如何在JSON API上返回所选数据

Question

我已经创建了API，我有两个表用户和地址，我只想在单独的数组中返回州和城市，怎么回事？

    my controller  
           def show
             @address = Address.where(user_id:params[:id])
             render json: @address        
           end
 My postman output
       https://imgur.com/a/t5xHYBI
    #my expected output
     [
            { 
                "city": "palani",
                "city": "coimbatore",

            },
            {
                "state": "tamilnadu",
                "state": "tamilnadu",            
            }
        ]

Answer 1

您将需要了解JSON构建器，

从这里开始https://www.ruby-toolbox.com/categories/API_Builders

选择一个并相处。

我已经使用Jbuilder好几次了

Answer 2

创建json-jbuilder视图

应用程序/ [控制器] /show.json.jbuilder

json.id address.id
json.user_id address.user_id
json.city address.city
...

您的控制器动作

   def show
     @address = Address.where(user_id:params[:id])       
   end

有关更多详细信息，您可以阅读jBuilder文档https://github.com/rails/jbuilder