RoR：JSON映射：key =＆gt; ＆＃34;值＆＃34; - 更改所有密钥名称

Question

这就是我所拥有的：

def index
    @attachments = current_user.attachments.all
    respond_to do |format|
      format.json do
        render :json => @attachments.map { |o| { url: o.picture.thumb.url }}
      end
    end
  end

  

=＆GT; [{：网址 =＆gt;＆＃34; /uploads/attachment/picture/7/thumb_df3c0c3c.jpg"}，{：网址 =＆gt;＆＃ 34; /uploads/attachment/picture/12/thumb_dd7839ee.jpg"}，...}]

如何将密钥从：url 更改为：thumb ？

=> [{:thumb=>"/uploads/attachment/picture/7/thumb_df3c0c3c.jpg"},
 {:thumb=>"/uploads/attachment/picture/12/thumb_dd7839ee.jpg"}, ... }]

以下是整个对象： render：json =＆gt; @attachments

我的目标：拇指：拇指：＆＃34; /上传/附加......＆＃34;

背景：https://www.froala.com/wysiwyg-editor/docs/concepts/image-manager

我使用gem carrierwave创建一个拇指

Answer 1

response.map! { |urls| { :thumb =>  urls[:url] }  }

Answer 2

更改＆＃34; url＆＃34;到＆＃34;拇指＆＃34;

render :json => @attachments.map { |o| { **thumb: o.picture.thumb.url** }}