_id = t_d.attribute_id AND t_s.entity_id = t_d.entity_id AND t_s.store_id = 1 WHERE (t_d.entity_type_id = 10) AND (t_d.entity_id IN (16, 17, 18, 19, 20, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 41, 42, 44, 45, 46, 47, 48, 49, 51, 52, 53, 54, 74, 75, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166)) AND (t_d.attribute_id IN ('572', '573', '704', '705', '568', '569')) AND (t_d.store_id = 0)

要了解有关在各种上下文中运行哪些查询的更多信息，请创建一个空脚本，仅加载Mage::app()并使用集合，并在Varien_Db_Adapter_Pdo_Mysql中将$ _logAllQueries设置为true。其他信息：here。

Magento产品系列选择所有属性

1 个答案: