Flex Form Field is inaccessible after the 13.4.2 update

[tgrigoryan234]

Describe the bug
After the minor update, the Flex Form fields are no longer accessible. It is empty.

To Reproduce
Steps to reproduce the behavior:

 fields:
  - identifier: my_flexform
    type: FlexForm
    fields:
      - type: Sheet
        identifier: sheet1
        label: Sheet 1
        fields:
          - identifier: section1
            type: Section
            label: Section 1
            container:
              - identifier: container1
                label: Container 1
                fields:
                  - identifier: container_field
                    type: Text
              - identifier: container2
                label: Container 2
                fields:
                  - identifier: container_field2
                    type: Textarea

Screenshots

TYPO3 Version
13.4.2

[nhovratov]

Did this work in v13.4.1 ? For me it doesn't work in both versions.

[tgrigoryan234]

it worked for me with 13.4.1.
Should I post bugs in Typo3 or have you already done so?

[nhovratov]

Hm, interesting. Yes, we need to file an issue on TYPO3 forge. If you could do this, I would much appreciate it. I already noticed my Core collegues that there are still issues with FlexForm.

[tgrigoryan234]

Issue created: https://forge.typo3.org/issues/105800

[nhovratov]

Thanks. But I'm still unsure how it worked for you before. Using exactly the same config results in an empty array for me.

[tgrigoryan234]

Ich habe in Configuration/TCA/Overrides/tt_content.php ein Flexform Feld aufgebaut. Und in den verschiedenen Contentblocks verwendet.
Vielleicht könntest du es so reproduzieren.

[nhovratov]

Yes, you most probably have a constellation, which Content Blocks doesn't create by itself. As a workaround, please add the FlexForm processor in your TypoScript: https://docs.typo3.org/m/typo3/reference-typoscript/main/en-us/DataProcessing/FlexFormProcessor.html

Example:

lib.contentBlock {
    dataProcessing {
        110 = flex-form
        110.fieldname = my_flexform
    }
}

This will make the FlexForm available as flexFormData and you can just replace it.

[tgrigoryan234]

Will it also work for backend previews or collection flex fields? I don't think so. For backend previews I have to develop one and also for collection flex fields, right?
I have created entire web pages of content, and now I have to be careful

[nhovratov]

Ok, in this case you could also implement an EventListener: https://docs.typo3.org/p/friendsoftypo3/content-blocks/main/en-us/DeveloperCorner/DataProcessing/Index.html

And then just call FlexFormService->convertFlexFormContentToArray on your FlexForm field.

Otherwise, please wait until this is fixed in Core.

[tgrigoryan234]

Even if I will also use Event Listner, the problem with Collections still exists. That's why I created a patch locally that works. I'll post it here.

typo3-cms-core-flex.patch

[nhovratov]

The Event Listener also works for Collection Records. But if the fix works for you, this is fine as an intermediate workaround.