Author: 芳草苑主

今天发现，我的所有的 admin controller 都写成了 extends Mage_Adminhtml_Controller_action。虽然不影响使用，我还是想把它改规范的驼峰式 Mage_Adminhtml_Controller_Action。

于是搜索了整个硬盘到底哪些文件里包含 Mage_Adminhtml_Controller_action，结果发现这个笔误还不少。而且不光我写的 modules 里有，Aheadworks, J2t, Plieninger 的代码里也有，最后发现源头是 koukou1985 的 Magento module creator。

看来 Magento module creator 流传甚广。

Magento EAV framework is very promising, but not easy to understand. When the code is mixed with typos, it becomes even more confusing.

Mage_Catalog_Model_Resource_Eav_Mysql4_Setup provides a template for setting up an attribute.

'name' => array(
'type'              => 'varchar',
'backend'           => '',
'frontend'          => '',
'label'             => 'Name',
'input'             => 'text',
'class'             => '',
'source'            => '',
'global'            => Mage_Catalog_Model_Resource_Eav_Attribute::SCOPE_STORE,
'visible'           => true,
'required'          => true,
'user_defined'      => false,
'default'           => '',
'searchable'        => false,
'filterable'        => false,
'comparable'        => false,
'visible_on_front'  => false,
'unique'            => false,
)

However, ‘class’ is wrong. It should be ‘frontend_class’. It refers to DOM class attribute assigned to this entity attribute output html. It can be used for value validation before submission. The possible classes can be found in js/prototype/validation.js. But frontend_class can be set anything you like for css styling or other purposes.

这介于 bug 与 usability issue 之间：

Moving category 使 category url 发生变化后，该 category 所属产品无法 add to compare，Compare, Compared, Viewed sidebars 统统不正常。

我在 Magento 1.4.2.0 上发现这个问题，或许早先版本一直存在这个问题。我认为它象 bug，是因为 moving category 后 Magento 不提示 reindex index。

解决办法也很简单，就是 moving category 后，用 System >> Index Management reindex 一下。

在 Magento app/design/frontend/base/default/layout/catalog.xml 文件里有一段让我费解的配置：

<catalog_category_layered_nochildren translate="label">
    <label>Catalog Category (Without Subcategories)</label>
    <remove name="right.reports.product.viewed" />
    <reference name="right">
        <block type="reports/product_viewed" before="right.permanent.callout" name="left.reports.product.viewed" template="reports/product_viewed.phtml" />
    </reference>
</catalog_category_layered_nochildren>

catalog_category_layered_nochildren，从字面上看，应该是只对 is_anchor == 1 并没有子目录的目录有效；但事实上，它对所有没有子目录的目录有效，所以我想，handle 应该取名 catalog_category_nochildren 更合适。Mage_Catalog_CategoryController::viewAction() 里有一段

if (!$category->hasChildren()) {
    $update->addHandle('catalog_category_layered_nochildren');
}

由此可见这里仅检验 hasChildren，未检验 getIsAnchor。

catalog.xml 里把 right.reports.product.viewed 移除又添加，重新添加后 block 叫 left.reports.product.viewed，但实际位置仍在右边。这么做有什么意义？我费神地看了半天，得出的结论是：

没有意义。大概 Magento 是借此演示一下 layout syntax。

虽然没有意义，但是影响还是有的，有这一段，nochildren 的 category page sidebar 排序为 Compare, Compared, Viewed；否则排序为 Compare, Viewed, Compared。

有人要我对 Magento layer navigation 做些小修改，我觉得修修补补没有意义，要做就做一系列的修改，于是按我觉得可以改进的方向，列了以下几点。

Add ajax load/change products on page loads or filter changes (TODO)

Add option to show/hide category filter

Add option to show price filter as slidebar (TODO)

Add option to control price accuracy

Add up to 3 sort by’s (TODO)
(Someone already asked for a second sort by)

Add option to show/hide sort by’s (TODO)

Add option to or not to merge sort asc/desc into sort by dropdown (TODO)

Add sort by’s position (TODO)
(Magento native code can control filter attributes’ position, but cannot control sort by attributes’ position)

Add recursive walk-through function to sort by settings for category and its child categories (TODO)

I tried Magento 1.4.2.0 RC1 today, and noticed it had added “Include in Navigation Menu” option in Manage Category.

I am very happy seeing this because I made it happen before Magento did. I call it “Exclude in Top Navigation”. I also have added an option “Exclude in Sitemap” which is not available in newest version of Magento.

So, I keep pace with Magento, and vice versa?