Fix #3003.

src/blenderbim/blenderbim/core/drawing.py

@@ -189,7 +189,7 @@ def add_drawing(ifc, collector, drawing, target_view=None, location_hint=None):
     ifc.run("group.assign_group", group=group, products=[element])
     collector.assign(camera)
     pset = ifc.run("pset.add_pset", product=element, name="EPset_Drawing")
-    if drawing.get_unit_system == "METRIC":
+    if drawing.get_unit_system() == "METRIC":
         scale = "1/100"
         human_scale = "1:100"
     else:

src/blenderbim/blenderbim/core/tool.py

@@ -278,6 +278,7 @@ class Drawing:
     def get_reference_document(cls, reference): pass
     def get_reference_location(cls, reference): pass
     def get_text_literal(cls, obj): pass
+    def get_unit_system(cls): pass
     def import_assigned_product(cls, obj): pass
     def import_drawings(cls): pass
     def import_schedules(cls): pass

src/blenderbim/blenderbim/tool/drawing.py

@@ -353,6 +353,10 @@ class Drawing(blenderbim.core.tool.Drawing):
     def get_path_with_ext(cls, path, ext):
         return os.path.splitext(path)[0] + f".{ext}"
 
+    @classmethod
+    def get_unit_system(cls):
+        return bpy.context.scene.unit_settings.system
+
     @classmethod
     def get_drawing_collection(cls, drawing):
         obj = tool.Ifc.get_object(drawing)

src/blenderbim/test/core/test_drawing.py

@@ -264,6 +264,7 @@ class TestAddDrawing:
         drawing.get_default_drawing_resource_path("Markers").should_be_called().will_return("markers.svg")
         drawing.get_default_drawing_resource_path("Symbols").should_be_called().will_return("symbols.svg")
         drawing.get_default_drawing_resource_path("Patterns").should_be_called().will_return("patterns.svg")
+        drawing.get_unit_system().should_be_called().will_return("METRIC")
         ifc.run(
             "pset.edit_pset",
             pset="pset",