Don't need parent. Just use the whole path for the group id

src/spiffworkflow_backend/api.yml

@@ -1620,8 +1620,6 @@ components:
           type: string
         name:
           type: string
-        parent:
-          type: string
         display_name:
           type: string
         display_order:

src/spiffworkflow_backend/models/process_group.py

@@ -20,7 +20,6 @@ class ProcessGroup:
 
     id: str  # A unique string name, lower case, under scores (ie, 'my_group')
     display_name: str
-    parent: str = ''
     display_order: int | None = 0
     admin: bool | None = False
     process_models: list[ProcessModelInfo] = field(
@@ -47,7 +46,7 @@ class ProcessGroupSchema(Schema):
         """Meta."""
 
         model = ProcessGroup
-        fields = ["id", "display_name", "display_order", "admin", "process_models", "parent"]
+        fields = ["id", "display_name", "display_order", "admin", "process_models"]
 
     process_models = marshmallow.fields.List(
         marshmallow.fields.Nested(

src/spiffworkflow_backend/services/file_system_service.py

@@ -32,9 +32,9 @@ class FileSystemService:
         return os.path.join(app_root, "..", dir_name)
 
     @staticmethod
-    def process_group_path(name: str, parent: str) -> str:
+    def process_group_path(name: str) -> str:
         """Category_path."""
-        return os.path.join(FileSystemService.root_path(), parent, name)
+        return os.path.join(FileSystemService.root_path(), name)
 
     @staticmethod
     def full_path_from_relative_path(relative_path: str) -> str:

src/spiffworkflow_backend/services/process_model_service.py

@@ -189,7 +189,7 @@ class ProcessModelService(FileSystemService):
 
     def update_process_group(self, process_group: ProcessGroup) -> ProcessGroup:
         """Update_process_group."""
-        cat_path = self.process_group_path(process_group.id, process_group.parent)
+        cat_path = self.process_group_path(process_group.id)
         os.makedirs(cat_path, exist_ok=True)
         json_path = os.path.join(cat_path, self.CAT_JSON_FILE)
         with open(json_path, "w") as cat_json:

tests/spiffworkflow_backend/integration/test_nested_groups.py

@@ -54,11 +54,10 @@ class TestNestedGroups(BaseTest):
         )
 
         process_group_b = ProcessGroup(
-            id="group_b",
+            id="group_a/group_b",
             display_name="Group B",
             display_order=0,
             admin=False,
-            parent='group_a'
         )
         response_b = client.post(
             "/v1.0/process-groups",
@@ -68,11 +67,10 @@ class TestNestedGroups(BaseTest):
         )
 
         process_group_c = ProcessGroup(
-            id="group_c",
+            id="group_a/group_b/group_c",
             display_name="Group C",
             display_order=0,
             admin=False,
-            parent='group_a/group_b'
         )
         response_c = client.post(
             "/v1.0/process-groups",
@@ -104,11 +102,10 @@ class TestNestedGroups(BaseTest):
         )
 
         process_group_b = ProcessGroup(
-            id="group_b",
+            id="group_a/group_b",
             display_name="Group B",
             display_order=0,
             admin=False,
-            parent='group_a'
         )
         response_b = client.post(
             "/v1.0/process-groups",