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This chapter explains how to create a field that makes it possible to create relations to files.
TYPO3 CMS provides a convenient API for this.
Let's look at the TCA configuration the
image field of the
table for example (with some parts skipped).
'image' => [ 'label' => 'LLL:EXT:core/Resources/Private/Language/locallang_general.xlf:LGL.images', 'config' => \TYPO3\CMS\Core\Utility\ExtensionManagementUtility::getFileFieldTCAConfig('image', [ 'appearance' => [ 'createNewRelationLinkTitle' => 'LLL:EXT:frontend/Resources/Private/Language/locallang_ttc.xlf:images.addFileReference' ], // custom configuration for displaying fields in the overlay/reference table // to use the imageoverlayPalette instead of the basicoverlayPalette 'foreign_types' => [ // ... ] ], $GLOBALS['TYPO3_CONF_VARS']['GFX']['imagefile_ext']) ],
The API call is
The first argument is the name of the current field, the second argument is an override
configuration array, the third argument is the list of allowed file extensions and the
fourth argument is the list of disallowed file extensions. All arguments but the first
A call to
will generate a standard TCA configuration for an inline-type field,
with relation to the
sys_file table via the
table as "MM" table.
The override configuration array (the second argument) can be used to tweak
this default TCA definition. Any valid property from the
of inline-type fields can be used.
Additionally, there is an extra section for providing media sources, that come as three buttons per default.
Which ones should appear for the editor to use, can be configures using TCA appearance settings:
$GLOBALS['TCA']['pages']['columns']['media']['config']['appearance'] = [ 'fileUploadAllowed' => false, 'fileByUrlAllowed' => false, ];
This will suppress two buttons and only leave "Create new relation".
Such FAL-enabled fields can also be used inside FlexForms, but there's no API to generate the code in such a case.
On the database side, the corresponding field needs just store an integer, as is usual for relations field:
CREATE TABLE tt_content ( ... image int(11) unsigned DEFAULT '0' NOT NULL, ... );