TYPO3 Core

My table TCA searchFields are:

'searchFields' => '......,customer_number',

My field configuration is

'customer_number' => [
            .......
            'config' => [
                'type' => 'input',
                'size' => 30,
                'eval' => 'int, unique',
                'readOnly' => 1,
                'max' => 11
            ],
        ],

In case I put number as a search phrase in TYPO3 main backend search I can find my record.

In case I put number as a search phrase in TYPO3 list view search I can not find my record.

Related core code: https://github.com/TYPO3/TYPO3.CMS/blob/TYPO3_8-7/typo3/sysext/recordlist/Classes/RecordList/AbstractDatabaseRecordList.php#L979
TYPO3 is excluding from searchFields those fields which has "int" in "eval" configuration field.

Workaround for that is to add pidonly configuration so my field looks like:

'customer_number' => [
            ...
            'config' => [
                'type' => 'input',
                'size' => 30,
                'eval' => 'int, unique',
                'readOnly' => 1,
                'max' => 11,
                'search' => [
                    'pidonly' => 'pidonly'
                ]
            ],
        ],

This looks strange for me and I consider it as a TYPO3 bug. Also https://docs.typo3.org/m/typo3/reference-tca/master/en-us/ColumnsConfig/Type/Input.html#id77 says pidonly should be bool but it have effect only if it is 'pidonly' => 'pidonly' because in_array function usage in https://github.com/TYPO3/TYPO3.CMS/blob/TYPO3_8-7/typo3/sysext/recordlist/Classes/RecordList/AbstractDatabaseRecordList.php#L990.