RASA FormAction ActionExecutionRejection不会重新提示缺少插槽

时间:2019-03-04 11:47:31

标签: rasa-nlu rasa-core

我正在尝试在此处实施FormAction,但是我已经覆盖了validate方法。

以下是同一代码:

def validate(self, dispatcher, tracker, domain):
      logger.info("Validate of single entity called")
      document_number = tracker.get_slot("document_number")
      # Run regex on latest_message
      extracted = re.findall(regexp, tracker.latest_message['text'])
      document_array = []
      for e in extracted:
          document_array.append(e[0])
      # generate set for needed things and
      document_set = set(document_array)
      document_array = list(document_set)
      logger.info(document_set)
      if len(document_set) > 0:
          if document_number and len(document_number):
              document_array = list(set(document_array + document_number))
          return [SlotSet("document_number", document_array)]
      else:
          if document_number and len(document_number):
              document_array = list(set(document_array + document_number))
              return [SlotSet("document_number", document_array)]
          else:
              # Here it doesn't have previously set slot
              # So Raise an error
              raise ActionExecutionRejection(self.name(), 
                                             "Please provide document number")

因此,理想情况下,根据文档,当ActionExecutionRejection发生时,它应该说出一个名称为utter_ask_ {slotname}的模板,但不会触发该动作。

这是我的domain.yml模板

templates:
  utter_greet:
    - text: "Hi, hope you are having a good day! How can I help?"
  utter_ask_document_number:
    - text: "Please provide document number"
  utter_help:
    - text: "To find the document, please say the ID of a single document or multiple documents"
  utter_goodbye:
    - text: "Talk to you later!"
  utter_thanks:
    - text: "My pleasure."

1 个答案:

答案 0 :(得分:1)

默认情况下,ActionExecutionRejection不会发出名称为utter_ask_{slotname}的模板,而是保留表单逻辑以允许其他策略(例如FallbackPolicy)采取措施。 utter_ask_{slotname}是快乐路径的默认值,在该路径中,它第一次尝试获取所需的插槽。动作拒绝的默认实现是为了处理某些不愉快的路径,例如用户是否决定通过拒绝退出流程或通过聊天绕道等。

如果您想使用发声来实现模板以重新询问所需的插槽,则可以将ActionExecutionRejection替换为dispatcher.utter_template(<desired template name>, tracker)。但是,如果没有验证,这将使您无法退出表单操作-我不知道您的意图是什么,但是也许您还希望基于意图合并一些逻辑(即,如果类似“拒绝” ,让ActionExecutionRejection发生,以便它可以退出,这是一种“输入数据”类型的意图,请确保再次询问。)