collections

How can input field access the each row of the item in the collection

Hi,I really meet a problem ,I create a collection with several items,I can access the item's value in the collection,but how can I get the item's value of each row outside the collection?

Hit:when I mean like,in the "expenses report" of "create expense report" form,how to get to the total cost

Does anyone has solution about this?
Thanks in advance!
I am really in a hurry,I appreciate it if anyone can give me some suggestions.

Access parent info in a nested collection

Hi, Im using Bonita 7.3.3

In a form, I put a three nested collection container, similar this example:
http://documentation.bonitasoft.com/?page=repeat-a-container-for-a-colle...

All is OK, but I need fromn the child collection acces to the parent item info, because I load a selector in the child container with the result of another selector at parent container. Using AngularJS, it is easy using $parent.$index, but seems that it is not working for Bonita.

Thanks

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