Category: 小小草

视表单为一个对象

It is a rigid rule that Zend_Form can not have elements of same names. If I add a second element with the same name, the first one will be overwritten.

When I started to use Zend_Form, I thought this rule makes life difficult. For example, if the form have “Next” and “Previous” buttons, I must give them different names. How can I tell which button is clicked? I must go through all names. I thought if these buttons could have same name but different value, it was easier to tell which button was clicked.

It was before long I started to enjoy this rigid rule. Take the above example for example, it is NOT a good practice to judge which button was clicked by its value. Because for an internationalised program, the value may change and that is out of the programmers’ control.

What if I want to add 5 text fields for people to fill in information like team members’ name? Two solutions. The first one looks stupid but I did not come across the second one at first.

Solution 1:

class MyNamespace_MyText extends Zend_Form_Element_Text {
	protected $_name = "text";

	public function init() {
		static $sequence = 0;
		$this->id = $this->_name . '_' . $sequence;
		$this->_label = "Label " . ($sequence + 1);
		$this->_name = $this->_name . '[' . $sequence . ']';
		$sequence ++;
	}
}

Solution 2:

for ($sequence = 0; $sequence < 5; ++$sequence) {
	$element = Mage::getModel('moduleName/modelName', "$sequence")
				->setBelongsTo('text'); //my form is inside Magento
}

今天想安装 drupal，装了N遍终于成功。一开始想装6.14版，安装过程开始时，我按提示把 sites/default 目录设置可写，把 default.settings.php 改名为 settings.php（提示不准确！），同时设置可写，结果在数据库安装页面反复过不去。

我联想到 Magento，猜想可能是因为 drupal 6.14 与 php 5.3.0 不兼容。

那再试试 drupal 5.20 吧。数据库安装页面倒过去了，安装能结束，但抛出一大屏错误。试着进入后台，每个页面都抛出错误，有些功能执行不了，比如修改口令。这样怎么行？继续研究。

我又看到 drupal 6.14 release notes，说 drupal 从 6.14 起 compatible with php 5.3.0 out of box。啊？说得这么斩钉截铁，那我重新再试。

终于发现有人提到 drupal 6.14，sites/default 目录下不可没有 default.settings.php，也不可没有 settings.php。压缩包里只有 default.settings.php，所以提示说把它改名 settings.php 是误导，正确的做法是，新建一个 settings.php（可以是空文件），或者拷贝 default.settings.php。这下安装通过了，但还是抛出一堆错误，并不比 drupal 5.20 少。

想了一下，可能是因为我没有给 drupal 6.14 一个全新的数据库，它是覆盖在原 5.20 的数据库上的，看来 6.14 安装过程不能自动升级数据库。于是再来一遍，这样终于成了（少数页面仍有小量错误）。

今天折腾了一个晚上，终于明白一个道理：PDT 下，入口文件不能使用 path mapping，服务器上必须有入口文件才能 debug on server。入口文件所调用的文件才能 path map。