Verifying the $TCA¶
You may find it necessary – at some point – to verify the full
structure of the
$GLOBALS['TCA'] in your TYPO3 installation. The SYSTEM >
Configuration module makes it possible to have an overview of the
$GLOBALS['TCA'], with all customizations taken into account.
The Configuration module is part of the lowlevel system extension. In composer mode you can install it with:
composer req typo3/cms-lowlevel
If you cannot find your new field, it probably means that you have made some mistake.
This view is also useful when trying to find out where to insert a new field, to explore the combination of types and palettes that may be used for the table that we want to extend.