Add branch version demo

Author: kgalliher

talks/DevTechSummit2026/.gitkeep

@@ -0,0 +1,95 @@
+"""
+Use the VersionManager - differences method to find edits made between now and a given time.
+Transfer those changes from one set of feature layers to another.
+
+Scenario:
+An on-premise server contains a parcel fabric that is routinely edited. Over time, edits
+are pushed to default. A scheduled task runs this script.
+
+The script detects version differences that occurred between the current moment
+and one day prior. Those changes are then inserted into a companion parcel fabric
+hosted in AGOL.
+
+https://developers.arcgis.com/python/latest/api-reference/arcgis.features.managers.html#version
+https://developers.arcgis.com/rest/services-reference/enterprise/differences/
+"""
+
+import datetime
+from datetime import timedelta, timezone
+
+from arcgis.gis import GIS
+from arcgis.features import FeatureLayer, FeatureLayerCollection, FeatureSet
+
+# Timestamp for finding version differences:
+from_date = datetime.datetime.now(timezone.utc)
+from_timestamp = (from_date - timedelta(days=1)).timestamp() * 1000
+
+now = datetime.datetime.now(timezone.utc)
+to_timestamp = int(now.timestamp() * 1000)
+
+# Connect to the enterprises
+parent_gis = GIS(profile="dev_enterprise_profile")  # prod enterprise
+target_gis = GIS(profile="dev_online_parcels")  # public online
+
+# FeatureServer endpoints
+source_item = parent_gis.content.get("01a56b31801f445c8c76624a4118094a")  # enterprise
+target_item = target_gis.content.get("1bdec1c1fd61433d9da9cda23ea57be0")  # online
+source_service_url = source_item.url
+target_service_url = target_item.url
+
+# Source parcel fabric feature layer collection
+production_parcels = FeatureLayerCollection(source_service_url, parent_gis)
+
+# List of layer IDs for Differences:
+# Records, Connection Lines, Points, Tax Lines, Tax Polygons
+# Ensure layer Ids are the same between both servers or find a way to
+# tie them to each other
+fabric_layers = [
+    l.properties.id
+    for l in production_parcels.layers
+    if l.properties.id in [1, 7, 8, 14, 15]
+]
+
+# Version management server endpoint
+vms = production_parcels.versions
+
+# Get differences
+with vms.get_by_name("sde", "DEFAULT", None) as version:
+    differences = version.differences(
+        result_type="features",
+        layers=fabric_layers,
+        moment=to_timestamp,
+        from_moment=from_timestamp,
+        future=False,
+    )
+    print(differences)
+
+# Parse differences by insert, update and delete
+edit_type = {}
+for feature in differences["features"]:
+    layer_id = feature["layerId"]
+    edit_type[layer_id] = {}
+    for op in ["inserts", "updates", "deletes"]:
+        if op in feature:
+            edit_type[layer_id][op] = feature[op]
+
+            features_dict = {
+                "features": [
+                    {"attributes": feat["attributes"], "geometry": feat["geometry"]}
+                    for feat in feature[op]
+                ]
+            }
+
+            feature_set = FeatureSet.from_dict(features_dict)
+            fl = FeatureLayer(f"{target_service_url}/{layer_id}", target_gis)
+            if op == "inserts":
+                result = fl.edit_features(adds=feature_set, use_global_ids=True, gdb_version=None)
+                print("Inserts:", layer_id, result)
+            elif op == "updates":
+                result = fl.edit_features(updates=feature_set, use_global_ids=True)
+                print("Updates:", layer_id, result)
+            else:
+                result = fl.edit_features(deletes=feature_set, use_global_ids=True)
+                print(op, layer_id, result)
+        else:
+            edit_type[layer_id][op] = []