原则 2：在 DateTimeType.php 中调用非对象上的成员函数 format() ...
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Doctrine 2: Call to a member function format() on a non-object ... in DateTimeType.php
提问by Jiew Meng
I have a DateTimefield:
我有一个DateTime领域：
/**
* Date time posted
* @Column(type="datetime")
*/
private $dtPosted;
which is set to a default value by using a LifeCycleCallback
使用 LifeCycleCallback 设置为默认值
/**
* @PrePersist
*/
function onPrePersist() {
// set default date
$this->dtPosted = date('Y-m-d H:m:s');
I am getting the following error:
我收到以下错误：
Fatal error: Call to a member function format() on a non-object in D:\ResourceLibrary\Frameworks\Doctrine\lib\Doctrine\DBAL\Types\DateTimeType.php on line 46
致命错误：在第 46 行调用 D:\ResourceLibrary\Frameworks\Doctrine\lib\Doctrine\DBAL\Types\DateTimeType.php 中的非对象上的成员函数 format()
回答by romanb
The date()function returns a string. The datetimetype works with DateTimeobjects. So either change the mapping type to stringor use DateTimeobjects.
该date()函数返回一个字符串。该datetime类型适用于DateTime对象。因此，要么将映射类型更改为string或使用DateTime对象。
回答by space_balls
you could always use:
你总是可以使用：
$this->updated = new \DateTime("now");
http://www.doctrine-project.org/docs/orm/2.0/en/cookbook/working-with-datetime.html
http://www.doctrine-project.org/docs/orm/2.0/en/cookbook/working-with-datetime.html
回答by MediaVince
Try and use your setCreated with annotations for @ORM\PrePersist and setUpdated with annotations for @ORM\PrePersist and @ORM\PreUpdate methods as opposed to prePersist and preUpdate methods...
尝试使用带有@ORM\PrePersist 注释的setCreated 和带有@ORM\PrePersist 和@ORM\PreUpdate 方法注释的setUpdated，而不是prePersist 和preUpdate 方法......
/**
* @ORM\PrePersist
*/
public function setCreated()
{
$this->created = new \DateTime();
}
/**
* @ORM\PrePersist
* @ORM\PreUpdate
*/
public function setUpdated()
{
$this->updated = new \DateTime();
}
回答by Adam Elsodaney
I came across a similar problem, but with a timefield, and this question and @romanb 's answer helped.
我遇到了类似的问题，但有一个time领域，这个问题和@romanb 的回答有帮助。
I was getting the following error, much like the one in the question.
我收到以下错误，很像问题中的错误。
Call to a member function format() on a non-object in
... /vendor/doctrine/dbal/lib/Doctrine/DBAL/Types/TimeType.php on line 50
The solution was similar, for fields of the timedatatype, Doctrine will accept an instance of PHP's DateInterval
解决方案是类似的，对于time数据类型的字段，Doctrine 将接受 PHP 的一个实例DateInterval
$quizFixture1->setCompletionTime(\DateInterval::createFromDateString('743 seconds'));
