回形针检索样式尺寸

Question

I work with Rails 4 and use PaperClip to attach images to different models.

I would like to retrieve styles dimensions in order to use them as a hint for user, something like:

<%= t('image_dimensions_hint', :dimensions => Person.avatar.standard') %>

When my model Person looks like that:

has_attached_file :avatar,
 :styles => { 
   :standard => "150x150>",
   :small => "50x50>>",
}

Is it possible?

Answer 1

不确定这个问题，但我认为您可以通过以下方式获得尺寸：

:dimensions => Paperclip::Geometry.from_file(file.queued_for_write[:original].path)