How to use standard fields like crdate and cruser_id with TYPO3 and extbase?

This works in TYPO3 8.7 and 9.5

model:

/**
 * @var \DateTime
 */
protected $crdate = null;


/**
 * Returns the creation date
 *
 * @return \DateTime $crdate
 */
public function getCrdate()
{
    return $this->crdate;
}

TCA -> add this in the colums;

'columns' => [
    'crdate' => [
        'config' => [
            'type' => 'passthrough',
        ],
    ],

    ...

]

First, the table fields are named as crdate, and cruser so getters should be named getCrdate and get getCruser

Next in your model you need to add a field and a getter:

/** @var int */
protected $crdate;

/**
* Returns the crdate
*
* @return int
*/
public function getCrdate() {
    return $this->crdate;
}

(do the same with cruser field)

And finally in you setup.txt most probably you'll need to add a mappings for these fields:

config.tx_extbase.persistence.classes {
    Tx_Someext_Domain_Model_Somemodel {
        mapping {
            columns.crdate.mapOnProperty = crdate
            columns.cruser.mapOnProperty = cruser    
        }
    }
}

Of course, don't forget to use proper names in the settings, and clear the cache after changes in the code

This works for me with TYPO3 6.2.11

model:

/**
 * tstamp
 *
 * @var int
 */
protected $tstamp;


/**
 * @return int $tstamp
 */
public function getTstamp() {
    return $this->tstamp;
}

TS:

config.tx_extbase.persistence.classes {
    STUBR\Stellen\Domain\Model\Institution {
        mapping {
            tableName = tx_stellen_domain_model_institution
            columns {
                tstamp.mapOnProperty = tstamp
            }
        }
    }
}

PS Thanks https://github.com/castiron/cicbase