reousces 有一些參數可以 filter 掉不必要的 action 以防止被實作出來

```ruby
resources : boards, :except => [:create, :new, :destroy]
```

或 

```ruby
resources : boards, :only => [:index, :show, :edit, :update]
```

其餘類推   根據票給的需求邏輯做作看