插入后 MySQL 中的 CDbCommand 失败错误答案

【问题标题】：CDbCommand failed error in MySQL after insert插入后 MySQL 中的 CDbCommand 失败错误
【发布时间】：2012-02-08 13:02:49
【问题描述】：

我有一个用于 Group 和 Member 的 MySQL 数据库。当我要在 Group 模型中插入任何记录时，这里一切都很好，但是当我要在 Member 模型中插入任何数据时，它会显示这样的错误

CDbCommand failed to execute the SQL statement: SQLSTATE[23000]: Integrity constraint violation: 1452 Cannot add or update a child row: a foreign key constraint fails (`tbl_groupapp`.`tbl_member`, CONSTRAINT `FK_member_group` FOREIGN KEY (`group_id`) REFERENCES `tbl_group` (`id`) ON DELETE CASCADE). The SQL statement executed was: INSERT INTO `tbl_member` (`firstname`, `lastname`, `gender`, `membersince`) VALUES (:yp0, :yp1, :yp2, :yp3)

我不知道为什么会在这里发生。这是我的数据库架构

--
-- Table structure for table `tbl_group`
--

CREATE TABLE IF NOT EXISTS `tbl_group` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `name` varchar(80) COLLATE utf8_unicode_ci NOT NULL DEFAULT '',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB  DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci AUTO_INCREMENT=53 ;

--
-- Dumping data for table `tbl_group`
--

INSERT INTO `tbl_group` (`id`, `name`) VALUES
(37, 'Test Group'),
(38, 'bdbsdsb'),
(39, 'ruieryei'),
(40, 'dbshdbs'),
(41, 'dbshdbs'),
(42, 'dbshdbs'),
(43, 'dbshdbs'),
(44, 'dbshdbs'),
(45, 'dbshdbs'),
(46, 'dbshdbs'),
(47, 'dbshdbs'),
(48, 'dbshdbs'),
(49, 'dbshdbs'),
(50, 'group name'),
(51, 'group name'),
(52, 'dbshdbs');

-- --------------------------------------------------------

--
-- Table structure for table `tbl_member`
--

CREATE TABLE IF NOT EXISTS `tbl_member` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `group_id` int(11) NOT NULL,
  `firstname` varchar(80) COLLATE utf8_unicode_ci NOT NULL DEFAULT '',
  `lastname` varchar(80) COLLATE utf8_unicode_ci NOT NULL DEFAULT '',
  `gender` varchar(10) COLLATE utf8_unicode_ci NOT NULL DEFAULT '',
  `membersince` datetime NOT NULL,
  PRIMARY KEY (`id`),
  KEY `FK_member_group` (`group_id`)
) ENGINE=InnoDB  DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci AUTO_INCREMENT=52 ;

--
-- Dumping data for table `tbl_member`
--

INSERT INTO `tbl_member` (`id`, `group_id`, `firstname`, `lastname`, `gender`, `membersince`) VALUES
(31, 37, 'First Name', 'Second Name', 'male', '2012-02-22 00:00:00'),
(32, 38, 'dsadsmadnas', 'jieo/uwoe', 'female', '2012-02-16 00:00:00'),
(33, 39, 'rerhejrgejh', 'nmbfdnfb,d', 'male', '2012-02-23 00:00:00'),
(34, 40, 'test group', 'test group', '', '0000-00-00 00:00:00'),
(35, 41, 'test group1', 'test group2', '', '0000-00-00 00:00:00'),
(36, 42, 'test group1', 'test group2', '', '0000-00-00 00:00:00'),
(37, 43, 'test group', 'test group2', '', '0000-00-00 00:00:00'),
(38, 44, 'test group1', 'test group2', '', '0000-00-00 00:00:00'),
(39, 45, 'test group', 'test group2', '', '0000-00-00 00:00:00'),
(40, 46, 'test group', 'test group2', '', '0000-00-00 00:00:00'),
(41, 47, 'test group1', 'test group2', 'male', '0000-00-00 00:00:00'),
(42, 48, 'test group1', 'test group2', 'm', '0000-00-00 00:00:00'),
(43, 49, 'test group1', 'test group2', 'Male', '0000-00-00 00:00:00'),
(44, 50, 'firstname ', 'secondname', 'Male', '0000-00-00 00:00:00'),
(45, 51, 'test group', 'test group', 'Male', '2012-02-28 00:00:00'),
(46, 52, 'test group', 'test group2', 'Male', '2012-02-15 00:00:00');

-- --------------------------------------------------------

--
-- Constraints for table `tbl_member`
--
ALTER TABLE `tbl_member`
  ADD CONSTRAINT `FK_member_group` FOREIGN KEY (`group_id`) REFERENCES `tbl_group` (`id`) ON DELETE CASCADE;

任何帮助和建议都将不胜感激。这是会员的表格文件

<div class="form">

<?php $form=$this->beginWidget('CActiveForm', array(
  'id'=>'member-form',
  'enableAjaxValidation'=>false,
)); ?>

  <p class="note">Fields with <span class="required">*</span> are required.</p>

  <?php echo $form->errorSummary($model); ?>

  <div class="row">
    <?php echo $form->labelEx($model,'group_id'); ?>
    <?php echo $form->textField($model,'group_id'); ?>
    <?php echo $form->error($model,'group_id'); ?>
  </div>

  <div class="row">
    <?php echo $form->labelEx($model,'firstname'); ?>
    <?php echo $form->textField($model,'firstname',array('size'=>60,'maxlength'=>80)); ?>
    <?php echo $form->error($model,'firstname'); ?>
  </div>

  <div class="row">
    <?php echo $form->labelEx($model,'lastname'); ?>
    <?php echo $form->textField($model,'lastname',array('size'=>60,'maxlength'=>80)); ?>
    <?php echo $form->error($model,'lastname'); ?>
  </div>

  <div class="row">
    <?php echo $form->labelEx($model,'gender'); ?>
    <?php echo $form->textField($model,'gender',array('size'=>10,'maxlength'=>10)); ?>
    <?php echo $form->error($model,'gender'); ?>
  </div>

  <div class="row">
    <?php echo $form->labelEx($model,'membersince'); ?>
    <?php echo $form->textField($model,'membersince'); ?>
    <?php echo $form->error($model,'membersince'); ?>
  </div>

  <div class="row buttons">
    <?php echo CHtml::submitButton($model->isNewRecord ? 'Create' : 'Save'); ?>
  </div>

<?php $this->endWidget(); ?>

</div><!-- form -->

会员的控制器代码

<?php

class MemberController extends Controller
{
  /**
   * @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/column2';

  /**
   * @return array action filters
   */
  public function filters()
  {
    return array(
      'accessControl', // perform access control for CRUD operations
    );
  }

  /**
   * 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),
    ));
  }

  /**
   * Creates a new model.
   * If creation is successful, the browser will be redirected to the 'view' page.
   */
  public function actionCreate()
  {
    $model=new Member;

    // Uncomment the following line if AJAX validation is needed
    // $this->performAjaxValidation($model);

    if(isset($_POST['Member']))
    {
      $model->attributes=$_POST['Member'];
      if($model->save())
        $this->redirect(array('view','id'=>$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['Member']))
    {
      $model->attributes=$_POST['Member'];
      if($model->save())
        $this->redirect(array('view','id'=>$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('Member');
    $this->render('index',array(
      'dataProvider'=>$dataProvider,
    ));
  }

  /**
   * Manages all models.
   */
  public function actionAdmin()
  {
    $model=new Member('search');
    $model->unsetAttributes();  // clear any default values
    if(isset($_GET['Member']))
      $model->attributes=$_GET['Member'];

    $this->render('admin',array(
      'model'=>$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 the ID of the model to be loaded
   */
  public function loadModel($id)
  {
    $model=Member::model()->findByPk($id);
    if($model===null)
      throw new CHttpException(404,'The requested page does not exist.');
    return $model;
  }

  /**
   * Performs the AJAX validation.
   * @param CModel the model to be validated
   */
  protected function performAjaxValidation($model)
  {
    if(isset($_POST['ajax']) && $_POST['ajax']==='member-form')
    {
      echo CActiveForm::validate($model);
      Yii::app()->end();
    }
  }
}

【问题讨论】：

您的架构很好，您正在尝试从表单插入，对吗？如果是这样，请参阅下面的答案，如果您需要有关表格的帮助，请告诉我。
我已经在我的表单中给出了 group_id 但仍然出现错误。我已经用表单文件更新了我的问题。
好的，那个表格看起来不错。那么请控制器。
ok.controller 看起来也不错。那么在测试时，您是否在文本字段中设置/输入了正确的 group_id？
好吧..我错了。我为此提供了随机 id。这就是我收到错误的原因。你能告诉我如何解决这个问题，这样我就可以在没有任何 id 的情况下保存表单放在表格里？

标签： mysql database yii relational-database foreign-key-relationship

【解决方案1】：

看起来您错过了将外键 group id 插入表中，从您得到的错误中可以看出，如下所示：

执行的 SQL 语句为：INSERT INTO tbl_member (firstname, lastname, gender, membersince) VALUES (:yp0, :yp1, :yp2, :yp3)

基本上您还必须插入 group_id，因此将 group_id 输入字段也添加到您的成员模型表单中。

如果您需要更多帮助，请告诉我。

【讨论】：

感谢您的回复。我使用了 Yii 多模型，并且在 Group 的控制器中调用了 Member，我可以将两个模型都保存在那里。但是在 Member 模型中它显示错误。所以我再次认为我必须在其中调用 Group 模型
如果您可以分享您的控制器代码，以及会员的表单代码，我们可以准确指出丢失的代码。因此，如果您愿意，请提供代码。
ok..先试试这个，echo $form->dropDownList($model,'group_id',CHtml::listData(Group::model()->findAll(),' id','name'));
将该下拉列表而不是您在表单中用于 group_id 的文本字段
好的..从您在问题中的评论..您确定要从表单中删除 id 吗？还是要让用户选择组？跨度>