Could any body tell me why the validation form methods don't be called automatically(don't work at all)?

[ChrisRahme (Chris Rahmé)]

@sun

{'config': {'store_entities_as_slots': True}, 'session_config': {'session_expiration_time': 60, 'carry_over_slots_to_new_session': True}, 'intents': [{'country_pop_cap_query': {'use_entities': True}}, {'greet': {'use_entities': True}}, {'bot_challenge': {'use_entities': True}}, {'goodbye': {'use_entities': True}}, {'thank': {'use_entities': True}}], 'entities': ['country', 'pop_cap'], 'slots': {'pop_cap': {'type': 'rasa.shared.core.slots.CategoricalSlot', 'initial_value': None, 'influence_conversation': False, 'mappings': [{'type': 'from_entity', 'entity': 'pop_cap'}], 'values': ['capital', 'population']}, 'country': {'type': 'rasa.shared.core.slots.TextSlot', 'initial_value': None, 'influence_conversation': False, 'mappings': [{'type': 'from_entity', 'entity': 'country'}]}}, 'responses': {'utter_greet': [{'text': 'Hey! How are you?'}, {'text': 'hey dude, how are you doing'}, {'text': "you, what's up"}, {'text': 'Hi there, How is your day going?'}, {'text': 'how day bro'}, {'text': 'hello buddy, how you doing'}, {'text': 'Welcome. How is your day going?'}], 'utter_thank': [{'text': 'you are welcome bro'}, {'text': 'always happy to help'}, {'text': 'with pleasure dude'}, {'text': "it's my pleasure"}], 'utter_goodbye': [{'text': 'Bye, see you'}, {'text': 'bye bye :)'}, {'text': 'have a nice day'}, {'text': 'see you around'}, {'text': 'have a great day dude'}, {'text': 'have a good day bro'}, {'text': 'all the best buddy'}, {'text': 'see you'}], 'utter_iamabot': [{'text': 'I am a bot, how did you guess that :)'}, {'text': 'I am a bot, powered by Rasa.'}, {'text': 'your guess is correct, I am a bot :)'}, {'text': "you are so clever to guess that, yes i'm a bot :)"}, {'text': "dude i was tring to hide that, ya i'm a bot"}, {'text': "that what i was tring to not let you reveal, ya i'm a bot"}], 'utter_offer': [{'text': 'I can give you information about the capital and population of some countries if you like'}, {'text': 'I have information about the capital and number of population of some countries'}, {'text': 'if you interested to know about the population or the capital of countries, i can help you '}, {'text': 'By the way, i offer information about the capital and the population of countries'}, {'text': 'i will provide you with the capital and population if you ask me'}, {'text': 'please feel free to ask me about the capital and population of countries'}, {'text': 'if you interested in knowing the population or the capital of counties, i will help you'}, {'text': 'the population and the capital of countries is my game'}], 'utter_ask_country': [{'text': 'Which country do you want to know about please?'}, {'text': 'Please determine which country you intent'}, {'text': 'which country do you interested in?'}, {'text': 'which country do you care about?'}, {'text': 'select a country please?'}], 'utter_ask_pop_cap': [{'text': 'Do you want to know about the Population or the Capital of {country}?'}, {'text': 'Are you interested in knowing the Population or the Capital  of {country}?'}, {'text': 'do you intented in the Capital or the Population?'}, {'text': 'are you care about the Capital or the Population?'}], 'utter_server_failure': [{'text': "i'm so sorry, but we are facing server problem now, could you try later please?"}, {'text': 'so sorry, could you try later please? there are some issues '}, {'text': "i'm sorry, perhaps a connection problem happened"}, {'text': 'The server encountered an internal error and cannot complete your request.'}], 'utter_not_found': [{'text': "I'm so sorry, but {country} is not included in our database?"}, {'text': "Sorry, i don't know about {country}, select another one please?"}, {'text': 'Unfortunately, i know nothing about {country}, could you determine another country pls?'}, {'text': "hmm, i appologize i don't know much about that country, select another one please"}, {'text': "i don't know about this country dude, sorry!"}], 'utter_answer_cap': [{'text': 'The capital city of {country} is {cap}'}, {'text': '{cap} is the capital city of {country}'}], 'utter_answer_pop': [{'text': '{country} has a population of about {pop} '}, {'text': 'Population of {country} is about {pop}'}], 'utter_typo': [{'text': "Sorry, i didn't get you Please could you spell your input correctly?"}, {'text': "i didn't understand, Please could you spell your message accurately?"}, {'text': 'could you rewrite your choice correctly please'}, {'text': "i'm affraid i didn't understand, Please could you spell your input correctly?"}, {'text': 'it seems that you write some words wrongly'}, {'text': 'Please could you spell it correctly?'}, {'text': 'Sorry, I’m afraid I don’t follow you.'}, {'text': 'Excuse me, could you rewrite your words correctly please?'}, {'text': 'I’m sorry, I don’t understand. Could you write it correctly please?'}]}, 'actions': ['utter_greet', 'utter_offer', 'utter_iamabot', 'utter_thank', 'utter_goodbye', 'utter_ask_country', 'utter_ask_pop_cap', 'utter_not_found', 'utter_server_failure', 'utter_answer_cap', 'utter_answer_pop', 'utter_typo', 'validate_country_pop_cap_form', 'action_answer'], 'forms': {'country_pop_cap_form': {'required_slots': ['country', 'pop_cap']}}, 'e2e_actions': []}

This is what is being printed as slot_value.

And the reason is immediately clear.

This is your domain file.

@sun

    def validate_country(self, dispatcher: CollectingDispatcher, tracker: Tracker,
                         domain: DomainDict, slot_value: Any) -> Dict[Text, Any]:

Here, you didn’t use the correct order in the arguments. Look at the docs.

It should be

def validate_country(self, slot_value, dispatcher, tracker, domain):

With your code, dispatcher is actually slot_value, tracker is actually dispatcher, domain is actually tracker, and slot_value is actually domain.

Please use the arguments in the correct order. It’s the order that is important, not the name.