[web2py] Custom Form Action empty

[miroslavgojic]

in controller I have next line for form

form = crud.create(db.name,next=URL('index'),message=T("some text"))

 in view I have

    {{=form.custom.begin}}
    {{=DIV(DIV('Name:',
_id='two'),DIV(form.custom.widget.fieldname,_id='three'),DIV(form.custom.submit,_id='for'),_id='one')}}
    {{=form.custom.end}}

this code produce

<form  action="" enctype="multipart/form-data" method="post"> ....

is is possible to put some value in action and how