如何添加数据到返回的ActiveRecord查询记录

Question

我正在做一个简单的查询到数据库表发送到外部服务，但我需要添加一个元素到每个返回的记录之前，我这样做。

app.rb

get "/:task/:account_id/contacts" do 
    @contacts = Contact.where("Account = ?", params[:account_id]) 

    @contacts.to_json 
end 

提供我，我需要格式化为

[{"Name":"Charlie Spencer","sfid":"a014100000AYi2ZABG","id":29,"Account":"a054100000FsEA8AAN"},{"Name":"Philip Leak","sfid":"a014100000AYi3PCHZ","id":48,"Account":"a054100000FsEA8AAN"}] 

数据，但我需要通过关闭发送前对结果的路线中添加提供的任务json本身：

[{"Name":"Charlie Spencer","sfid":"a014100000AYi2ZABG","id":29,"Account":"a054100000FsEA8AAN","Task":"a014100000AYiWMCC1"},{"Name":"Philip Leak","sfid":"a014100000AYi3PCHZ","id":48,"Account":"a054100000FsEA8AAN","Task":"a014100000AYiWMCC1"}] 

如何迭代在发送之前返回结果？

Answer 1

试试这个。 map方法来转换您的结果，attributes方法有一个字段和值的散列和merge方法来添加任务。

get "/:task/:account_id/contacts" do 
    @contacts = Contact.where("Account = ?", params[:account_id]).map do |c| 
    c.attributes.merge("Task": params[:task]) 
    end 

    @contacts.to_json 
end