Magento产品集合限制通过XML [英] Magento Product Collection Limit via XML

问题描述

我有一个bestsellers模块，我写了，它的工作伟大，但我想能够改变通过XML返回的集合大小，而不是php / phtml。

像这样：

 < block type =catalog / product_listname = bestsellerslimit =3
 template =custom / bestsellers.phtml/> 
  

或类似：

 < block type =catalog / product_listname =bestsellers
 template =custom / bestsellers.phtml> 
< action method =setLimit> 3< / action> 
< / block>这是可能吗？
 
  b     m当前正在通过phtml改变限制：
   - > setPageSize（3）
  - > setCurPage 1）; 
  
但是这是硬编码和讨厌，我需要能够使用我的phtml文件作为模板
 
 
 
提前感谢任何人可以阐明这一点！
解决方案
块 Mage_Catalog_Block_Product_List 继承 Varien_Object 包含方法 getData（）和 setData（）的类以及魔术方法 get *（）和 set *（）。这些方法允许我们在对象中存储（你猜到）键控数据。
 
 
 
 < action /> 标签在XML中允许我们对块实例执行方法调用。您的第二个示例就近了，但语法是：
 < block type =catalog / product_list =bestsellers> 
< action method =setLimit>< value> 3< / value>< / action& 
< / block> 
  
这相当于：
 < block type =catalog / product_listname =bestsellers> 
< action method =setData>< key> limit< / key>< value> 3< / value>< / action& 
< / block> 
  
这大致相当于：
  $ block = new Mage_Catalog_Block_Product_List（）; 
 $ block-> setLimit（3）; 
  
在对象中设置数据，我们现在可以通过 getData ）$ this-> getLimit（）通过调用或或 $ this-> getData（'limit'）制作我们的块代码：
   - > setPageSize（$ this-> getLimit（））
  - > setCurPage（1）; 
  
您应该检查 limit 数据，如果XML中没有提供，则提供默认值。
 
 
 
 注意： < action /> 标记无关紧要。这是重要的参数的顺序。我们可以直接调用< action method =setLimit>< foo> 3< / foo>< / action>  。
 
I've got a bestsellers module which I've written and it works great, however I want to be able to change the collection size it returns via the XML, rather than the php/phtml.

Something like this: 
    <block type="catalog/product_list" name="bestsellers" limit="3" 
template="custom/bestsellers.phtml" />
or something like:
    <block type="catalog/product_list" name="bestsellers" 
template="custom/bestsellers.phtml">
         <action method="setLimit">3</action>
    </block>
Is this possible?

I'm currently changing the limit via the phtml with:
->setPageSize(3)
->setCurPage(1);
But that is hard coded and nasty, I need to be able to use my phtml file as template for many cases of the bestsellers module being called from anywhere with the XML + limit in the XML.

Thanks in advance if anyone can shed light on this!
解决方案
The block Mage_Catalog_Block_Product_List inherits from the Varien_Object class which contains the methods getData() and setData(), as well as the magic methods get*() and set*().  These methods allow us to store (you guessed it) keyed-data within an object.

The <action /> tags in the XML allows us to perform method calls on the block instances.  You're nearly there with your second example, but the syntax is:
<block type="catalog/product_list" name="bestsellers">
    <action method="setLimit"><value>3</value></action>
</block>
Which is equivalent to:
<block type="catalog/product_list" name="bestsellers">
    <action method="setData"><key>limit</key><value>3</value></action>
</block>
Which is roughly equivalent to:
$block = new Mage_Catalog_Block_Product_List();
$block->setLimit(3);
With the data set in the object we can now access through the getData() or get*() methods by calling $this->getLimit() or $this->getData('limit') making our block code:
->setPageSize($this->getLimit())
->setCurPage(1);
You should probably perform a check for the existence of the limit data first and provide a default value if none is provided in the XML.

Note: The name of the children in the <action /> tag don't matter.  It's the order of the arguments that's important.  We could just as well have called <action method="setLimit"><foo>3</foo></action> and it still would have worked.

                        
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