Multistep form goto previous step: DateTime convert error

[anianweber]

Reproduction

• Create a Multistep Form where the first step contains a DatePicker
• Fill the Value of the DatePicker, go to Step 2, and then go back to Step 1
• An error gehts thrown:
  Could not convert target type "DateTime": No converter found which can be used to convert from "__PHP_Incomplete_Class" or "object" to "DateTime".

Possible solutions

• The error definitely has something to do with Neos.Form/Classes/ViewHelpers/Form/DatePickerViewHelper.php and the getSelectedDate method (or the convert happening inside this method [Line 118])
• Unfortunately it isn't completely clear to me why this error is thrown in the first place. A possible workaround would be to json_encode and json_decode the $date and then pass it to the convert.

// possible workaround in Neos.Form/Classes/ViewHelpers/Form/DatePickerViewHelper.php:118
$dateObject = json_decode(json_encode($date), true);
$date = $this->propertyMapper->convert($dateObject, 'DateTime');

Environment
neos/form: 5.2.0
neos/neos: 5.3.0
neos/flow: 6.3.0
php: 7.3

[sorenmalling]

Can you confirm or deny if it's the issue described in this ticket #126

[anianweber]

Yes, this is exactly the same issue.
Tanks for the fast response. This issue can be closed then.
Is there a plan when the next release will occur?
Or is the release 5.2.0 a false release? Should i instead downgrade to 5.1.2. This seems to be a newer release than 5.2.0.

[bwaidelich]

Or is the release 5.2.0 a false release?

Good question. @daniellienert and @Sebobo you tagged the last releases, do you know more?

[Sebobo]

I still have to do the release was too busy yesterday

[anianweber]

Tanks for the release! @Sebobo