Child Model Object looses Connection on Form saving.

[neos-bot]

Jira issue originally created by user kaystrobach:

Imagine the following model:

  parent
    ...
    child
      attributeOfChild
      ...

Additionally we assume, that the attribute of the child is an float value, which needs to be converted for output in a form, so we have a form like this:

<f:form action="update" object="{parent}" objectName="parent">
  <f:form.textfield property="child.attributeOfChild" value="{parent.child.attributeOfChild -> f:format.number(decimals:1, decimalSeparator:',', thousandsSeparator:'.')}"/>
  ... save button etc.
</form>

having just VH.fields of parent.child, which properties are set using value, the hidden**identity form field of child is not added to the form. So saving the form, will cause FLOW to insert a new child into parent with the new values instead of changing the existing child ...

Jira-URL: https://jira.neos.io/browse/FLOW-62

[neos-bot]

Comment created by @albe:

Could actually be a duplicate, but this one is more generic.