fix has_one through with list action
fix has_one through with list action

mallikarjunayaddala/active_scaffold,budree/active_scaffold,AlbertoBarrago/active_scaffold,budree/active_scaffold,activescaffold/active_scaffold,activescaffold/active_scaffold,budree/active_scaffold,mallikarjunayaddala/active_scaffold,mallikarjunayaddala/active_scaffold,AlbertoBarrago/active_scaffold,activescaffold/active_scaffold,AlbertoBarrago/active_scaffold