group by 语句的使用 resources do member的使用

group by 语句

select city ,count(*) as num from staff group by city;

resources :photos do

  member do

    get 'preview'

  end

end

定义preview

def preview

end

但是不能根据id查看,所以直接使用show即可

用于查找id

在controller文件可以增加

def show

end

这样也是可以的。那么上边的内容就可以直接换掉

def show
16       render json: {
17         image: &quot;ipfs://QmQMJX4azuY2yREjprkwEUvX9caSAbPHE8MnwzpzLJungk&quot;,
18         external_url: &quot;https://www.lueluelue.link/&quot;,
19         desscription: &quot;Congratulations on being the first users of LUELUELUE. you are a true Web3 supporter and builder with unwavering pioneering spirit and extraordina
20         animation_url: &quot;ipfs://QmRuTwaZdZ65aEAz5NPwz8N6QskQsTQwkX4X98ior9GaNN&quot;,
21         name: &quot;LUELUELUE Pioneer Medal #{params[:id]}&quot;,
22         arrtributes: &#39;[]&#39;,
23       }
24     end

resources :nft_assets, only: [:show] do
102       collection do
103         post :update_nft_assets
104       end
105     end

#{params[:id]}

Rails Routing from the Outside In — Ruby on Rails Guides