Method to generate item from a ItemForm. The form must be exposed on form attribute
        @param command: a command tha expose data through form attributte

def handle_previous(self, command):
        """
        Method to generate item from a ItemForm. The form must be exposed on form attribute
        @param command: a command tha expose data through form attributte
        """
        self.result = command.items
        self._to_commit = self.result