BOM filter by category (#9989)

* Add "category" filter for BomItem API endpoint

* Filter BOM table by part category

* Tweak filter label

* Bump API version

* Schema annotation

* Fix playwright test

src/backend/InvenTree/InvenTree/api_version.py

@@ -1,12 +1,15 @@
 """InvenTree API version information."""
 
 # InvenTree API version
-INVENTREE_API_VERSION = 365
+INVENTREE_API_VERSION = 366
 
 """Increment this API version number whenever there is a significant change to the API that any clients need to know about."""
 
 INVENTREE_API_TEXT = """
 
+v366 -> 2025-07-09 : https://github.com/inventree/InvenTree/pull/9987
+    - Adds "category" filter to BomItem API endpoint
+
 v365 -> 2025-07-09 : https://github.com/inventree/InvenTree/pull/9984
     - Allow filtering of DataOutput API by "user" field
     - Allow individual deletion of DataOutput objects via the API

src/backend/InvenTree/part/api.py

@@ -1631,10 +1631,24 @@ class BomFilter(rest_filters.FilterSet):
         queryset=Part.objects.all(), method='filter_part', label=_('Part')
     )
 
+    @extend_schema_field(OpenApiTypes.INT)
     def filter_part(self, queryset, name, part):
         """Filter the queryset based on the specified part."""
         return queryset.filter(part.get_bom_item_filter())
 
+    category = rest_filters.ModelChoiceFilter(
+        queryset=PartCategory.objects.all(),
+        method='filter_category',
+        label=_('Category'),
+    )
+
+    @extend_schema_field(OpenApiTypes.INT)
+    def filter_category(self, queryset, name, category):
+        """Filter the queryset based on the specified PartCategory."""
+        cats = category.get_descendants(include_self=True)
+
+        return queryset.filter(sub_part__category__in=cats)
+
     uses = rest_filters.ModelChoiceFilter(
         queryset=Part.objects.all(), method='filter_uses', label=_('Uses')
     )