Convert actions to Enum

diffsync/diff.py

@@ -20,6 +20,7 @@
 
 from .exceptions import ObjectAlreadyExists
 from .utils import intersection, OrderedDefaultDict
+from .enum import DiffSyncActions
 
 
 class Diff:
@@ -105,9 +106,9 @@ def order_children_default(cls, children: Mapping) -> Iterator["DiffElement"]:
     def summary(self) -> Mapping[Text, int]:
         """Build a dict summary of this Diff and its child DiffElements."""
         summary = {
-            "create": 0,
-            "update": 0,
-            "delete": 0,
+            DiffSyncActions.CREATE: 0,
+            DiffSyncActions.UPDATE: 0,
+            DiffSyncActions.DELETE: 0,
             "no-change": 0,
         }
         for child in self.get_children():
@@ -224,18 +225,18 @@ def action(self) -> Optional[Text]:
         """Action, if any, that should be taken to remediate the diffs described by this element.
 
         Returns:
-            str: "create", "update", "delete", or None
+            str: DiffSyncActions ("create", "update", "delete", or None)
         """
         if self.source_attrs is not None and self.dest_attrs is None:
-            return "create"
+            return DiffSyncActions.CREATE
         if self.source_attrs is None and self.dest_attrs is not None:
-            return "delete"
+            return DiffSyncActions.DELETE
         if (
             self.source_attrs is not None
             and self.dest_attrs is not None
             and any(self.source_attrs[attr_key] != self.dest_attrs[attr_key] for attr_key in self.get_attrs_keys())
         ):
-            return "update"
+            return DiffSyncActions.UPDATE
 
         return None
 
@@ -328,9 +329,9 @@ def has_diffs(self, include_children: bool = True) -> bool:
     def summary(self) -> Mapping[Text, int]:
         """Build a summary of this DiffElement and its children."""
         summary = {
-            "create": 0,
-            "update": 0,
-            "delete": 0,
+            DiffSyncActions.CREATE: 0,
+            DiffSyncActions.UPDATE: 0,
+            DiffSyncActions.DELETE: 0,
             "no-change": 0,
         }
         if self.action:

diffsync/enum.py

@@ -73,3 +73,12 @@ class DiffSyncStatus(enum.Enum):
     SUCCESS = "success"
     FAILURE = "failure"
     ERROR = "error"
+
+
+class DiffSyncActions:  # pylint: disable=too-few-public-methods
+    """List of valid Action for DiffSyncModel."""
+
+    CREATE = "create"
+    UPDATE = "update"
+    DELETE = "delete"
+    NO_CHANGE = None

diffsync/helpers.py

@@ -20,7 +20,7 @@
 import structlog  # type: ignore
 
 from .diff import Diff, DiffElement
-from .enum import DiffSyncModelFlags, DiffSyncFlags, DiffSyncStatus
+from .enum import DiffSyncModelFlags, DiffSyncFlags, DiffSyncStatus, DiffSyncActions
 from .exceptions import ObjectNotFound, ObjectNotCreated, ObjectNotUpdated, ObjectNotDeleted, ObjectCrudException
 from .utils import intersection, symmetric_difference
 
@@ -353,11 +353,11 @@ def sync_diff_element(self, element: DiffElement, parent_model: "DiffSyncModel"
             self.logger.warning("No object resulted from sync, will not process child objects.")
             return changed
 
-        if self.action == "create":
+        if self.action == DiffSyncActions.CREATE:
             if parent_model:
                 parent_model.add_child(model)
             self.dst_diffsync.add(model)
-        elif self.action == "delete":
+        elif self.action == DiffSyncActions.DELETE:
             if parent_model:
                 parent_model.remove_child(model)
             if model.model_flags & DiffSyncModelFlags.SKIP_CHILDREN_ON_DELETE:
@@ -391,15 +391,15 @@ def sync_model(
 
         try:
             self.logger.debug(f"Attempting model {self.action}")
-            if self.action == "create":
+            if self.action == DiffSyncActions.CREATE:
                 if model is not None:
                     raise ObjectNotCreated(f"Failed to create {self.model_class.get_type()} {ids} - it already exists!")
                 model = self.model_class.create(diffsync=self.dst_diffsync, ids=ids, attrs=attrs)
-            elif self.action == "update":
+            elif self.action == DiffSyncActions.UPDATE:
                 if model is None:
                     raise ObjectNotUpdated(f"Failed to update {self.model_class.get_type()} {ids} - not found!")
                 model = model.update(attrs=attrs)
-            elif self.action == "delete":
+            elif self.action == DiffSyncActions.DELETE:
                 if model is None:
                     raise ObjectNotDeleted(f"Failed to delete {self.model_class.get_type()} {ids} - not found!")
                 model = model.delete()