Prevent indexing errors for small batch sizes #11556 (#11557)

arches/app/utils/index_database.py

@@ -262,9 +262,9 @@ def index_resources_using_singleprocessing(
                     bar = pyprind.ProgBar(resource_count, bar_char="█", title=title)
                 else:
                     bar = None
-
+            chunk_size = max(batch_size // 8, 8)
             for resource in optimize_resource_iteration(
-                resources, chunk_size=batch_size // 8
+                resources, chunk_size=chunk_size
             ):
                 resource.tiles = resource.prefetched_tiles
                 resource.descriptor_function = resource.graph.descriptor_function
@@ -402,7 +402,7 @@ def index_resources_by_type(
 def _index_resource_batch(resourceids, recalculate_descriptors, quiet=False):
 
     resources = Resource.objects.filter(resourceinstanceid__in=resourceids)
-    batch_size = int(len(resourceids) / 2)
+    batch_size = max(len(resourceids) // 2, 1)
     return index_resources_using_singleprocessing(
         resources=resources,
         batch_size=batch_size,

releases/7.6.2.md

@@ -6,9 +6,11 @@
 -   Fixes failure to serialize non-editable Django fields (e.g. auto-date fields) #[11272](https://github.com/archesproject/arches/issues/11272)
 -   Fixes bug in which resource relationships fail to appear in visualize mode if using default deny as a non-superuser #[11539](https://github.com/archesproject/arches/pull/11539)
 -   Fixes bypassing of display logic of details table in search results for client-cached resources #[11537](https://github.com/archesproject/arches/issues/11537)
+-   Fixes the indexing error when the number of resources in a batch becomes smaller than 8 #[11556](https://github.com/archesproject/arches/issues/11556)
 -   Fail with 404 rather than 500 (AttributeError) for missing search components in search_home route #[11532](https://github.com/archesproject/arches/issues/11532)
 -   Adds an alert message before running the bulk deletion #[11405](https://github.com/archesproject/arches/issues/11405)
 
+
 ### Dependency changes:
 
 ```