Support "multiple" attribute
Using the multiple attribute for the input leads to an exception:
Core: Exception handler (WEB): Uncaught TYPO3 Exception: Call to a member function _isNew() on null | Error thrown in file /.../typo3_src-7.6.16/typo3/sysext/extbase/Classes/Persistence/Generic/Backend.php in line 484.
On TYPO3 7.6.16
Thanks for your report
The multiple attribute is not yet supported by this example
There is an error in the TYPO3\CMS\Extbase\Property\PropertyMapper too, because it tries to map the file-array, that has multiple items.
as I said multiple is not supported by this example ^^
Bumping this one... Support for and understanding of uploading multiple files at once to an imageCollection instance would be awesome. I can't figure it out myself...