def _assert_two_stage_fallback_policy_is_migratable(config: Dict) -> None:
two_stage_fallback_config = next(
(policy_config for policy_config in config.get("policies", [])
if policy_config.get("name") == TwoStageFallbackPolicy.__name__),
None,
)
if not two_stage_fallback_config:
return
if (two_stage_fallback_config.get("deny_suggestion_intent_name",
USER_INTENT_OUT_OF_SCOPE) !=
USER_INTENT_OUT_OF_SCOPE):
rasa.shared.utils.cli.print_error_and_exit(
f"The TwoStageFallback in Rasa Open Source 2.0 has to use the intent "
f"'{USER_INTENT_OUT_OF_SCOPE}' to recognize when users deny suggestions. "
f"Please change the parameter 'deny_suggestion_intent_name' to "
f"'{USER_INTENT_OUT_OF_SCOPE}' before migrating the model configuration. "
)
if (two_stage_fallback_config.get("fallback_nlu_action_name",
ACTION_DEFAULT_FALLBACK_NAME) !=
ACTION_DEFAULT_FALLBACK_NAME):
rasa.shared.utils.cli.print_error_and_exit(
f"The Two-Stage Fallback in Rasa Open Source 2.0 has to use the action "
f"'{ACTION_DEFAULT_FALLBACK_NAME}' for cases when the user denies the "
f"suggestion multiple times. "
f"Please change the parameter 'fallback_nlu_action_name' to "
f"'{ACTION_DEFAULT_FALLBACK_NAME}' before migrating the model "
f"configuration. ")
def _assert_nlu_pipeline_given(config: Dict, policy_names: List[Text]) -> None:
if not config.get("pipeline") and any(
policy in policy_names for policy in
[FallbackPolicy.__name__, TwoStageFallbackPolicy.__name__]):
rasa.shared.utils.cli.print_error_and_exit(
"The model configuration has to include an NLU pipeline. This is required "
"in order to migrate the fallback policies.")
def _assert_nlu_pipeline_given(config: Dict, policy_names: List[Text]) -> None:
if not config.get("pipeline") and any(
policy in policy_names for policy in
[POLICY_NAME_FALLBACK, POLICY_NAME_TWO_STAGE_FALLBACK]):
rasa.shared.utils.cli.print_error_and_exit(
"The model configuration has to include an NLU pipeline. This is required "
"in order to migrate the fallback policies.")
def _get_configuration(path: Path) -> Dict:
config = {}
try:
config = rasa.shared.utils.io.read_config_file(path)
except Exception:
rasa.shared.utils.cli.print_error_and_exit(
f"'{path}' is not a path to a valid model configuration. "
f"Please provide a valid path.")
policy_names = [p.get("name") for p in config.get("policies", [])]
_assert_config_needs_migration(policy_names)
_assert_nlu_pipeline_given(config, policy_names)
_assert_two_stage_fallback_policy_is_migratable(config)
_assert_only_one_fallback_policy_present(policy_names)
if FormPolicy.__name__ in policy_names:
_warn_about_manual_forms_migration()
return config