Attachment filtering by filename (#12807)

* Attachment filtering by filename

* Update API version

src/backend/InvenTree/InvenTree/api_version.py

@@ -1,11 +1,14 @@
 """InvenTree API version information."""
 
 # InvenTree API version
-INVENTREE_API_VERSION = 543
+INVENTREE_API_VERSION = 544
 """Increment this API version number whenever there is a significant change to the API that any clients need to know about."""
 
 INVENTREE_API_TEXT = """
 
+v544 -> 2026-09-07 : https://github.com/inventree/InvenTree/pull/12807
+    - Adds filtering by filename on the Attachment list API endpoint
+
 v543 -> 2026-09-05 : https://github.com/inventree/InvenTree/pull/12762
     - Adds admin APIs for managing SSO applications
 

src/backend/InvenTree/common/api.py

@@ -873,6 +873,10 @@ class AttachmentFilter(FilterSet):
 
     tag_name = common.filters.TagsFilter()
 
+    filename = rest_filters.CharFilter(
+        field_name='attachment', lookup_expr='icontains', label=_('Filename')
+    )
+
 
 def get_viewable_attachment_model_types(user) -> set:
     """Return the set of attachment 'model_type' labels the user has 'view' permission for.
@@ -909,7 +913,7 @@ class AttachmentList(AttachmentMixin, BulkDeleteMixin, ListCreateAPI):
     filterset_class = AttachmentFilter
 
     ordering_fields = ['model_id', 'model_type', 'upload_date', 'file_size']
-    search_fields = ['comment', 'model_id', 'model_type']
+    search_fields = ['comment', 'model_id', 'model_type', 'attachment']
 
     def get_queryset(self):
         """Restrict the queryset to attachments linked to a model the user can view."""