TYPO3 Core

For fields like tt_content.image that contain a comma-separated list of file names. When migrating to FAL, this is converted to entries in the sys_file_references table. As these relations are using the regular TYPO3 relation mechanism provided by TCEmain, the field itself (e.g. tt_content.image) should contain the number of related records. This part is currently missing in the migration wizard for FAL.

Another problem is that the field is still a varchar/text field, because the database cannot be updated before migrating (as all data would be lost then). We could do this update after the migration, but this will require some changes to the database update tool (it has to support alternative database definitions).