原则：将CURRENT_TIMESTAMP设置为数据库的默认值（即不是由PHP）

问题描述

查看周围一段时间后，我仍然找不到一种方法来获取数据库服务器插入的CURRENT_TIMESTAMP（默认值为 INSERT ）。

问题：当您将对象保留到数据库时，Doctrine将缺少的字段显式设置为NULL。所以看起来，在表定义中设置默认值，根本没有任何影响： - （

我不想设置时间PHP（例如 $ object-> setTimestamp（new \DateTime（））; ），因为这可能会返回与数据库服务器具有的不同的时间，如下所述：

我迄今为止所尝试的：

• 发送 NOW 例如 $ object-> setTimestamp（'NOW（）'）; ），如下所述：
  
  =>没有工作：错误：调用一个成员字符串上的函数format（）




• 在持久化之前从对象中删除timestamp属性（请参阅）也没有工作：无论如何，Doctrine将该字段设置为NULL。

我发现的任何其他解决方案（包括Doctrine扩展'Timestampable'）使用PHP的时间。

解决方案看看这个：它应该解决问题与错误：调用成员函数格式（）在字符串并强制SQL NOW（）要发送到数据库。

After looking around for a while, I still couldn't find a way to get CURRENT_TIMESTAMP inserted by the database server (as default value on INSERT).

The problem: When you persist an object to the database, missing fields are explicitly set to NULL by Doctrine. So it looks like, setting a default value in the table definition, doesn't have any effect at all :-(

I don't want to set the time through PHP (e.g. $object->setTimestamp(new \DateTime());) cause this might return a different time than what the database server has, as explained here: https://stackoverflow.com/a/3705090/1668200

What I've tried so far:

• Send in NOW literally (e.g. $object->setTimestamp('NOW()');), as explained here: https://stackoverflow.com/a/13850741/1668200
  => Didn't work: Error: Call to a member function format() on string

• Removing the 'timestamp' property from the object just before persisting it (see https://stackoverflow.com/a/3600758/1668200 ) didn't work either: The field was set to NULL by Doctrine anyway.

Any other solution I found (including the Doctrine extension 'Timestampable' https://github.com/Atlantic18/DoctrineExtensions/blob/master/doc/timestampable.md ) uses PHP's time.

解决方案

Have a look at this: https://stackoverflow.com/a/29384596/3255540 it should resolve the problem with Error: Call to a member function format() on string and force SQL NOW() to be sent to the database.

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