没有在magento中找到已定义的块

Question

我正在按照本教程http://codemagento.com/2011/03/creating-custom-magento-reports/创建简单的报告模块.我有所有代码和XML,但我收到此错误

2012-05-31T21:48:43+00:00 ERR (3): Recoverable Error: Argument 1 passed to Mage_Adminhtml_Controller_Action::_addContent() must be an instance of Mage_Core_Block_Abstract, boolean given, called in /var/www/magento/app/code/local/Super/Awesome/controllers/Adminhtml/Report/ExampleController.php on line 22 and defined  in /var/www/magento/app/code/core/Mage/Adminhtml/Controller/Action.php on line 112

结构看起来像这样

Super
  |_ Awesome
      |_Block
      |   |_Adminhtml
      |       |_Report
      |          |_Simple
      |          |   |_Grid.php
      |          |_Simple.php
      |_controllers
      |    |_Adminhtml
      |       |_Report
      |          |_ExampleController.php
      |_etc
      |   |_adminhtml.xml
      |   |_config.xml
      |_Helper
      |   |_Data.php
      |_Model
            |_Mysql4
            |    |_Report
            |    |   |_Simple
            |    |      |_Collection.php
            |    |_Simple.php
            |_Simple.php

我假设它没有找到块代码,但为什么？

编辑

<?xml version="1.0"?>
<config>
  <modules>
    <Super_Awesome>
      <version>0.1.0</version>
    </Super_Awesome>
  </modules>
  <admin>
    <!--
        Here we are telling the Magento router to look for the controllers in the Super_Awesome_controllers_Adminhtml before we look in the
        Mage_Adminhtml module for all urls that begin with /admin/controller_name
     -->
    <routers>
      <adminhtml>
        <args>
          <modules>
            <awesome before="Mage_Adminhtml">Super_Awesome_Adminhtml</awesome>
          </modules>
        </args>
      </adminhtml>
    </routers>
  </admin>
  <models>
    <awesome>
      <class>Super_Awesome_Model</class>
      <resourceModel>awesome_mysql4</resourceModel>
    </awesome>
    <awesome_mysql4>
      <class>Super_Awesome_Model_Mysql4</class>
      <entities>
        <simple>
          <table>super_awesome_example_simple</table>
        </simple>
      </entities>
    </awesome_mysql4>
  </models>
  <global>
    <resources>
      <awesome_setup>
        <setup>
          <module>Super_Awesome</module>
          <class>Super_Awesome_Model_Mysql4_Setup</class>
        </setup>
        <connection>
          <use>core_setup</use>
        </connection>
      </awesome_setup>
      <awesome_write>
        <connection>
          <use>core_write</use>
        </connection>
      </awesome_write>
      <awesome_read>
        <connection>
          <use>core_read</use>
        </connection>
      </awesome_read>
    </resources>
    <helpers>
      <awesome>
        <class>Super_Awesome_Helper</class>
      </awesome>
    </helpers>
  </global>
</config>

文件:app/code/local/Super/Awesome/Block/Adminhtml/Report/Simple.php

class Super_Awesome_Block_Adminhtml_Report_Simple extends Mage_Adminhtml_Block_Widget_Grid_Container
{
    public function __construct()
    {
        $this->_blockGroup = 'awesome';
        $this->_controller = 'adminhtml_report_simple';
        $this->_headerText = Mage::helper('awesome')->__('Simple Report');
        parent::__construct();
        $this->_removeButton('add');
    }
}

Answer 1

当您(或Magento)使用以下代码时

$this->getLayout()->createBlock('awesome/adminhtml_report_simple')

你说的

请adminhtml_report_simple从该awesome组中创建一个块

Magento需要知道要用于来自awesome组的块的类的基本名称.如果你没有告诉Magento该类的基本名称是什么用于来自真棒组的块,它就无法实例化一个块.这就是为什么调用该方法false而不是返回一个块对象的原因,这就是为什么你得到那个例外.

您需要通过在配置中添加一个部分来"打开"模块块.基于上面的示例,您已经为辅助类做了类似的事情.

<config>
    <global>
        <helpers>
            <awesome>
                <class>Super_Awesome_Helper</class>
            </awesome>
        </helpers>
    </global>
</config>

这就是你的模块可以使用辅助类的原因.你只需要为块类 做同样的事情

<config>
    <global>
        <blocks>
            <awesome>
                <class>Super_Awesome_Helper</class>
            </awesome>
        </blocks>
    </global>
</config>

那个和缓存清除应该让你正确.如果它不起作用,请跟踪createBlock以确定它在blocks/awesome节点配置中的位置.这通常足以让我注意到我已经开始了两个小时的拼写错误.