我正在学习Yii框架，我得到了这个错误，并没有真正指出我正在处理的具体页面，或者据我所知告诉我应该从哪里开始寻找我的问题。
我如何理解这一点？据我所知，我所有的'type_id'引用都是正确输入的。
CException
Description
Property "Project.type_id" is not defined.
Source File
/Users/user/Dropbox/localhost/yii/framework/db/ar/CActiveRecord.php(107)
00095: */
00096: public function __get($name)
00097: {
00098: if(isset($this->_attributes[$name]))
00099: return $this->_attributes[$name];
00100: else if(isset($this->getMetaData()->columns[$name]))
00101: return null;
00102: else if(isset($this->_related[$name]))
00103: return $this->_related[$name];
00104: else if(isset($this->getMetaData()->relations[$name]))
00105: return $this->getRelated($name);
00106: else
00107: return parent::__get($name);
00108: }
00109:
00110: /**
00111: * PHP setter magic method.
00112: * This method is overridden so that AR attributes can be accessed like properties.
00113: * @param string property name
00114: * @param mixed property value
00115: */
00116: public function __set($name,$value)
00117: {
00118: if($this->setAttribute($name,$value)===false)
00119: {
Stack Trace
#0 /Users/user/Dropbox/localhost/yii/framework/db/ar/CActiveRecord.php(107): CComponent->__get('type_id')
#1 /Users/user/Dropbox/localhost/trackstar/protected/views/project/_view.php(15): CActiveRecord->__get('type_id')
#2 /Users/user/Dropbox/localhost/yii/framework/web/CBaseController.php(119): require('/Users/user/Dro...')
#3 /Users/user/Dropbox/localhost/yii/framework/web/CBaseController.php(88): CBaseController->renderInternal('/Users/user/Dro...', Array, true)
#4 /Users/user/Dropbox/localhost/yii/framework/web/CController.php(748): CBaseController->renderFile('/Users/user/Dro...', Array, true)
#5 /Users/user/Dropbox/localhost/yii/framework/zii/widgets/CListView.php(215): CController->renderPartial('_view', Array)
#6 /Users/user/Dropbox/localhost/yii/framework/zii/widgets/CBaseListView.php(152): CListView->renderItems()
#7 [internal function]: CBaseListView->renderSection(Array)
#8 /Users/user/Dropbox/localhost/yii/framework/zii/widgets/CBaseListView.php(135): preg_replace_callback('/{(\w+)}/', Array, '{summary}?{sort...')
#9 /Users/user/Dropbox/localhost/yii/framework/zii/widgets/CBaseListView.php(121): CBaseListView->renderContent()
#10 /Users/user/Dropbox/localhost/yii/framework/web/CBaseController.php(174): CBaseListView->run()
#11 /Users/user/Dropbox/localhost/trackstar/protected/views/project/index.php(17): CBaseController->widget('zii.widgets.CLi...', Array)
#12 /Users/user/Dropbox/localhost/yii/framework/web/CBaseController.php(119): require('/Users/user/Dro...')
#13 /Users/user/Dropbox/localhost/yii/framework/web/CBaseController.php(88): CBaseController->renderInternal('/Users/user/Dro...', Array, true)
#14 /Users/user/Dropbox/localhost/yii/framework/web/CController.php(748): CBaseController->renderFile('/Users/user/Dro...', Array, true)
#15 /Users/user/Dropbox/localhost/yii/framework/web/CController.php(687): CController->renderPartial('index', Array, true)
#16 /Users/user/Dropbox/localhost/trackstar/protected/controllers/ProjectController.php(148): CController->render('index', Array)
#17 /Users/user/Dropbox/localhost/yii/framework/web/actions/CInlineAction.php(32): ProjectController->actionIndex()
#18 /Users/user/Dropbox/localhost/yii/framework/web/CController.php(300): CInlineAction->run()
#19 /Users/user/Dropbox/localhost/yii/framework/web/filters/CFilterChain.php(129): CController->runAction(Object(CInlineAction))
#20 /Users/user/Dropbox/localhost/yii/framework/web/filters/CFilter.php(41): CFilterChain->run()
#21 /Users/user/Dropbox/localhost/yii/framework/web/CController.php(999): CFilter->filter(Object(CFilterChain))
#22 /Users/user/Dropbox/localhost/yii/framework/web/filters/CInlineFilter.php(59): CController->filterAccessControl(Object(CFilterChain))
#23 /Users/user/Dropbox/localhost/yii/framework/web/filters/CFilterChain.php(126): CInlineFilter->filter(Object(CFilterChain))
#24 /Users/user/Dropbox/localhost/yii/framework/web/CController.php(283): CFilterChain->run()
#25 /Users/user/Dropbox/localhost/yii/framework/web/CController.php(257): CController->runActionWithFilters(Object(CInlineAction), Array)
#26 /Users/user/Dropbox/localhost/yii/framework/web/CWebApplication.php(320): CController->run('')
#27 /Users/user/Dropbox/localhost/yii/framework/web/CWebApplication.php(120): CWebApplication->runController('project')
#28 /Users/user/Dropbox/localhost/yii/framework/base/CApplication.php(135): CWebApplication->processRequest()
#29 /Users/user/Dropbox/localhost/trackstar/index.php(12): CApplication->run()
#30 {main}
2011-10-17 18:17:18 Apache/2.2.17 (Unix) mod_ssl/2.2.17 OpenSSL/0.9.8r DAV/2 PHP/5.3.6 Yii Framework/1.1.2
答案 0 :(得分：1)
在文件中 /Users/user/Dropbox/localhost/trackstar/protected/views/project/_view.php 在第15行 有一些像$ project-＆gt; type_id的东西 但是在Project模型中没有属性“type_id”
答案 1 :(得分：1)
如果Project类没有对象属性$type_id，那么它将检查此模型的db表中是否存在type_id列。
此外，如果仍未找到该列，则会尝试搜索名为getType_id()的方法，此处有解释。
Yii实现PHP Magic方法__get（$ name）和__set（$ name，$ value），允许您（尤其是在CActiveRecord中）访问从db表中的列生成的属性，或者使用该类从类中的其他常规属性遵循语法。
object->isNewRecord; // '__get()' is called
object->getIsNewRecord(); // regular syntax without magic method
object->isNewRecord = true; // '__set()' is called
object->setIsNewRecord(true);
答案 2 :(得分：1)
问题是您的一个观点认为您的模型具有此属性。 例如，我从模型中删除了一个列，但我正在调用一个视图（_search），这引用了该列：
<?php echo $form->label($model,'thumbnail'); ?>
25
<?php echo $form->textField($model,'thumbnail',array('size'=>60,'maxlength'=>255)); ?>
我用过：
find . -name "*" | xargs grep -l "my_property"
追踪违规财产