Paperclip 删除上传的图片 和 NotIdentifiedByImageMagickError

   1.在成功安装ImageMagick了后对图片处理是出现下面错误： 

An error was received while processing: #<Paperclip::Errors::NotIdentifiedBy
ImageMagickError: Paperclip::Errors::NotIdentifiedByImageMagickError>

   错误解决：在Rails项目的config/environments/development.rb文件加入：

Paperclip.options[:command_path] = '/opt/local/bin/' #Mac OS 下

    然后重启服务器。

    (ps: imageMagick和Paperclip的安装请转到  http://unremittingly.iteye.com/blog/2019512) 

   2.用Paperclip上传的图片如何删除。

   

image_news_deleted = ImageNews.find(params[:id])#根据id找到对应的image_news
image_news_deleted.image.destroy #删除image_news对应的存储在public文件夹下的image
ImageNews.delete(params[:id]) #删除存储的image_news

   (ps:ImageNews模型相关属性的创建请见我的 http://unremittingly.iteye.com/blog/2019512)