Doctrine2 实体，告诉不要更新某些列

Question

我不想更新表格的某些列。

在问题表中，我只想更新问题列：

question:

id
question
created_by
created_at
modified_by
modified_at
is_Active

在上表列中，我不需要更新create_at、created_by、modified_by、modified_at、is_active 列。这是我正在使用的实体。

实体：

    <?php

    namespace Library\Entity;

    use Doctrine\ORM\Mapping as ORM;

    /**
     * Base class for all the Entities
     * This class maps id, active, created and modified columns 
     *
     * @author 

 */
/**
 * @ORM\MappedSuperclass
 */
class BaseEntity {

    /**
     * @ORM\Id
     * @ORM\GeneratedValue
     * @ORM\Column(name="id", type="integer")
     * @var integer
     */
    protected $id;

    /**
     * @ORM\Column(name="is_active", type="boolean")
     * @var boolean
     */
    protected $active;

    /**
     * @ORM\Column(name="created_at", type="datetime")
     * @var datetime
     */
    protected $createdAt;

    /**
     * @ORM\Column(name="created_by", type="integer", nullable=true)
     * @var integer
     */
    protected $createdBy;

    /**
     * @ORM\Column(name="modified_at", type="datetime")
     * @var datetime
     */
    protected $modifiedAt;

    /**
     * @ORM\Column(name="modified_by", type="integer")
     * @var integer
     */
    protected $modifiedBy;

    public function getId() {
        return $this->id;
    }

    public function getActive() {
        return $this->active;
    }

    public function getCreatedAt() {
        return $this->createdAt;
    }

    public function getCreatedBy() {
        return $this->createdBy;
    }

    public function getModifiedAt() {
        return $this->modifiedAt;
    }

    public function getModifiedBy() {
        return $this->modifiedBy;
    }

    public function setId($id) {
        $this->id = $id;
    }

    public function setActive($active) {
        $this->active = $active;
    }

    public function setCreatedAt($createdAt) {
        $this->createdAt = $createdAt;
    }

    public function setCreatedBy($createdBy) {
        $this->createdBy = $createdBy;
    }

    public function setModifiedAt($modifiedAt) {
        $this->modifiedAt = $modifiedAt;
    }

    public function setModifiedBy($modifiedBy) {
        $this->modifiedBy = $modifiedBy;
    }
}

这是我的Question 实体：

<?php

namespace Survey\Entity;

use Doctrine\Common\Collections\ArrayCollection;
use Doctrine\ORM\Mapping as ORM;
use Library\Entity\BaseEntity;
use Survey\Entity\Survey;

/**
 * Description of Survey Questions
 *
 * @author Mubarak
 */

/**
 * @ORM\Entity
 * @ORM\Table(name="survey_questions")
 */

class Question extends BaseEntity{

    /**
     * @ORM\Column(name="question", type="string")
     * @var string
     */
    protected $question;

    /**
     * @ORM\ManyToOne(targetEntity="Survey\Entity\Survey", inversedBy="questions")
     * @ORM\JoinColumn(name="survey_id", referencedColumnName="id")
     */
    private $surveys;

    public function getQuestion() {
        return $this->question;
    }

    public function setQuestion($question) {
        $this->question = $question;
    }

    public function getSurveys() {
        return $this->surveys;
    }

//    public function setSurveys(ArrayCollection $survey) {
    public function setSurveys(Survey $surveys = null) {
        $this->surveys = $surveys;
    }

//    public function __toString() {
//        return __CLASS__ . ": [id: {$this->id}, name: {$this->name}]";
//    }
}

这是我的更新功能：

public function updateQuestion($userId, $data ) {
        try{
            $surveyId = 1;
            $survey = $this->entityManager->getRepository('Survey\Entity\Survey')->find($surveyId);
            $question = new Question();
            $question->setQuestion($data['question']);
            $question->setSurveys($survey);
            $question->setId(1);
            $this->entityManager->merge($question);
            $this->entityManager->flush();
        } catch (Exception $ex) {
            throw new Exception("Couldnt update the Question");
        }

以下是我收到的错误消息：

执行 'UPDATEsurvey_questions SET is_active = ?, created_at = ?, created_by = ?, modified_at = ?, modified_by = ?哪里 id = ？ with params [null, null, null, null, null, 1]:\n\nSQLSTATE[23000]: 完整性约束违规: 1048 Column 'created_at' cannot be null

这是我的插入操作：

public function insertQuestion($userId, $survey, $questionArr) {
        try{
            $question = new Question();
            $question->setQuestion($questionArr['question']);
            $question->setSurveys($survey);
            $question->setActive(1);
            $question->setCreatedBy($userId);
            $question->setCreatedAt($this->createdAt);
            $question->setModifiedBy($userId);
            $question->setModifiedAt($this->modifiedAt);
            $this->entityManager->persist($question);
            $this->entityManager->flush();
            return $question;
        }catch(Exception $ex){
           throw new Exception("Couldnt insert the question");
        }
    }

Answer 1

问题是您正在创建一个新实体Question。

当调用EntityManager::flush()Doctrine 计算所有当前管理实体的变更集并将差异保存到数据库中。对于对象属性（@Column(type=”datetime”) 或 @Column(type=”object”)），这些比较始终通过引用进行。

“通过引用”很重要，因为您的新实体的所有日期时间字段都有null 值（而不是之前设置的\DateTime 实例）。当flush() 被调用时，Doctrine 正确检测到这些字段已更改并执行在 数据库 级别失败的查询。

“编辑”实体时在 Doctrine 中不需要 merge() 操作，这些操作用于分离需要再次管理的实例。

要解决这个问题，您应该首先加载实体的托管实例；然后修改字段并刷新。

$question = $entityManager->find(1);
$question->setQuestion($data['question']);
$entityManager->flush();