深刻的学说记录

Question

我想在symfony项目中对doctrine记录进行深层复制/克隆.使用$ deep = true,现有副本($ deep)-method无法正常工作.

举个例子,我们来看看课堂课程.本课有一个开始和结束日期,它们之间有几个休息时间.这个教室正在建设中.

课间休息是一对多的关系,因此课程中可能会有很多休息时间.课程建设是一种多对一的关系,所以课程只能在一栋楼里.

如果我想复制房间,也应该复制休息时间.建筑应该保持不变(这里没有副本).

我在网上找到了一些示例,它们创建了一个PHP类,它从sfDoctrineRecord扩展并覆盖了copy-method.

我试过的是:

class BaseDoctrineRecord extends sfDoctrineRecord {
    public function copy($deep = false) {
        $ret = parent::copy(false);
        if (!$deep)
            return $ret;

        // ensure to have loaded all references (unlike Doctrine_Record)
        foreach ($this->getTable()->getRelations() as $name => $relation) {
            // ignore ONE sides of relationships
            if ($relation->getType() == Doctrine_Relation::MANY) {
                if (empty($this->$name))
                    $this->loadReference($name);

                // do the deep copy
                foreach ($this->$name as $record)
                    $ret->{$name}[] = $record->copy($deep);
            }
        }
        return $ret;
    }
}

现在这会导致失败: Doctrine_Connection_Mysql_Exception: SQLSTATE[23000]: Integrity constraint violation: 1062 Duplicate entry '2-1' for key 'PRIMARY'

所以我需要"取消"新记录($ ret)的id,因为这应该是一个新记录.我应该在哪里以及如何做？

更新:错误已通过以下代码修复:

class BaseDoctrineRecord extends sfDoctrineRecord {
    public function copy($deep = false)  {
        $ret = parent::copy(false);

        if($this->Table->getIdentifierType() === Doctrine_Core::IDENTIFIER_AUTOINC) {
            $id = $this->Table->getIdentifier();
            $this->_data[$id] = null;
        }

        if(!$deep) {
            return $ret;
        }

        // ensure to have loaded all references (unlike Doctrine_Record)
        foreach($this->getTable()->getRelations() as $name => $relation) {
            // ignore ONE sides of relationships
            if($relation->getType() == Doctrine_Relation::MANY) {
                if(empty($this->$name)) {
                    $this->loadReference($name);
                }

                // do the deep copy
                foreach($this->$name as $record) {
                    $ret->{$name}[] = $record->copy($deep);
                }
            }
        }

        return $ret;
    }
}

但它效果不好.在DoctrineCollection课程中 - >打破所有新的休息时间都很好.但它们不会保存在数据库中.我想要复制课程,并在7天内添加时间:

foreach($new_shift->Breaks as $break) {
    $break->start_at = $this->addOneWeek($break->start_at);
    $break->end_at = $this->addOneWeek($break->end_at);
    $break->save();
}

如你所见,中断被保存,但似乎它们不在数据库中.

Answer 1

这对我有用，它是问题代码的变体：

public function realCopy($deep = false) {
    $ret = self::copy(false);

    if(!$deep) {
        return $ret;
    }

    // ensure to have loaded all references (unlike Doctrine_Record)
    foreach($this->getTable()->getRelations() as $name => $relation) {
        // ignore ONE sides of relationships
        if($relation->getType() == Doctrine_Relation::MANY) {
            if(empty($this->$name)) {
                $this->loadReference($name);
            }

            // do the deep copy
            foreach($this->$name as $record) {
                $ret->{$name}[] = $record->realCopy($deep);
            }
        }
    }

    // this need to be at the end to ensure Doctrine is able to load the relations data
    if($this->Table->getIdentifierType() === Doctrine_Core::IDENTIFIER_AUTOINC) {
        $id = $this->Table->getIdentifier();
        $this->_data[$id] = null;
    }

    return $ret;
}

我不敢相信我在 2017 年就在使用 Doctrine 1.2。