def valuefrompostdata(self, postdata):
        """This parameter method searches the POST data and retrieves the values it needs. It does not set the value yet though, but simply returns it. Needs to be explicitly passed to parameter.set()"""
        if self.id in postdata and postdata[self.id] != '':
            return int(postdata[self.id])
        else:
            return None
This parameter method searches the POST data and retrieves the values it needs. It does not set the value yet though, but simply returns it. Needs to be explicitly passed to parameter.set()