def set_has_many_attr(col, *instances)
      _col = column(col)
      unload_relation(_col)
      push_has_many_attr(_col, *instances)
      instances
    end
def set_has_many_attr(col, *instances)
      _col = column(col)
      unload_relation(_col)
      push_has_many_attr(_col, *instances)
      instances
    end
def set_has_many_attr ( col , * instances ) _col = column ( col ) unload_relation ( _col ) push_has_many_attr ( _col , instances ) instances end
TODO clean up existing reference, check rails
TODO clean up existing reference check rails