Add "remove brick relation" operator

src/blenderbim/blenderbim/bim/module/brick/__init__.py

@@ -36,6 +36,7 @@ classes = (
     operator.SerializeBrick,
     operator.AddBrickNamespace,
     operator.SetBrickListRoot,
+    operator.RemoveBrickRelation,
     prop.Brick,
     prop.BIMBrickProperties,
     ui.BIM_PT_brickschema,

src/blenderbim/blenderbim/bim/module/brick/data.py

@@ -80,28 +80,32 @@ class BrickschemaData:
             )
         )
         for row in query:
-            predicate = row.get("predicate").toPython().split("#")[-1]
+            predicate = row.get("predicate")
+            predicate_name = predicate.toPython().split("#")[-1]
             object = row.get("object")
+            object_name = object.toPython().split("#")[-1]
             results.append(
                 {
                     "predicate": predicate,
-                    "object": object.toPython().split("#")[-1],
+                    "predicate_name": predicate_name,
+                    "object": object,
+                    "object_name": object_name,
                     "is_uri": isinstance(object, URIRef),
                     "object_uri": object.toPython(),
                     "is_globalid": predicate == "globalID",
                 }
             )
-            if isinstance(row.get("object"), BNode):
+            # if isinstance(row.get("object"), BNode):
-                for s, p, o in BrickStore.graph.triples((object, None, None)):
+            #     for s, p, o in BrickStore.graph.triples((object, None, None)):
-                    results.append(
+            #         results.append(
-                        {
+            #             {
-                            "predicate": predicate + ":" + p.toPython().split("#")[-1],
+            #                 "predicate": predicate + ":" + p.toPython().split("#")[-1],
-                            "object": o.toPython().split("#")[-1],
+            #                 "object": o.toPython().split("#")[-1],
-                            "is_uri": isinstance(o, URIRef),
+            #                 "is_uri": isinstance(o, URIRef),
-                            "object_uri": o.toPython(),
+            #                 "object_uri": o.toPython(),
-                            "is_globalid": p.toPython().split("#")[-1] == "globalID",
+            #                 "is_globalid": p.toPython().split("#")[-1] == "globalID",
-                        }
+            #             }
-                    )
+            #         )
         return results
 
 

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

@@ -263,4 +263,17 @@ class SetBrickListRoot(bpy.types.Operator, Operator):
 
     def _execute(self, context):
         root = context.scene.BIMBrickProperties.brick_list_root
-        core.set_brick_list_root(tool.Brick, brick_root=root)
+        core.set_brick_list_root(tool.Brick, brick_root=root)
+
+
+class RemoveBrickRelation(bpy.types.Operator, Operator):
+    bl_idname = "bim.remove_brick_relation"
+    bl_label = "Remove Relation"
+    bl_options = {"REGISTER", "UNDO"}
+    predicate: bpy.props.StringProperty(name="Relation")
+    object: bpy.props.StringProperty(name="Object")
+
+    def _execute(self, context):
+        props = context.scene.BIMBrickProperties
+        brick = props.bricks[props.active_brick_index]
+        core.remove_brick_relation(tool.Brick, brick_uri=brick.uri, predicate=self.predicate, object=self.object)

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

@@ -75,4 +75,6 @@ class BIMBrickProperties(PropertyGroup):
     new_brick_namespace_alias: StringProperty(name="New Brick Namespace Alias")
     new_brick_namespace_uri: StringProperty(name="New Brick Namespace URI")
     brick_list_root: EnumProperty(name="Brick List Root", items=get_brick_roots)
-    brick_entity_create_type: EnumProperty(name="Brick Entity Types", items=get_brick_roots)
+    brick_entity_create_type: EnumProperty(name="Brick Entity Types", items=get_brick_roots)
+    brick_create_relations_toggled: BoolProperty(name="Brick Create Relations Toggled", default=False)
+    brick_edit_relations_toggled: BoolProperty(name="Brick Edit Relations Toggled", default=False)

src/blenderbim/blenderbim/bim/module/brick/ui.py

@@ -107,16 +107,27 @@ class BIM_PT_brickschema(Panel):
 
         self.layout.template_list("BIM_UL_bricks", "", self.props, "bricks", self.props, "active_brick_index")
 
+        if BrickschemaData.data["relations"]:
+            row = self.layout.row(align=True)
+            col = row.column()
+            col.alignment = "RIGHT"
+            row.prop(data=self.props, property="brick_create_relations_toggled", text="", icon="OUTLINER_DATA_GP_LAYER")
+            row.prop(data=self.props, property="brick_edit_relations_toggled", text="", icon="TOOL_SETTINGS")
+
         for relation in BrickschemaData.data["relations"]:
             row = self.layout.row(align=True)
-            row.label(text=relation["predicate"])
+            row.label(text=relation["predicate_name"])
-            row.label(text=relation["object"])
+            row.label(text=relation["object_name"])
-            if relation["is_uri"]:
+            if self.props.brick_edit_relations_toggled and relation["predicate_name"] != "type":
+                op = row.operator("bim.remove_brick_relation", text="", icon="UNLINKED")
+                op.predicate = relation["predicate"]
+                op.object = relation["object"]
+            if relation["is_uri"] and relation["predicate_name"] != "type":
                 op = row.operator("bim.view_brick_item", text="", icon="DISCLOSURE_TRI_RIGHT")
                 op.item = relation["object_uri"]
             if relation["is_globalid"]:
                 op = row.operator("bim.select_global_id", icon="RESTRICT_SELECT_OFF", text="")
-                op.global_id = relation["object"]
+                op.global_id = relation["object_name"]
 
 
 class BIM_PT_ifc_brickschema_references(Panel):

src/blenderbim/blenderbim/core/brick.py

@@ -126,3 +126,7 @@ def set_brick_list_root(brick, brick_root=None):
     brick.set_active_brick_class(brick_root)
     brick.clear_breadcrumbs()
 
+
+def remove_brick_relation(brick, brick_uri=None, predicate=None, object=None):
+    brick.remove_relation(brick_uri, predicate, object)
+    brick.run_refresh_brick_viewer()

src/blenderbim/blenderbim/tool/brick.py

@@ -104,6 +104,13 @@ class Brick(blenderbim.core.tool.Brick):
         ns_brick = Namespace("https://brickschema.org/schema/Brick#")
         BrickStore.graph.add((URIRef(source), ns_brick["feeds"], URIRef(destination)))
 
+    @classmethod
+    def remove_relation(cls, brick_uri, predicate, object):
+        if BrickStore.graph.triples((brick_uri, predicate, object)):
+            with BrickStore.new_changeset() as cs:
+                for triple in BrickStore.graph.triples((brick_uri, predicate, object)):
+                    cs.remove(triple)
+
     @classmethod
     def clear_brick_browser(cls):
         bpy.context.scene.BIMBrickProperties.bricks.clear()