Fix #3069. (Again) review all occurrences of users_collection and collection.name

src/blenderbim/blenderbim/bim/module/drawing/annotation.py

@@ -45,7 +45,7 @@ class Annotator:
             font.name = "OpenGost Type B TT"
         obj.data.font = font
         obj.data.BIMTextProperties.font_size = "2.5"
-        collection = bpy.context.scene.camera.users_collection[0]
+        collection = bpy.context.scene.camera.BIMObjectProperties.collection
         collection.objects.link(obj)
         Annotator.resize_text(obj)
         return obj
@@ -53,9 +53,10 @@ class Annotator:
     @staticmethod
     def resize_text(text_obj):
         camera = None
-        for obj in text_obj.users_collection[0].objects:
+        group = tool.Drawing.get_drawing_group(tool.Ifc.get_entity(text_obj))
-            if isinstance(obj.data, bpy.types.Camera):
+        for element in tool.Drawing.get_drawing_elements(group):
-                camera = obj
+            if element.is_a("IfcAnnotation") and element.ObjectType == "DRAWING":
+                camera = tool.Ifc.get_object(element)
                 break
         if not camera:
             return
@@ -112,7 +113,7 @@ class Annotator:
         co1, _, _, _ = Annotator.get_placeholder_coords(camera)
         matrix_world = camera.matrix_world.copy()
         matrix_world.translation = co1
-        collection = camera.users_collection[0]
+        collection = camera.BIMObjectProperties.collection
 
         if object_type == "TEXT":
             obj = bpy.data.objects.new(object_type, None)

src/blenderbim/blenderbim/bim/module/drawing/helper.py

@@ -269,7 +269,7 @@ def get_active_drawing(scene):
     props = scene.DocProperties
     try:
         camera = tool.Ifc.get_object(tool.Ifc.get().by_id(props.active_drawing_id))
-        return camera.users_collection[0], camera
+        return camera.BIMObjectProperties.collection, camera
     except:
         return None, None
 

src/blenderbim/blenderbim/bim/module/drawing/operator.py

@@ -288,7 +288,7 @@ class CreateDrawing(bpy.types.Operator):
             bpy.ops.render.render(write_still=True)
         else:
             previous_visibility = {}
-            for obj in self.camera.users_collection[0].objects:
+            for obj in self.camera.BIMObjectProperties.collection.objects:
                 if bpy.context.view_layer.objects.get(obj.name):
                     previous_visibility[obj.name] = obj.hide_get()
                     obj.hide_set(True)
@@ -1350,7 +1350,7 @@ class ResizeText(bpy.types.Operator):
     # TODO: check undo redo
 
     def execute(self, context):
-        for obj in context.scene.camera.users_collection[0].objects:
+        for obj in context.scene.camera.BIMObjectProperties.collection.objects:
             if isinstance(obj.data, bpy.types.TextCurve):
                 annotation.Annotator.resize_text(obj)
         return {"FINISHED"}

src/blenderbim/blenderbim/bim/module/drawing/prop.py

@@ -231,7 +231,7 @@ def toggleDecorations(self, context):
     toggle = self.should_draw_decorations
     if toggle:
         # TODO: design a proper text variable templating renderer
-        collection = context.scene.camera.users_collection[0]
+        collection = context.scene.camera.BIMObjectProperties.collection
         for obj in collection.objects:
             element = tool.Ifc.get_entity(obj)
             if not element or not tool.Drawing.is_annotation_object_type(element, ["TEXT", "TEXT_LEADER"]):

src/blenderbim/blenderbim/bim/module/model/pie.py

@@ -68,7 +68,7 @@ class PieUpdateContainer(bpy.types.Operator):
             if not obj.BIMObjectProperties.ifc_definition_id:
                 continue
             for collection in obj.users_collection:
-                spatial_obj = bpy.data.objects.get(collection.name)
+                spatial_obj = collection.BIMCollectionProperties.obj
                 if spatial_obj and spatial_obj.BIMObjectProperties.ifc_definition_id:
                     blenderbim.core.spatial.assign_container(
                         tool.Ifc, tool.Collector, tool.Spatial, structure_obj=spatial_obj, element_obj=obj

src/blenderbim/blenderbim/bim/module/model/product.py

@@ -128,20 +128,9 @@ class AddConstrTypeInstance(bpy.types.Operator):
 
         obj.location = context.scene.cursor.location
 
-        collection = None
+        collection = context.view_layer.active_layer_collection.collection
-        if (
-            building_obj
-            and building_element
-            and building_element.is_a() in ["IfcWall", "IfcWallStandardCase", "IfcCovering"]
-            and instance_class in ["IfcWindow", "IfcDoor"]
-        ):
-            # Fills should be a sibling to the building element
-            collection = building_obj.users_collection[0]
-        if not collection:
-            collection = context.view_layer.active_layer_collection.collection
-
         collection.objects.link(obj)
-        collection_obj = bpy.data.objects.get(collection.name)
+        collection_obj = collection.BIMCollectionProperties.obj
 
         bpy.ops.bim.assign_class(obj=obj.name, ifc_class=instance_class)
         element = tool.Ifc.get_entity(obj)
@@ -150,6 +139,26 @@ class AddConstrTypeInstance(bpy.types.Operator):
         # Update required as core.type.assign_type may change obj.data
         context.view_layer.update()
 
+        if (
+            building_obj
+            and building_element
+            and building_element.is_a() in ["IfcWall", "IfcWallStandardCase", "IfcCovering"]
+            and instance_class in ["IfcWindow", "IfcDoor"]
+        ):
+            # Fills should be a sibling to the building element
+            parent = ifcopenshell.util.element.get_aggregate(building_element)
+            if parent:
+                parent_obj = tool.Ifc.get_object(parent)
+                blenderbim.core.aggregate.assign_object(
+                    tool.Ifc, tool.Aggregate, tool.Collector, relating_obj=parent_obj, related_obj=obj
+                )
+            else:
+                parent = ifcopenshell.util.element.get_container(building_element)
+                parent_obj = tool.Ifc.get_object(parent)
+                blenderbim.core.spatial.assign_container(
+                    tool.Ifc, tool.Collector, tool.Spatial, structure_obj=parent_obj, element_obj=obj
+                )
+
         # set occurences properties for the types defined with modifiers
         if instance_class in ["IfcWindow", "IfcDoor"]:
             pset_name = f"BBIM_{instance_class[3:]}"
@@ -462,11 +471,6 @@ class MirrorElements(bpy.types.Operator, tool.Ifc.Operator):
 
             obj.matrix_world = newmat
 
-    def copy_obj(self, obj):
-        new = obj.copy()
-        new.data = wall2.data.copy()
-        wall1.users_collection[0].objects.link(wall2)
-        blenderbim.core.root.copy_class(tool.Ifc, tool.Collector, tool.Geometry, tool.Root, obj=wall2)
 
 
 def generate_box(usecase_path, ifc_file, settings):

src/blenderbim/blenderbim/bim/module/model/profile.py

@@ -53,7 +53,7 @@ class DumbProfileGenerator:
         self.axis_context = ifcopenshell.util.representation.get_context(tool.Ifc.get(), "Model", "Axis", "GRAPH_VIEW")
         props = bpy.context.scene.BIMModelProperties
         self.collection = bpy.context.view_layer.active_layer_collection.collection
-        self.collection_obj = bpy.data.objects.get(self.collection.name)
+        self.collection_obj = self.collection.BIMCollectionProperties.obj
         self.depth = props.extrusion_depth
         self.rotation = 0
         self.location = Vector((0, 0, 0))

src/blenderbim/blenderbim/bim/module/model/slab.py

@@ -133,7 +133,7 @@ class DumbSlabGenerator:
 
         props = bpy.context.scene.BIMModelProperties
         self.collection = bpy.context.view_layer.active_layer_collection.collection
-        self.collection_obj = bpy.data.objects.get(self.collection.name)
+        self.collection_obj = self.collection.BIMCollectionProperties.obj
         self.depth = sum(thicknesses) * unit_scale
         self.width = 3
         self.length = 3

src/blenderbim/blenderbim/bim/module/model/space.py

@@ -38,7 +38,7 @@ class GenerateSpace(bpy.types.Operator, tool.Ifc.Operator):
     @classmethod
     def poll(cls, context):
         collection = context.view_layer.active_layer_collection.collection
-        collection_obj = bpy.data.objects.get(collection.name)
+        collection_obj = collection.BIMCollectionProperties.obj
         return tool.Ifc.get_entity(collection_obj)
 
     def _execute(self, context):
@@ -60,7 +60,7 @@ class GenerateSpace(bpy.types.Operator, tool.Ifc.Operator):
                 relating_type = None
 
         collection = context.view_layer.active_layer_collection.collection
-        collection_obj = bpy.data.objects.get(collection.name)
+        collection_obj = collection.BIMCollectionProperties.obj
         if not collection_obj:
             bpy.context.window_manager.popup_menu(msg, title="Error", icon="ERROR")
             return
@@ -203,29 +203,19 @@ class GenerateSpacesFromWalls(bpy.types.Operator, tool.Ifc.Operator):
         active_obj = bpy.context.active_object
 
         if not active_obj:
-            self.report({'ERROR'}, "No active object. Please select a wall")
+            self.report({"ERROR"}, "No active object. Please select a wall")
             return
 
-        element = None
         element = tool.Ifc.get_entity(active_obj)
-        if element:
+        if element and not element.is_a("IfcWall"):
-            if not element.is_a("IfcWall"):
+            return self.report({"ERROR"}, "The active object is not a wall. Please select a wall.")
-                self.report({'ERROR'}, "The active object is not a wall. Please select a wall.")
-                return
 
-        collection = active_obj.users_collection[0]
+        container = ifcopenshell.util.element.get_container(element)
-        collection_obj = bpy.data.objects.get(collection.name)
+        if not container:
-        if not collection_obj:
+            self.report({"ERROR"}, "The wall is not contained.")
-            self.report({'ERROR'}, "No collection found. Please insert one.")
-            return
-
-        spatial_element = tool.Ifc.get_entity(collection_obj)
-        if not spatial_element:
-            self.report({'ERROR'}, "The collection hasn't an ifc space entity. Please provide one.")
-            return
 
         if not bpy.context.selected_objects:
-            self.report({'ERROR'}, "No selected objects found. Please select walls.")
+            self.report({"ERROR"}, "No selected objects found. Please select walls.")
             return
 
         x, y, z = active_obj.matrix_world.translation.xyz
@@ -237,19 +227,18 @@ class GenerateSpacesFromWalls(bpy.types.Operator, tool.Ifc.Operator):
 
         polys = self.get_polygons(boundary_elements)
 
-        converted_tolerance = self.get_converted_tolerance(tolerance = 0.03)
+        converted_tolerance = self.get_converted_tolerance(tolerance=0.03)
 
-        union = shapely.ops.unary_union(polys).buffer(converted_tolerance, cap_style = 2, join_style = 2)
+        union = shapely.ops.unary_union(polys).buffer(converted_tolerance, cap_style=2, join_style=2)
 
-        i=0
+        for i, linear_ring in enumerate(union.interiors):
-        for linear_ring in union.interiors:
             poly = Polygon(linear_ring)
-            poly = poly.buffer(converted_tolerance, single_sided=True, cap_style = 2, join_style = 2)
+            poly = poly.buffer(converted_tolerance, single_sided=True, cap_style=2, join_style=2)
 
             bm = self.get_bmesh_from_polygon(poly, mat, h)
 
             name = "Space" + str(i)
-            mesh = bpy.data.meshes.new(name = name)
+            mesh = bpy.data.meshes.new(name=name)
             bm.to_mesh(mesh)
             bm.free()
 
@@ -258,13 +247,12 @@ class GenerateSpacesFromWalls(bpy.types.Operator, tool.Ifc.Operator):
 
             self.set_obj_origin_to_bboxcenter(obj)
 
-            collection.objects.link(obj)
+            context.view_layer.active_layer_collection.collection.objects.link(obj)
-
             bpy.ops.bim.assign_class(obj=obj.name, ifc_class="IfcSpace")
-            i+=1
+            container_obj = tool.Ifc.get_object(container)
-
+            blenderbim.core.spatial.assign_container(
-        return {"FINISHED"}
+                tool.Ifc, tool.Collector, tool.Spatial, structure_obj=container_obj, element_obj=obj
-
+            )
 
     def get_boundary_elements(self, selected_objects):
         boundary_elements = []
@@ -302,15 +290,15 @@ class GenerateSpacesFromWalls(bpy.types.Operator, tool.Ifc.Operator):
     def get_converted_tolerance(self, tolerance):
         model = tool.Ifc.get()
         project_unit = ifcopenshell.util.unit.get_project_unit(model, "LENGTHUNIT")
-        prefix=getattr(project_unit, "Prefix", None)
+        prefix = getattr(project_unit, "Prefix", None)
 
         converted_tolerance = ifcopenshell.util.unit.convert(
-                                                        value = tolerance,
+            value=tolerance,
-                                                        from_prefix = None,
+            from_prefix=None,
-                                                        from_unit = "METRE",
+            from_unit="METRE",
-                                                        to_prefix = prefix,
+            to_prefix=prefix,
-                                                        to_unit = project_unit.Name,
+            to_unit=project_unit.Name,
-                                                        )
+        )
         return tolerance
 
     def get_bmesh_from_polygon(self, poly, mat, h):
@@ -335,7 +323,7 @@ class GenerateSpacesFromWalls(bpy.types.Operator, tool.Ifc.Operator):
         extruded_verts = [g for g in extrusion["geom"] if isinstance(g, bmesh.types.BMVert)]
         bmesh.ops.translate(bm, vec=[0.0, 0.0, h], verts=extruded_verts)
 
-        bmesh.ops.recalc_face_normals(bm, faces = bm.faces)
+        bmesh.ops.recalc_face_normals(bm, faces=bm.faces)
 
         return bm
 

src/blenderbim/blenderbim/bim/module/model/wall.py

@@ -434,7 +434,7 @@ class DumbWallGenerator:
 
         props = bpy.context.scene.BIMModelProperties
         self.collection = bpy.context.view_layer.active_layer_collection.collection
-        self.collection_obj = bpy.data.objects.get(self.collection.name)
+        self.collection_obj = self.collection.BIMCollectionProperties.obj
         self.width = self.layers["thickness"]
         self.height = props.extrusion_depth
         self.length = props.length
@@ -934,7 +934,8 @@ class DumbWallJoiner:
     def duplicate_wall(self, wall1):
         wall2 = wall1.copy()
         wall2.data = wall2.data.copy()
-        wall1.users_collection[0].objects.link(wall2)
+        for collection in wall1.users_collection:
+            collection.objects.link(wall2)
         blenderbim.core.root.copy_class(tool.Ifc, tool.Collector, tool.Geometry, tool.Root, obj=wall2)
         return wall2
 

src/blenderbim/blenderbim/bim/module/project/operator.py

@@ -371,7 +371,8 @@ class AppendLibraryElement(bpy.types.Operator):
         if not type_collection:
             type_collection = bpy.data.collections.new("Types")
             for collection in bpy.context.view_layer.layer_collection.children:
-                if "IfcProject/" in collection.name:
+                collection_obj = collection.BIMCollectionProperties.obj
+                if collection_obj and tool.Ifc.get_entity(collection_obj).is_a("IfcProject"):
                     collection.collection.children.link(type_collection)
                     collection.children["Types"].hide_viewport = True
                     break

src/blenderbim/blenderbim/core/drawing.py

@@ -318,7 +318,7 @@ def update_drawing_name(ifc, drawing_tool, drawing=None, name=None):
         ifc.run("attribute.edit_attributes", product=group, attributes={"Name": name})
     collection = drawing_tool.get_drawing_collection(drawing)
     if collection:
-        drawing_tool.set_drawing_collection_name(group, collection)
+        drawing_tool.set_drawing_collection_name(drawing, collection)
 
     reference = drawing_tool.get_drawing_document(drawing)
     information = drawing_tool.get_reference_document(reference)

src/blenderbim/blenderbim/core/tool.py

@@ -311,7 +311,7 @@ class Drawing:
     def run_drawing_activate_model(cls): pass
     def run_root_assign_class(cls, obj=None, ifc_class=None, predefined_type=None, should_add_representation=True, context=None, ifc_representation_class=None): pass
     def select_assigned_product(cls, drawing): pass
-    def set_drawing_collection_name(cls, group, collection): pass
+    def set_drawing_collection_name(cls, drawing, collection): pass
     def set_name(cls, element, name): pass
     def setup_annotation_object(cls, obj, object_type): pass
     def setup_shading_styles_path(cls, resource_path): pass

src/blenderbim/blenderbim/tool/collector.py

@@ -143,11 +143,8 @@ class Collector(blenderbim.core.tool.Collector):
                     return axes_col[0]
                 return bpy.data.collections.new(axes)
 
-        if element.is_a("IfcAnnotation"):
+        if element.is_a("IfcAnnotation") and element.ObjectType == "DRAWING":
-            for rel in element.HasAssignments or []:
+            return cls._create_own_collection(obj)
-                if rel.is_a("IfcRelAssignsToGroup") and rel.RelatingGroup.ObjectType == "DRAWING":
-                    name = "IfcGroup/" + rel.RelatingGroup.Name
-                    return bpy.data.collections.get(name) or bpy.data.collections.new(name)
 
         if element.is_a("IfcStructuralMember"):
             return bpy.data.collections.get("Members") or bpy.data.collections.new("Members")

src/blenderbim/blenderbim/tool/drawing.py

@@ -364,7 +364,7 @@ class Drawing(blenderbim.core.tool.Drawing):
     def get_drawing_collection(cls, drawing):
         obj = tool.Ifc.get_object(drawing)
         if obj:
-            return obj.users_collection[0]
+            return obj.BIMObjectProperties.collection
 
     @classmethod
     def get_drawing_group(cls, drawing):
@@ -759,8 +759,8 @@ class Drawing(blenderbim.core.tool.Drawing):
         )
 
     @classmethod
-    def set_drawing_collection_name(cls, group, collection):
+    def set_drawing_collection_name(cls, drawing, collection):
-        collection.name = f"IfcGroup/{group.Name}"
+        collection.name = tool.Loader.get_name(drawing)
 
     @classmethod
     def set_name(cls, element, name):
@@ -1486,8 +1486,8 @@ class Drawing(blenderbim.core.tool.Drawing):
                     project_collection.children["Views"].children[collection.name].hide_viewport = True
                     bpy.data.collections.get(collection.name).hide_render = True
 
-                    project_collection.children["Views"].children[camera.users_collection[0].name].hide_viewport = False
+                    project_collection.children["Views"].children[camera.BIMObjectProperties.collection.name].hide_viewport = False
-        bpy.data.collections.get(camera.users_collection[0].name).hide_render = False
+        camera.BIMObjectProperties.collection.hide_render = False
         tool.Spatial.set_active_object(camera)
 
         # Sync viewport objects visibility with selectors from EPset_Drawing/Include and /Exclude