Magento Collections（按特定顺序按类型ID获取产品

Question

I want to get a collection of products from magento in a specific order.

1. Simple Products
2. Configurable Products
3. Grouped Products

How would I add a filter that will retrieve the products in that order

Answer 1

It's not possible directly. I have 2 solutions:

1. Get your products in 3 different collections using addAttributeToFilter where attribute name is type_id. For the condition you can use Mage_Catalog_Model_Product_Type::TYPE_SIMPLE, Mage_Catalog_Model_Product_Type::TYPE_CONFIGURABLE and Mage_Catalog_Model_Product_Type::TYPE_GROUPED.

Example:

$simple_products = $model->getCollection()
        ->addAttributeToSelect('*')
        ->addAttributeToFilter('type_id', Mage_Catalog_Model_Product_Type::TYPE_SIMPLE);

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2. Add custom attribute from the admin panel (e.g. 1 for simple, 2 for configurable, 3 for grouped products etc.) and use it with addAttributeToSort.