Question

这个问题在stackoverflow上被多次询问，但没有一个帮助过我。

我有3张桌子：

student
subject
student_subject

问题：当我尝试插入数据时，行会插入到student和subject表中，但不会插入到student_subject表中。

环境保护：

CodeIginter 2.2
Doctrine 2.4
XAMPP
PHP 5.5.15
Apache 2.4.4
mysql 5.0.11
Windows 8.1 x64 pro

数据库模式上的详细信息：我的表结构是：

student_subject表：

mysql> desc student_subject;
+------------+---------+------+-----+---------+----------------+
| Field      | Type    | Null | Key | Default | Extra          |
+------------+---------+------+-----+---------+----------------+
| id         | int(11) | NO   | PRI | NULL    | auto_increment |
| student_id | int(11) | YES  | MUL | NULL    |                |
| subject_id | int(11) | YES  | MUL | NULL    |                |
+------------+---------+------+-----+---------+----------------+
3 rows in set (0.00 sec)

subject表：

mysql> desc student;
+-------+--------------+------+-----+---------+----------------+
| Field | Type         | Null | Key | Default | Extra          |
+-------+--------------+------+-----+---------+----------------+
| id    | int(11)      | NO   | PRI | NULL    | auto_increment |
| name  | varchar(255) | YES  |     | NULL    |                |
| class | char(1)      | YES  |     | NULL    |                |
+-------+--------------+------+-----+---------+----------------+
3 rows in set (0.00 sec)

subject表：

mysql> desc subject;
+--------+--------------+------+-----+---------+----------------+
| Field  | Type         | Null | Key | Default | Extra          |
+--------+--------------+------+-----+---------+----------------+
| id     | int(11)      | NO   | PRI | NULL    | auto_increment |
| name   | varchar(255) | YES  |     | NULL    |                |
| author | varchar(255) | YES  |     | NULL    |                |
+--------+--------------+------+-----+---------+----------------+
3 rows in set (0.00 sec)

PHP上的详细信息（CodeIgniter）代码：

C:\xampp\htdocs\test_orm\application\libraries\doctrine.php：

<?php
use Doctrine\Common\ClassLoader,
    Doctrine\ORM\Configuration,
    Doctrine\ORM\EntityManager,
    Doctrine\Common\Cache\ArrayCache,
    Doctrine\DBAL\Logging\EchoSQLLogger,
    Doctrine\ORM\Mapping\Driver\DatabaseDriver,
    Doctrine\ORM\Tools\DisconnectedClassMetadataFactory,
    Doctrine\ORM\Tools\EntityGenerator;

/**
 * CodeIgniter Smarty Class
 *
 * initializes basic doctrine settings and act as doctrine object
 *
 * @final       Doctrine
 * @category    Libraries
 */
class Doctrine {

  /**
   * @var EntityManager $em
   */
    public $em = null;

  /**
   * constructor
   */
  public function __construct()
  {
    // load database configuration from CodeIgniter
    require APPPATH.'config/database.php';

    // Set up class loading. You could use different autoloaders, provided by your favorite framework,
    // if you want to.
    require_once APPPATH.'third_party/Doctrine/Common/ClassLoader.php';

    $doctrineClassLoader = new ClassLoader('Doctrine',  APPPATH.'third_party');
    $doctrineClassLoader->register();
    $entitiesClassLoader = new ClassLoader('models', rtrim(APPPATH, "/" ));
    $entitiesClassLoader->register();
    $proxiesClassLoader = new ClassLoader('proxies', APPPATH.'models');
    $proxiesClassLoader->register();

    // Set up caches
    $config = new Configuration;
    $cache = new ArrayCache;
    $config->setMetadataCacheImpl($cache);
    $driverImpl = $config->newDefaultAnnotationDriver(array(APPPATH.'models/Entities'));
    $config->setMetadataDriverImpl($driverImpl);
    $config->setQueryCacheImpl($cache);

    // Proxy configuration
    $config->setProxyDir(APPPATH.'models/proxies');
    $config->setProxyNamespace('Proxies');

    // Set up logger
    //$logger = new EchoSQLLogger;
    //$config->setSQLLogger($logger);

    $config->setAutoGenerateProxyClasses( TRUE );  
    // Database connection information
    $connectionOptions = array(
        'driver' => 'pdo_mysql',
        'user' =>     $db['default']['username'],
        'password' => $db['default']['password'],
        'host' =>     $db['default']['hostname'],
        'dbname' =>   $db['default']['database']
    );

    // Create EntityManager
    $this->em = EntityManager::create($connectionOptions, $config);  

        $this->em->getConfiguration()
                ->setMetadataDriverImpl(
                    new DatabaseDriver(
                            $this->em->getConnection()->getSchemaManager()
                    )
        );

    //$this->generate_classes(); 
    }
    /**
     * generate entity objects automatically from mysql db tables
     * @return none
     */
    function generate_classes(){    


        $cmf = new DisconnectedClassMetadataFactory();
        $cmf->setEntityManager($this->em);
        $metadata = $cmf->getAllMetadata();    
        $generator = new EntityGenerator();

        $generator->setUpdateEntityIfExists(true);
        $generator->setGenerateStubMethods(true);
        $generator->setGenerateAnnotations(true);
        $generator->generate($metadata, APPPATH."models/Entities");

    }

}

C:\xampp\htdocs\test_orm\application\models\Entities\Subject.php

<?php



use Doctrine\ORM\Mapping as ORM;
use Doctrine\Common\Collections\ArrayCollection;

/**
 * Subject
 *
 * @ORM\Table(name="subject")
 * @ORM\Entity
 */
class Subject
{

    public function __construct() {
        $this->students = new ArrayCollection();
    }

    /**
     * @var integer
     *
     * @ORM\Column(name="id", type="integer", nullable=false)
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="IDENTITY")
     */
    private $id;

    /**
     * @var string
     *
     * @ORM\Column(name="name", type="string", length=255, nullable=true)
     */
    private $name;

    /**
     * @var string
     *
     * @ORM\Column(name="author", type="string", length=255, nullable=true)
     */
    private $author;


    /**
     * @ORM\ManyToMany(targetEntity="Student" mappedBy="subjects")
     */
    protected $students;

    /**
     * Get id
     *
     * @return integer 
     */
    public function getId()
    {
        return $this->id;
    }

    /**
     * Set name
     *
     * @param string $name
     * @return Subject
     */
    public function setName($name)
    {
        $this->name = $name;

        return $this;
    }

    /**
     * Get name
     *
     * @return string 
     */
    public function getName()
    {
        return $this->name;
    }

    /**
     * Set author
     *
     * @param string $author
     * @return Subject
     */
    public function setAuthor($author)
    {
        $this->author = $author;

        return $this;
    }

    /**
     * Get author
     *
     * @return string 
     */
    public function getAuthor()
    {
        return $this->author;
    }

    /**
     * Add the Student to Subject
     *
     * @param Student $student
     * @return void
     */
    public function addStudent(Student $student){
        $student->addSubject($this);
        $this->students[] =$student;
    }

    public function getStudents () {
        return $this->students;
    }
}

C:\xampp\htdocs\test_orm\application\models\Entities\Student.php

<?php

use Doctrine\ORM\Mapping as ORM;
use Doctrine\Common\Collections\ArrayCollection;

/**
 * Student
 *
 * @ORM\Table(name="student")
 * @ORM\Entity
 */
class Student
{

    public function __construct() {
        $this->subjects = new ArrayCollection();
    }

    /**
     * @var integer
     *
     * @ORM\Column(name="id", type="integer", nullable=false)
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="IDENTITY")
     */
    private $id;

    /**
     * @var string
     *
     * @ORM\Column(name="name", type="string", length=255, nullable=true)
     */
    private $name;

    /**
     * @var string
     *
     * @ORM\Column(name="class", type="string", length=1, nullable=true)
     */
    private $class;

    /**
     * @ORM\ManyToMany(targetEntity="Subject", inversedBy="students")
     * @ORM\JoinTable(name="student_subject")    
     */
    protected $subjects;

    /**
     * Get id
     *
     * @return integer 
     */
    public function getId()
    {
        return $this->id;
    }

    /**
     * Set name
     *
     * @param string $name
     * @return Student
     */
    public function setName($name)
    {
        $this->name = $name;

        return $this;
    }

    /**
     * Get name
     *
     * @return string 
     */
    public function getName()
    {
        return $this->name;
    }

    /**
     * Set class
     *
     * @param string $class
     * @return Student
     */
    public function setClass($class)
    {
        $this->class = $class;

        return $this;
    }

    /**
     * Get class
     *
     * @return string 
     */
    public function getClass()
    {
        return $this->class;
    }

    /**
     * Add the Subject to Student
     *
     * @param Subject $subject
     * @return void
     */
    public function addSubject(Subject $subject){
        //$subject->addStudent($this);
        $this->subjects[] = $subject;
    }

    public function getSubjects () {
        return $this->subjects;
    }
}

C:\xampp\htdocs\test_orm\application\models\StudentModel.php

<?php
require_once(APPPATH."models/Entities/Student.php");
require_once(APPPATH."models/Entities/Subject.php");
//use Doctrine\ORM\EntityManager;
use \Student;
use \Subject;

class StudentModel extends CI_Model {

    /**    
     * @var \Doctrine\ORM\EntityManager $em
     */
    var $em;

    public function __construct() {
        parent::__construct();
        $this->em = $this->doctrine->em;
    }

    /**
     * Add contact messages to database
     * @param array $contact_form
     * @return bool
     */
    public function addSubject()
    {   
        /**
         * @var Student $student
         */
        $student = new Student();
        $student->setName("Musa Haidari");
        $student->setClass("BCS");

        $subject = new Subject();
        $subject->setName("JAVA");
        $subject->setAuthor("XXX");
        $this->em->persist($subject);

        $subject = new Subject();
        $subject->setName("PHP");
        $subject->setAuthor("YYY");
        $this->em->persist($subject);

        $student->addSubject($subject);        
        $this->em->persist($student);

        try {
            //save to database
            $this->em->flush();
        }
        catch(Exception $err){

            die($err->getMessage());
        }
        return true;       
    }
}

C:\xampp\htdocs\test_orm\application\controllers\Landing.php

类着陆扩展了CI_Controller {

public function index()
{
    $this->load->view('welcome_message');
}

public function addStudentSubjectLog () {
    $this->load->model('StudentModel');

    $this->StudentModel->addSubject();

    echo "<br /><br />Done!<br /><br />";
}

}

要插入数据，我在浏览器中输入此URL：

http://localhost/test_orm/Landing/addStudentSubjectLog

Answer 1

我认为您应该从//$subject->addStudent($this);实体的addSubject函数中取消注释Student行。

另外，从您$student->addSubject($this);实体的addStudent函数中删除行Subject。

我认为在向$student添加$subject之前，您还应该保留$student->addSubject($subject); $this->em->persist($student);对象。基本上切换这两行：

$scope.myObject

希望这有帮助。

在doctrine 2.4和CodeIgniter 2.2中，数据不会以多对多关系插入到第3个表中

1 个答案: