Important: #102130 - Optimizing T3D Import/Export module¶
See forge#102130
Description¶
The Import/Export backend module is based on code that is
very hard to maintain, and is tightly coupled with both
the DataHandler and RefIndex routines.
To improve maintainability and reliability in these areas, parts of the Import/Export module need to be refactored as an ongoing effort.
The documentation of the Import/Export module now addresses these challenges.
The ongoing refactoring may affect importing dumps from
older versions of TYPO3. Importing these dumps may lead
to missing data, also due to changes made
longer ago (i.e. the pages_language_overlay table no longer
exists, changes in workspaces, ...).
When performing an import of outdated TYPO3 versions, thoroughly check the generated warnings and errors, so that you can either recreate or upload missing data manually.