Magento:如何从观察者的admin中的现有表单中获取magento fieldset

Question

我试图在观察者中以现有的管理形式获取fieldset时遇到问题.我正在获取表单但是当我尝试获取fieldset时我得到了很好的错误:致命错误:在非对象上调用成员函数addField()当我直接添加这个新字段时,一切都很好,除了它在外部场地.

$form = $observer->getBlock()->getForm();
$fieldset = $form->getFieldset('fieldset_id');
$fieldset->addField('some_field', 'text', array(
    'name' => 'some_field',
    'label' => Mage::helper('cms')->__('Some Field'),
    'title' => Mage::helper('cms')->__('Some Field')
  )
);

Answer 1

好的,我做到了.这是我的坏事.我采取了错误的块类型.这是代码:

public function onAdminhtmlBlockHtmlBefore(Varien_Event_Observer $observer)
{
    $block = $observer->getBlock();
    if (!isset($block)) return;

    switch ($block->getType()) {
    case 'adminhtml/some_edit_tab_main':
    $form = $block->getForm();
        $fieldset = $form->getElement('base_fieldset');
        $fieldset->addField('some_field', 'text', array(
                'name' => 'some_field',
                'label' => Mage::helper('cms')->__('Some Field'),
                'title' => Mage::helper('cms')->__('Some Field')
            )
        );
        break;
    }
}