[Flow] Use TYPO3 Form API for domain model add and update

[Rocky]

Hi,

I am thinking of using TYPO3 Form API (http://flow.typo3.org/documentation/guides/forms) to create forms for adding and updating  TYPO3 Flow domain models.

I followed the guide to made the form. But do not know how to:
      1, Change rendered form's action attribute. The Form API used the controller action's uri in whose template <form:render factoryClass="my\package\formfactory" /> is used.
      2, Eleminate leading "--" in each fields name attribute. Now the name attributes has values such as name="--product[__currentPage]"

Any advice please?