Add possibility to split the domain into separate files

changelog/6132.feature.rst

@@ -0,0 +1 @@
+Add possibility to split the domain into separate files. Domain file now doesn't have to be called `domain.yaml` anymore.

rasa/core/domain.py

@@ -7,7 +7,10 @@
 from pathlib import Path
 from typing import Any, Dict, List, NamedTuple, Optional, Set, Text, Tuple, Union
 
+from ruamel.yaml import YAMLError
+
 import rasa.core.constants
+from rasa.data import YAML_FILE_EXTENSIONS
 from rasa.utils.common import (
     raise_warning,
     lazy_property,
@@ -47,6 +50,23 @@
 USE_ENTITIES_KEY = "use_entities"
 IGNORE_ENTITIES_KEY = "ignore_entities"
 
+KEY_SLOTS = "slots"
+KEY_INTENTS = "intents"
+KEY_ENTITIES = "entities"
+KEY_RESPONSES = "responses"
+KEY_ACTIONS = "actions"
+KEY_FORMS = "forms"
+
+ALL_DOMAIN_KEYS = [
+    KEY_SLOTS,
+    KEY_FORMS,
+    KEY_ACTIONS,
+    KEY_ENTITIES,
+    KEY_INTENTS,
+    KEY_RESPONSES,
+]
+
+
 if typing.TYPE_CHECKING:
     from rasa.core.trackers import DialogueStateTracker
 
@@ -133,8 +153,9 @@ def from_yaml(cls, yaml: Text) -> "Domain":
         return cls.from_dict(data)
 
     @classmethod
-    def from_dict(cls, data: Dict) -> "Domain":
-        utter_templates = cls.collect_templates(data.get("responses", {}))
+    def from_dict(cls, data: Dict) -> Optional["Domain"]:
+
+        utter_templates = cls.collect_templates(data.get(KEY_RESPONSES, {}))
         if "templates" in data:
             raise_warning(
                 "Your domain file contains the key: 'templates'. This has been "
@@ -146,18 +167,18 @@ def from_dict(cls, data: Dict) -> "Domain":
             )
             utter_templates = cls.collect_templates(data.get("templates", {}))
 
-        slots = cls.collect_slots(data.get("slots", {}))
+        slots = cls.collect_slots(data.get(KEY_SLOTS, {}))
         additional_arguments = data.get("config", {})
         session_config = cls._get_session_config(data.get(SESSION_CONFIG_KEY, {}))
-        intents = data.get("intents", {})
+        intents = data.get(KEY_INTENTS, {})
 
         return cls(
             intents,
-            data.get("entities", []),
+            data.get(KEY_ENTITIES, []),
             slots,
             utter_templates,
-            data.get("actions", []),
-            data.get("forms", []),
+            data.get(KEY_ACTIONS, []),
+            data.get(KEY_FORMS, []),
             session_config=session_config,
             **additional_arguments,
         )
@@ -187,13 +208,12 @@ def _get_session_config(session_config: Dict) -> SessionConfig:
     @classmethod
     def from_directory(cls, path: Text) -> "Domain":
         """Loads and merges multiple domain files recursively from a directory tree."""
-        from rasa import data
 
         domain = Domain.empty()
         for root, _, files in os.walk(path, followlinks=True):
             for file in files:
                 full_path = os.path.join(root, file)
-                if data.is_domain_file(full_path):
+                if Domain.is_domain_file(full_path):
                     other = Domain.from_file(full_path)
                     domain = other.merge(domain)
 
@@ -236,20 +256,20 @@ def merge_lists(l1: List[Any], l2: List[Any]) -> List[Any]:
             combined[SESSION_CONFIG_KEY] = domain_dict[SESSION_CONFIG_KEY]
 
         # intents is list of dicts
-        intents_1 = {list(i.keys())[0]: i for i in combined["intents"]}
-        intents_2 = {list(i.keys())[0]: i for i in domain_dict["intents"]}
+        intents_1 = {list(i.keys())[0]: i for i in combined[KEY_INTENTS]}
+        intents_2 = {list(i.keys())[0]: i for i in domain_dict[KEY_INTENTS]}
         merged_intents = merge_dicts(intents_1, intents_2, override)
-        combined["intents"] = list(merged_intents.values())
+        combined[KEY_INTENTS] = list(merged_intents.values())
 
         # remove existing forms from new actions
-        for form in combined["forms"]:
-            if form in domain_dict["actions"]:
-                domain_dict["actions"].remove(form)
+        for form in combined[KEY_FORMS]:
+            if form in domain_dict[KEY_ACTIONS]:
+                domain_dict[KEY_ACTIONS].remove(form)
 
-        for key in ["entities", "actions", "forms"]:
+        for key in [KEY_ENTITIES, KEY_ACTIONS, KEY_FORMS]:
             combined[key] = merge_lists(combined[key], domain_dict[key])
 
-        for key in ["responses", "slots"]:
+        for key in [KEY_RESPONSES, KEY_SLOTS]:
             combined[key] = merge_dicts(combined[key], domain_dict[key], override)
 
         return self.__class__.from_dict(combined)
@@ -431,8 +451,8 @@ def __init__(
     def __hash__(self) -> int:
 
         self_as_dict = self.as_dict()
-        self_as_dict["intents"] = sort_list_of_dicts_by_first_key(
-            self_as_dict["intents"]
+        self_as_dict[KEY_INTENTS] = sort_list_of_dicts_by_first_key(
+            self_as_dict[KEY_INTENTS]
         )
         self_as_string = json.dumps(self_as_dict, sort_keys=True)
         text_hash = utils.get_text_hash(self_as_string)
@@ -774,12 +794,12 @@ def as_dict(self) -> Dict[Text, Any]:
                 SESSION_EXPIRATION_TIME_KEY: self.session_config.session_expiration_time,
                 CARRY_OVER_SLOTS_KEY: self.session_config.carry_over_slots,
             },
-            "intents": self._transform_intents_for_file(),
-            "entities": self.entities,
-            "slots": self._slot_definitions(),
-            "responses": self.templates,
-            "actions": self.user_actions,  # class names of the actions
-            "forms": self.form_names,
+            KEY_INTENTS: self._transform_intents_for_file(),
+            KEY_ENTITIES: self.entities,
+            KEY_SLOTS: self._slot_definitions(),
+            KEY_RESPONSES: self.templates,
+            KEY_ACTIONS: self.user_actions,  # class names of the actions
+            KEY_FORMS: self.form_names,
         }
 
     def persist(self, filename: Union[Text, Path]) -> None:
@@ -827,16 +847,16 @@ def cleaned_domain(self) -> Dict[Text, Any]:
         """
         domain_data = self.as_dict()
 
-        for idx, intent_info in enumerate(domain_data["intents"]):
+        for idx, intent_info in enumerate(domain_data[KEY_INTENTS]):
             for name, intent in intent_info.items():
                 if intent.get(USE_ENTITIES_KEY) is True:
                     del intent[USE_ENTITIES_KEY]
                 if not intent.get(IGNORE_ENTITIES_KEY):
                     intent.pop(IGNORE_ENTITIES_KEY, None)
                 if len(intent) == 0:
-                    domain_data["intents"][idx] = name
+                    domain_data[KEY_INTENTS][idx] = name
 
-        for slot in domain_data["slots"].values():  # pytype: disable=attribute-error
+        for slot in domain_data[KEY_SLOTS].values():  # pytype: disable=attribute-error
             if slot["initial_value"] is None:
                 del slot["initial_value"]
             if slot["auto_fill"]:
@@ -1040,9 +1060,9 @@ def get_duplicate_exception_message(
             raise InvalidDomain(
                 get_exception_message(
                     [
-                        (duplicate_actions, "actions"),
-                        (duplicate_slots, "slots"),
-                        (duplicate_entities, "entities"),
+                        (duplicate_actions, KEY_ACTIONS),
+                        (duplicate_slots, KEY_SLOTS),
+                        (duplicate_entities, KEY_ENTITIES),
                     ],
                     incorrect_mappings,
                 )
@@ -1074,6 +1094,25 @@ def is_empty(self) -> bool:
 
         return self.as_dict() == Domain.empty().as_dict()
 
+    @staticmethod
+    def is_domain_file(filename: Text) -> bool:
+        """Checks whether the given file path is a Rasa domain file.
+
+        Args:
+            filename: Path of the file which should be checked.
+
+        Returns:
+            `True` if it's a domain file, otherwise `False`.
+        """
+        if not Path(filename).suffix in YAML_FILE_EXTENSIONS:
+            return False
+        try:
+            content = rasa.utils.io.read_yaml_file(filename)
+            if any(key in content for key in ALL_DOMAIN_KEYS):
+                return True
+        except YAMLError:
+            pass
+
 
 class TemplateDomain(Domain):
     pass

tests/core/test_domain.py

@@ -448,13 +448,6 @@ def test_load_domain_from_directory_tree(tmpdir_factory: TempdirFactory):
     # Check if loading from `.yaml` also works
     utils.dump_obj_as_yaml_to_file(subsubdirectory / "domain.yaml", skill_2_1_domain)
 
-    subsubdirectory_2 = subdirectory_2 / "Skill 2-2"
-    subsubdirectory_2.mkdir()
-    excluded_domain = {"actions": ["should not be loaded"]}
-    utils.dump_obj_as_yaml_to_file(
-        subsubdirectory_2 / "other_name.yaml", excluded_domain
-    )
-
     actual = Domain.load(str(root))
     expected = [
         "utter_root",