Magento resource model filter and limit

Question

嗨，当使用Mage :: getResourceModel在magent中获取资源模型时，我可以添加过滤器没有问题，但是如何将结果集限制为5或10？

Answer 1

Assuming you're talking about Magento Collections, the ORM uses a paging style interface to limit things. You tell the collection how big you want each page to be ( setPageSize ), then you tell it which page you want to be on ( setCurPage ).

//same as, and "better" than Mage:getResourceModel('catalog/product_collection');
Mage::getModel('catalog/product')
->getCollection()
->setPageSize(10)->setCurPage(1);     //first 10 items


Mage::getModel('catalog/product')
->getCollection()
->setPageSize(10)->setCurPage(2);     //second 10 items

///etc...

Answer 2

$select->limit(5)  

检查app/core/mage/Catalog/Model/Resource/Eav/Mysql4/Url.php的_getProducts()方法（第806行）