Rasa: How to put the slots as mandatory.

Created on 21 May 2018 · 16Comments · Source: RasaHQ/rasa

Rasa Core version: 0.9.0a5
Issue:
Example: " I want to book a movie ticket."

Then Bot should ask to user that please provide the time & locations. Until the slots :- locations & time is not fill the Bot will repeat the question.

Source

DhruvMevada

All 16 comments

You can use Rasa's FormAction class to achieve this. Forms make it easier to define required fields and it handles most of the stuff for you. Relevant documentation with examples can be found here.

auzair92 on 22 May 2018

Rasa Core version: 0.9.0a5
Ya, I have tried that, but still not getting that. Please help me if I'm doing any mistake here.
Yaml file

intents:
  - greetings
  - booking
  - confirm
  - goodbye

entities:
- city
- destination_location
- source_location

slots:
  city:
    type: text
  source_location:
    type: text
  destination_location:
    type: text
  requested_slot:
    type: unfeaturized


templates:
  act_greet:
    - "Hi there!!"
    - "Greetings for the day"
    - "Hello, Have a good day"
    - "How can I help you"

  act_booking:
    - "booking a ride"
  act_confirm:
    - "Your travelling from {source_location}, {city} to {destination_location}, {city} on {travel_date} {travel_time} 
    Are you want to Book this ?"
  act_goodbye:
    - "Good Bye"
  act_cancel:
    - "you have cancel your booking!!"
  utter_ask_source_location:
    - "Please provide me source location"
  utter_ask_destination_location:
    - "please provide me destination location"
  utter_ask_city:
    - "in which city you currently living"

actions:
- act_greet
- act_confirm
- act_booking
- act_goodbye
- act_cancel
- actions.ActionBooking
#- bot.ActionSuggest

Stories.md file

## story_1
* greet
 - act_greet
* booking
 - action_booking
 - slot{"requested_slot": "source_location"}
 - slot{"requested_slot": "destination_location"}
 - slot{"requested_slot": "city"}

* bye
 - act_goodbye

custom action class of actions.py file

class RestaurantAPI(object):
   def search(self, info):
       return "papi’s pizza place"

class ActionBooking(FormAction):

   RANDOMIZE = False

   @staticmethod
   def required_fields():
       return [
           FreeTextFormField("destination_location", "destination_location"),
           FreeTextFormField("source_location", "source_location"),
           FreeTextFormField("city", "city")
       ]

   def name(self):
       return "action_booking"

   def run(self, dispatcher, tracker, domain):
       dispatcher.utter_message("looking for restaurants")
       restaurant_api = RestaurantAPI()
       restaurants = restaurant_api.search(tracker.get_slot("city"))
       return

output with debug command, Here the slots source & destination locations are filled, but the bot not asked regarding missing slot city.

DhruvMevada on 22 May 2018

@tmbo @auzair92
I think in our actions.py file we declared method which name is required_fields() as per the documents.
but it seems to that method is not executing while calling our action. So for checking purpose I have put logs in that required_fields() method but, that logs were not generating in our output, while we are run our bot.so, I think problem is in required_fields method.

if i am right can anyone please assist why it is not calling. or if i am wrong, assist me how to apply required slots in bot.

below are the custom action file that I put in our action.py file

class RestaurantAPI(object):
   def search(self, info):
       return "papi’s pizza place"

class ActionBooking(FormAction):

   RANDOMIZE = False

   @staticmethod
   def required_fields():
       logger.debug("---------------------------calling required field in action.py  file------------- ")
       return [
           EntityFormField("destination_location", "destination_location")
       ]

   def name(self):
       return "action_booking"

   def run(self, dispatcher, tracker, domain):
       dispatcher.utter_message("looking for restaurants")
       restaurant_api = RestaurantAPI()
       restaurants = restaurant_api.search(tracker.get_slot("city"))
       return

DhruvMevada on 22 May 2018

Here I'm attaching source file.Taxi bot.zip
Thanks in advance.

DhruvMevada on 23 May 2018

@DhruvMevada Two things:

you have to change name of 'run' method to 'submit'; this should solve the issue of slot filling not being implemented
your story is wrong; you can't set pass three values to requested_slot in one go. it will simply take the last passed value. it has to be done in three steps

booking
- action_booking
- slot{"requested_slot": "source_location"}
booking{"source_location":"mumbai"}
- action_booking
- slot{"source_location":"mumbai"}
- slot{"requested_slot": "destination_location"}
booking{"destination_location":"delhi"}
- action_booking
slot{"destination_location":"delhi"}
slot{"requested_slot": "city"}
booking{"city":"delhi"}
- action_booking
slot{"city":"delhi"}

santhosh-ceg on 23 May 2018

The suggested solution is a part of version 0.9 . It has not been released yet. How do I get it through 'pip' ?

memahesh on 24 May 2018

You can download the latest version from Github.

Unzip the folder..

Go to command line..

Change the current directory to the folder to which you unzipped

After that, Type this in the command line: python setup.py install

Thanks,
Santhosh.

Sent from my iPhone

On 24-May-2018, at 2:24 PM, Medam Mahesh notifications@github.com wrote:

The suggested solution is a part of version 0.9 . It has not been released yet. How do I get it through 'pip' ?

—
You are receiving this because you commented.
Reply to this email directly, view it on GitHub, or mute the thread.

santhosh-ceg on 24 May 2018

👍1

or pip install rasa_core==0.9.0a3

akelad on 24 May 2018

👍1

Great !!
It worked. Thanks guys.

memahesh on 24 May 2018

Hi @memahesh, I have a question. How come it worked for you.

@staticmethod
   def required_fields():
       return [
           FreeTextFormField("destination_location", "destination_location"),
           FreeTextFormField("source_location", "source_location"),
           FreeTextFormField("city", "city")
       ]

FreeTextFormField does not take 2 named entities, while you are passing 2 args.

In https://github.com/RasaHQ/rasa_core/blob/master/rasa_core/actions/forms.py

class FreeTextFormField(FormField):
    def __init__(self, slot_name):
        self.slot_name = slot_name

Do let me know how you were able to work with FreeTextFormField. Thanks.

RAJAT--PALIWAL on 30 May 2018

I haven't worked with _FreeTextFormField_ . I was using _EntityFormField_ and _BooleanFormField_ for my use case. Now that I look at the code in the question, it is written wrongly.

If you want to use the _FreeTextFormField_ , just give it the slot name you want to be filled. Whenever the value in _requested_slot_ is set to the slot name given in FreeTextFormField, the slot will be filled with the next user message.

memahesh on 31 May 2018

👍1

My issue is still unresolved , any hint or suggestion is appreciated. Thanks

DhruvMevada on 4 Jun 2018

While ActionBooking is taking object FormAction and there is no submit().

RAJAT--PALIWAL on 5 Jun 2018

@DhruvMevada you need to give more details as to what's not working now. Have you tried all the suggestions given in the thread here?

akelad on 6 Jun 2018

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.