Django app on Heroku will not return response to a statement

[engrphil]

I am using ChatterBot for a project and I have successfully deployed the modified Django app on Heroku. I had to install WhiteNoise and added it to the MIDDLEWARE_CLASSES. The app interface works fine on Heroku after fixing issue with css and static files but when I entered a message, chatterbot doesn't return any statement when I click on the button. I trained the bot and tested it okay locally before deploying. Any idea what I could be doing wrong? Thank you.

[vkosuri]

Did you tried this package https://github.com/vkosuri/chatterbot-live-example? If possible could you share stack trace of this error? Others can respond your question very easily.

[gunthercox]

@engrphil I haven't used Heroku in a while, but I recall that there was a way to view the error log for the application. Are there any exceptions listed in your error log?

[engrphil]

I just cloned the heroku example suggested by @vkosuri and it worked fine. Chatbot is responding however, the response doesn't correspond the question I am asking even though I have trained the bot on heroku many times with my corpus. The heroku logs show no error whatsoever. Why is the bot not responding accurately?

I am using Heroku free version for now (does that affect the database query?).

[gunthercox]

@engrphil I'm fairly certain that using the free tier of Heroku won't effect your database queries.

Is the app you just deployed an exact copy of @vkosuri's example? (If so I'll deploy my own copy to try to recreate the issue)

Also, what method did you use to train your bot running on Heroku? If the responses weren't accurate it may be an indication that training failed for some reason.

[engrphil]

@gunthercox I specified the path for the corpus data in settings.py and then run $ heroku run python manage.py train:

MacBook-Pro:chatterbot-live-example Phil$ heroku run python manage.py train ai.yml Training: [####################] 100% botprofile.yml Training: [####################] 100% computers.yml Training: [####################] 100% conversations.yml Training: [####################] 100% emotion.yml Training: [####################] 100% food.yml Training: [####################] 100% gossip.yml Training: [####################] 100% greetings.yml Training: [####################] 100% history.yml Training: [####################] 100% humor.yml Training: [####################] 100% literature.yml Training: [####################] 100% money.yml Training: [####################] 100% movies.yml Training: [####################] 100% onemtdataone.yml Training: [####################] 100% politics.yml Training: [####################] 100% psychology.yml Training: [####################] 100% science.yml Training: [####################] 100% sports.yml Training: [####################] 100% trivia.yml Training: [####################] 100%

Basically, I used the exact copy of @vkosuri since my customized version failed to talk to ChatterBot. The reason for that was the missing app.json in my own deployment. Maybe I should try train the bot locally before deploying to heroku.

[engrphil]

I just tried to train the bot locally before deploying to heroku. I got the following error of non-existing table:

File "/var/root/eb-virt/lib/python2.7/site-packages/django/db/backends/sqlite3/base.py", line 323, in execute return Database.Cursor.execute(self, query, params) django.db.utils.OperationalError: no such table: django_chatterbot_tag

@gunthercox you are right, that means the bot was never trained properly on heroku.

[engrphil]

$ python manage.py migrate --run-syncdb

solved the database error

[gunthercox]

Awesome! I'm glad to hear it was fixed.

[engrphil]

As a follow up. The app wasn't responding due no SQLite on heroku. To have app working on heroku, you will need the dj_database_url package to nicely use PostgreSQL DB on heroku since SQLite is not supported. You will modify your settings.py as follows:

import dj_database_url

db_from_env = dj_database_url.config()

DATABASES={'default': dj_database_url.config()}

[vkosuri]

Thanks, I have added your notes here https://github.com/vkosuri/chatterbot-live-example

[lock[bot]]

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