feat: base wf 捕获expr is None的错误

apps/wf/services.py

@@ -194,6 +194,8 @@ class WfService(object):
                                 expr = getattr(expr.first(), i)
                             else:
                                 raise
+                    if expr is None:
+                        raise ParseError('未找到对应部门')
                     dpts = Dept.objects.filter(id=expr.id)
                 user_queryset = user_queryset.filter(depts__in=dpts)
             # if state.filter_policy == 1: