DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.sqlite3',
        'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
    },
    'chatbot_db': {
        'ENGINE': 'django.db.backends.sqlite3',
        'NAME': os.path.join(BASE_DIR, 'chatbot.sqlite3'),
    }
}


DATABASE_ROUTERS = [
    'myapp.chatbot_router.ChatbotRouter'
]

class ChatbotRouter:
    def db_for_read(self, model, **hints):
        if model._meta.app_label == 'django_chatterbot':
            return "chatbot_db"
        return None

    def db_for_write(self, model, **hints):
        if model._meta.app_label == 'django_chatterbot':
            return "chatbot_db"
        return None

    def allow_migrate(self, db, app_label, model_name=None, **hints):
        if app_label == 'django_chatterbot':
            return "chatbot_db "
        return None

    def allow_relation(self, obj1, obj2, **hints):
        """
        Allow relations if a model in the auth app is involved.
        """
        if obj1._meta.app_label == 'django_chatterbot' or \
                obj2._meta.app_label == 'django_chatterbot':
            return True
        return None