Add "level" filter

src/backend/InvenTree/part/api.py

@@ -284,11 +284,32 @@ class CategoryDetail(CategoryMixin, OutputOptionsMixin, CustomRetrieveUpdateDest
         )
 
 
+class CategoryTreeFilter(FilterSet):
+    """Custom filterset class for the CategoryTree endpoint."""
+
+    class Meta:
+        """Metaclass options for this filterset."""
+
+        model = PartCategory
+        fields = ['level']
+
+    max_level = rest_filters.NumberFilter(
+        label=_('Max Level'),
+        method='filter_max_level',
+        help_text=_('Limit the depth of the category tree'),
+    )
+
+    def filter_max_level(self, queryset, name, value):
+        """Filter by the maximum depth of the category tree."""
+        return queryset.filter(level__lte=value)
+
+
 class CategoryTree(ListAPI):
     """API endpoint for accessing a list of PartCategory objects ready for rendering a tree."""
 
     queryset = PartCategory.objects.all()
     serializer_class = part_serializers.CategoryTree
+    filterset_class = CategoryTreeFilter
 
     filter_backends = SEARCH_ORDER_FILTER
 

src/backend/InvenTree/part/serializers.py

@@ -188,7 +188,16 @@ class CategoryTree(InvenTree.serializers.InvenTreeModelSerializer):
         """Metaclass defining serializer fields."""
 
         model = PartCategory
-        fields = ['pk', 'name', 'parent', 'icon', 'structural', 'subcategories']
+        fields = [
+            'pk',
+            'name',
+            'description',
+            'parent',
+            'level',
+            'icon',
+            'structural',
+            'subcategories',
+        ]
 
     subcategories = serializers.IntegerField(label=_('Subcategories'), read_only=True)