rails paperclip customize upload url path -

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this upload.rb

class upload < activerecord::base       belongs_to :post       has_attached_file :upload,styles: { medium: ["500x400>",:jpg], thumb: ["100x100>",:jpg]},url: "/post_images/post_:postid/:style/:filename"  def postid       self.post_id end end

i have column post_id. belongs_to represents have more 1 images 1 post. while saving files in folder instead of post_25. storing post_:postid

but if give :id working.

how can solve it. can this.

you should using paperclip's interpolations achieve functionality. first, start defining interpolation in initializer:

# config/initializers/interpolations.rb paperclip.interpolates :postid |attachment, style|   'post_' + attachment.instance.post.id end

then, can use :postid interpolation directly in attachment url declaration (remember restart server first):

# app/models/upload.rb has_attached_file :upload,styles: { medium: ["500x400>",:jpg], thumb: ["100x100>",:jpg]},url: "/post_images/:postid/:style/:filename"

note :postid not merely instance method you've defined in model – paperclip exclusively utilizes interpolations define dynamic variables within url/path declarations.


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