我是yiibie，我遇到的问题是我要删除的任何事件都没有被删除，而且它给了我一个错误
Error 500: <h1>CDbException</h1>
<p>CDbCommand failed to execute the SQL statement: SQLSTATE[23000]: Integrity constraint violation: 1451 Cannot delete or update a parent row: a foreign key constraint fails (`response_system`.`user_join_event`, CONSTRAINT `fk_user_join_event_event1` FOREIGN KEY (`event_id`) REFERENCES `event` (`id`) ON DELETE NO ACTION ON UPDATE NO ACTION). The SQL statement executed was: DELETE FROM `event` WHERE `event`.`id`=18 (C:\wamp\apps\yii\db\CDbCommand.php:357)</p><pre>#0 C:\wamp\apps\yii\db\ar\CActiveRecord.php(1745): CDbCommand->execute().
我可以轻松更新事件，就像我可以更新图像但我无法删除它。
这是我EventController
class EventController extends RController
{
/**
* @var string the default layout for the views. Defaults to '//layouts/column2', meaning
* using two-column layout. See 'protected/views/layouts/column2.php'.
*/
public $layout='//layouts/admin';
/**
* @return array action filters
*/
public function filters()
{
return array(
// 'accessControl', // perform access control for CRUD operations
// 'postOnly + delete', // we only allow deletion via POST request
'rights',
);
}
/**
* Specifies the access control rules.
* This method is used by the 'accessControl' filter.
* @return array access control rules
*/
public function accessRules()
{
return array(
array('allow', // allow all users to perform 'index' and 'view' actions
'actions'=>array('index','view'),
'users'=>array('*'),
),
array('allow', // allow authenticated user to perform 'create' and 'update' actions
'actions'=>array('create','update'),
'users'=>array('@'),
),
array('allow', // allow admin user to perform 'admin' and 'delete' actions
'actions'=>array('admin','delete'),
'users'=>array('admin'),
),
array('deny', // deny all users
'users'=>array('*'),
),
);
}
/**
* Displays a particular model.
* @param integer $id the ID of the model to be displayed
*/
public function actionView($id)
{
$this->render('view',array(
'model'=>$this->loadModel($id),
));
}
public function actionAllevent()
{
$allmodels=Event::model()->findAll(array('order'=>'id DESC'));
$this->layout='main';
$this->render('allevent' ,array('allmodels'=>$allmodels));
}
/**
* Creates a new model.
* If creation is successful, the browser will be redirected to the 'view' page.
*/
public function actionCreate()
{
$model=new Event;
// Uncomment the following line if AJAX validation is needed
// $this->performAjaxValidation($model);
if(isset($_POST['Event']))
{
$rnd = rand(0,9999); // generate random number between 0-9999
$model->attributes=$_POST['Event'];
$uploadedFile=CUploadedFile::getInstance($model,'image');
$fileName = "{$rnd}-{$uploadedFile}"; // random number + file name
$model->image = $fileName;
if($model->save())
{
$uploadedFile->saveAs(Yii::app()->basePath.'/../img/'.$fileName); // image will uplode to rootDirectory/event/
$this->redirect(array('admin'));
}
$this->redirect(array('view','id'=>$model->id));
}
$this->render('create',array(
'model'=>$model,
));
}
/**
* Updates a particular model.
* If update is successful, the browser will be redirected to the 'view' page.
* @param integer $id the ID of the model to be updated
*/
public function actionUpdate($id)
{
$model=$this->loadModel($id);
// Uncomment the following line if AJAX validation is needed
// $this->performAjaxValidation($model);
if(isset($_POST['Event']))
{
$_POST['Event']['image'] = $model->image;
$model->attributes=$_POST['Event'];
$uploadedFile=CUploadedFile::getInstance($model,'image');
if($model->save())
{
if(!empty($uploadedFile)) // check if uploaded file is set or not
{
$uploadedFile->saveAs(Yii::app()->basePath.'/../img/'.$model->image);
}
$this->redirect(array('admin'));
}
$this->redirect(array('view','id'=>$model->id));
}
$this->render('update',array(
'model'=>$model,
));
}
/**
* Deletes a particular model.
* If deletion is successful, the browser will be redirected to the 'admin' page.
* @param integer $id the ID of the model to be deleted
*/
public function actionDelete($id)
{
if(Yii::app()->request->isPostRequest)
{
// we only allow deletion via POST request
$this->loadModel($id)->delete();
// if AJAX request (triggered by deletion via admin grid view), we should not redirect the browser
if(!isset($_GET['ajax']))
$this->redirect(isset($_POST['returnUrl']) ? $_POST['returnUrl'] : array('admin'));
}
else
throw new CHttpException(400,'Invalid request. Please do not repeat this request again.');
}
/**
* Lists all models.
*/
public function actionIndex()
{
$dataProvider=new CActiveDataProvider('Event');
$this->render('index',array(
'dataProvider'=>$dataProvider,
));
}
/**
* Manages all models.
*/
public function actionAdmin()
{
$model=new Event('search');
$model->unsetAttributes(); // clear any default values
if(isset($_GET['Event']))
$model->attributes=$_GET['Event'];
$this->render('admin',array(
'model'=>$model,
));
}
/**
* Returns the data model based on the primary key given in the GET variable.
* If the data model is not found, an HTTP exception will be raised.
* @param integer $id the ID of the model to be loaded
* @return Event the loaded model
* @throws CHttpException
*/
public function loadModel($id)
{
$model=Event::model()->findByPk($id);
if($model===null)
throw new CHttpException(404,'The requested page does not exist.');
return $model;
}
/**
* Performs the AJAX validation.
* @param Event $model the model to be validated
*/
protected function performAjaxValidation($model)
{
if(isset($_POST['ajax']) && $_POST['ajax']==='event-form')
{
echo CActiveForm::validate($model);
Yii::app()->end();
}
}
}
这是我的Event model
<?php
/**
* This is the model class for table "event".
*
* The followings are the available columns in table 'event':
* @property integer $id
* @property string $image
*
* The followings are the available model relations:
* @property UserJoinEvent[] $userJoinEvents
*/
class Event extends CActiveRecord
{
/**
* Returns the static model of the specified AR class.
* @param string $className active record class name.
* @return Event the static model class
*/
public static function model($className=__CLASS__)
{
return parent::model($className);
}
/**
* @return string the associated database table name
*/
public function tableName()
{
return 'event';
}
/**
* @return array validation rules for model attributes.
*/
public function rules()
{
// NOTE: you should only define rules for those attributes that
// will receive user inputs.
return array(
array('image', 'required'),
array('image', 'length', 'max'=>45),
// The following rule is used by search().
// Please remove those attributes that should not be searched.
array('id, image', 'safe', 'on'=>'search'),
// this will allow empty field when page is update (remember here i create scenario update)
array('image', 'file','types'=>'jpg, gif, png, mp4', 'allowEmpty'=>true, 'safe'=>false, 'on'=>'insert,update'),
array('image', 'length', 'max'=>255, 'on'=>'insert,update'),
);
}
/**
* @return array relational rules.
*/
public function relations()
{
// NOTE: you may need to adjust the relation name and the related
// class name for the relations automatically generated below.
return array(
'userJoinEvents' => array(self::HAS_MANY, 'UserJoinEvent', 'event_event_id'),
);
}
/**
* @return array customized attribute labels (name=>label)
*/
public function attributeLabels()
{
return array(
'id' => 'ID',
'image' => 'Image',
);
}
/**
* Retrieves a list of models based on the current search/filter conditions.
* @return CActiveDataProvider the data provider that can return the models based on the search/filter conditions.
*/
public function search()
{
// Warning: Please modify the following code to remove attributes that
// should not be searched.
$criteria=new CDbCriteria;
$criteria->compare('id',$this->id);
$criteria->compare('image',$this->image,true);
return new CActiveDataProvider($this, array(
'criteria'=>$criteria,
));
}
}
这是我的view file(_form.php)
<?php
/* @var $this EventController */
/* @var $model Event */
/* @var $form BSActiveForm */
?>
<?php $form=$this->beginWidget('bootstrap.widgets.BsActiveForm', array(
'id'=>'event-form',
// Please note: When you enable ajax validation, make sure the corresponding
// controller action is handling ajax validation correctly.
// There is a call to performAjaxValidation() commented in generated controller code.
// See class documentation of CActiveForm for details on this.
'enableAjaxValidation'=>false,
//form options array...
'htmlOptions' => array(
'enctype' => 'multipart/form-data',
),
));
?>
<p class="help-block">Fields with <span class="required">*</span> are required.</p>
<?php echo $form->errorSummary($model); ?>
<?php //echo $form->textFieldControlGroup($model,'image',array('maxlength'=>45)); ?>
<!--this is for data path entry-->
<div class="row">
<?php echo $form->labelEx($model,'image'); ?>
<?php echo CHtml::activeFileField($model, 'image'); ?> <!--by this we can upload image-->
<?php echo $form->error($model,'image'); ?>
</div>
<?php if($model->isNewRecord!='1') ?>
<div class="row">
<?php echo CHtml::image(Yii::app()->request->baseUrl.'/img/'.$model->image,"",array("width"=>200)); ?> <!--Image shown here if page is update page-->
</div>
<br>
<?php echo BsHtml::submitButton('Submit', array('color' => BsHtml::BUTTON_COLOR_PRIMARY)); ?>
<?php $this->endWidget(); ?>
这是userjoinevent表的结构
表user_join_event
--
CREATE TABLE IF NOT EXISTS `user_join_event` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`user_id` int(11) NOT NULL,
`event_id` int(11) NOT NULL,
`date_created` varchar(45) DEFAULT NULL,
`date_modified` varchar(45) DEFAULT NULL,
PRIMARY KEY (`id`),
KEY `fk_user_join_event_user1_idx` (`user_id`),
KEY `fk_user_join_event_event1_idx` (`event_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 AUTO_INCREMENT=91 ;
这是表
的约束ALTER TABLE `user_join_event`
ADD CONSTRAINT `fk_user_join_event_event1` FOREIGN KEY (`event_id`) REFERENCES `event` (`id`) ON DELETE NO ACTION ON UPDATE NO ACTION,
ADD CONSTRAINT `fk_user_join_event_user1` FOREIGN KEY (`user_id`) REFERENCES `user` (`id`) ON DELETE NO ACTION ON UPDATE NO ACTION;
这是UserJoinEvent模型
<?php
/**
* This is the model class for table "user_join_event".
*
* The followings are the available columns in table 'user_join_event':
* @property integer $id
* @property integer $user_id
* @property integer $event_id
* @property string $date_created
* @property string $date_modified
*
* The followings are the available model relations:
* @property Event $event
* @property User $user
*/
class UserJoinEvent extends CActiveRecord
{
/**
* Returns the static model of the specified AR class.
* @param string $className active record class name.
* @return UserJoinEvent the static model class
*/
public static function model($className=__CLASS__)
{
return parent::model($className);
}
/**
* @return string the associated database table name
*/
public function tableName()
{
return 'user_join_event';
}
/**
* @return array validation rules for model attributes.
*/
public function rules()
{
// NOTE: you should only define rules for those attributes that
// will receive user inputs.
return array(
array('user_id, event_id', 'required'),
array('user_id, event_id', 'numerical', 'integerOnly'=>true),
array('date_created, date_modified', 'length', 'max'=>45),
// The following rule is used by search().
// Please remove those attributes that should not be searched.
array('id, user_id, event_id, date_created, date_modified', 'safe', 'on'=>'search'),
array('date_modified','default', 'value'=>new CDbExpression('NOW()'),//automatically add the current date in mysql feild
'setOnEmpty'=>false,'on'=>'update'),
array('date_created,date_modified','default', 'value'=>new CDbExpression('NOW()'),'setOnEmpty'=>false,'on'=>'insert'),
);
}
/**
* @return array relational rules.
*/
public function relations()
{
// NOTE: you may need to adjust the relation name and the related
// class name for the relations automatically generated below.
return array(
'event' => array(self::BELONGS_TO, 'Event', 'event_id'),
'user' => array(self::BELONGS_TO, 'User', 'user_id'),
);
}
/**
* @return array customized attribute labels (name=>label)
*/
public function attributeLabels()
{
return array(
'id' => 'ID',
'user_id' => 'User',
'event_id' => 'Event',
'date_created' => 'Date Created',
'date_modified' => 'Date Modified',
);
}
/**
* Retrieves a list of models based on the current search/filter conditions.
* @return CActiveDataProvider the data provider that can return the models based on the search/filter conditions.
*/
public function search()
{
// Warning: Please modify the following code to remove attributes that
// should not be searched.
$criteria=new CDbCriteria;
$criteria->compare('id',$this->id);
$criteria->compare('user_id',$this->user_id);
$criteria->compare('event_id',$this->event_id);
$criteria->compare('date_created',$this->date_created,true);
$criteria->compare('date_modified',$this->date_modified,true);
return new CActiveDataProvider($this, array(
'criteria'=>$criteria,
));
}
}
请帮帮我，谢谢。
答案 0 :(得分：1)
这个问题与表user_join_event有Eevent链接到User Event的事实有关。然后，当您尝试删除事件时，DB会引发错误，因为某些user_join_event行仍然没有引用。 这意味着在删除事件之前必须删除相关的孩子。 （我建议你在执行代码之前复制一下表格）
public function actionDelete($id)
{
if(Yii::app()->request->isPostRequest)
{
// we only allow deletion via POST request
$modelUserEvents = UserJoinEvent::model()->findAllByAttributes( array('event_id'=>$id));
if isset($modelUserEvents){
foreach($modelUserEvents as $child){
$child->delete();
}
}
$this->loadModel($id)->delete();
// if AJAX request (triggered by deletion via admin grid view), we should not redirect the browser
if(!isset($_GET['ajax']))
$this->redirect(isset($_POST['returnUrl']) ? $_POST['returnUrl'] : array('admin'));
}
else
throw new CHttpException(400,'Invalid request. Please do not repeat this request again.');
}
答案 1 :(得分：0)
您与UserJoinEvent表有关系，并且该限制导致错误原因，因此从UserJoinEvent表（父表）中删除行